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  • Articles  (39)
  • resistance  (39)
  • 1980-1984  (39)
  • Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition  (39)
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  • Articles  (39)
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  • 1
    Electronic Resource
    Electronic Resource
    Screening for resistance to white rot caused by Sclerotium cepivorum Berk. in onions (Allium cepa L.) and leeks (Allium porrum L.) (1983)
    Springer
    Euphytica 32 (1983), S. 697-701 
    Details
    ISSN: 1573-5060
    Keywords: Allium cepa ; Allium porrum ; leeks ; onions ; resistance ; Sclerotium cepivorum ; screening method ; white rot
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary A method has been developed to screen onion and leek seedlings under controlled conditions for resistance to white rot. Considerable differences in resistance were found between cultivars of onions and leek respectively. The highest resistance levels were observed in the onion cultivars Beth Alpha and Pukekohe Longkeeper and in the leek cultivars Batina, Carentan and Elephant.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00042149
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  • 2
    Electronic Resource
    Electronic Resource
    Inheritance of resistance to the leaf aphid Nasonovia ribis-nigri in the wild lettuce species Lactuca virosa (1983)
    Springer
    Euphytica 32 (1983), S. 691-695 
    Details
    ISSN: 1573-5060
    Keywords: Lactuca virosa ; Leaf aphids ; Nasonovia ribis-nigri ; resistance ; inheritance ; multiple allelism
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Six almost completely resistant (CR) accessions of L. virosa and one partially resistant (PR) accession of this species were intercrossed to investigate the inheritance of resistance and the location of the resistance genes. The CR in all accessions appeared to be governed by one (incompletely) dominant allele designated as Nr and the PR and possibly susceptibility (S) too by a recessive allele nr. The alleles for CR, PR and S were present on one and the same locus. It is still uncertain whether the alleles for CR in the various accessions are different, the same applies for the alleles for PR and S.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00042148
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  • 3
    Electronic Resource
    Electronic Resource
    Inheritance of resistance to pea blight (Ascochyta pinodella) and induction of resistance in pea (Pisum sativum L.) (1984)
    Springer
    Euphytica 33 (1984), S. 9-11 
    Details
    ISSN: 1573-5060
    Keywords: Pisum sativum ; pea ; Ascochyta pinodella ; pea blight ; resistance
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Pea blight caused by Assochyta pinodella does considerable damage to the pea crop every year. To ascertain the inheritance of resistance to pea blight and incorporate resistance in the commercial cultivars, crosses were made between Kinnauri resistant to pea blight and four highly susceptible commercial pea cultivars — Bonneville, Lincoln, GC 141 and Sel. 18. Studies of the F1's, F2's, back crosses and F3's indicated that Kinnauri carries a dominant gene imparting resistance to pea blight.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00022743
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  • 4
    Electronic Resource
    Electronic Resource
    A recessive resistance gene for yellow rust (Puccinia striiformis West.) in bread wheat (Triticum aestivum L.) (1984)
    Springer
    Euphytica 33 (1984), S. 561-562 
    Details
    ISSN: 1573-5060
    Keywords: Triticum aestivum ; common wheat ; Puccinia striiformis ; yellow rust ; stripe rust ; resistance ; genetics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Three lines derived from the old ‘dirty’ Dutch land variety Gelderse Ris were resistant against race 66(70)EO(16) of yellow rust. It was found that this resistance was conditioned by one recessive gene provisionally coded yrGR.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00021157
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  • 5
    Electronic Resource
    Electronic Resource
    A re-examination of apparent selection in Globodera pallida on Solanum vernei hybrids (1984)
    Springer
    Euphytica 33 (1984), S. 583-586 
    Details
    ISSN: 1573-5060
    Keywords: Potatoes ; Solanum vernei ; Globodera pallida ; potato cyst-nematode ; resistance ; virulence
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary This paper re-examines the data in support of recent findings by Turner et al. (1984), that selection for virulence in Globodera pallida takes place on Solanum vernei hybrids. It is concluded that there are a number of factors that must be taken into account and that these data must be interpreted with caution.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00021160
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  • 6
    Electronic Resource
    Electronic Resource
    An instant bioassay for resistance of lettuce to the leaf aphid Myzus persicae (1984)
    Springer
    Euphytica 33 (1984), S. 825-831 
    Details
    ISSN: 1573-5060
    Keywords: Lactuca ; lettuce ; Myzus persicae ; leaf aphid ; resistance ; honeydew production ; instant bioassay
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary A reliable impression of the resistance of lettuce plants to the leaf aphid Myzus persicae can be obtained via aphid honeydew production. Under controlled temperatures, the number of honeydew droplets produced by these aphids per plant in 180 minutes with five plants per genotype offers a good criterion of this resistance.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00021909
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  • 7
    Electronic Resource
    Electronic Resource
    Molecular diversity and plant disease resistance: An electrophoretic comparison of near-isogenic lines of wilt-resistant or -susceptible Pisum sativum L. cv. William Massey (1982)
    Springer
    Euphytica 31 (1982), S. 341-348 
    Details
    ISSN: 1573-5060
    Keywords: Pisum sativum ; pea ; fusarium wilt ; resistance ; protein ; esterase ; polyacrylamide gradient gel electrophoresis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The soluble proteins from two near-isogenic lines of Pisum sativum. cv. William Massey have been compared electrophoretically. These lines differ in their physiological response to wilt (Fusarium oxysporum f. sp. pisi), one being susceptible and the other resistant. The total protein profiles derived from the two lines appear to be identical. The resistant line differs electrophoretically from the susceptible line in carrying an esterase component which has been derived from its resistant parent, cultivar Delwiche Commando.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00021649
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  • 8
    Electronic Resource
    Electronic Resource
    Resistance to the glasshouse whitefly (Trialeurodes vaporariorum Westw.) in sweet pepper (Capsicum annuum L.) (1982)
    Springer
    Euphytica 31 (1982), S. 977-980 
    Details
    ISSN: 1573-5060
    Keywords: Capsicum annuum ; sweet pepper ; Trialeurodes vaporariorum ; glasshouse whitefly ; cultivars ; resistance
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Fourteen cultivars, one F1-hybrid and one half-wild type (Cind) of sweet pepper were tested on resistance to glasshouse whitefly. Several mutually significant levels of resistance were found. Most resistant appeared to be ‘California Wonder’, ‘Severka M’, ‘Korál’ and ‘Yolo Wonder’. During the test sweet pepper plants were infested both with whiteflies and their parasite — Encarsia formosa, which caused the blackening of whitefly puparia. The blackened puparia are easily seen, enabling an easier and more rapid evaluation of the number of puparia present.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00039238
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  • 9
    Electronic Resource
    Electronic Resource
    The use of an evolutionary scheme for cauliflowers in the screening of genetic resources (1982)
    Springer
    Euphytica 31 (1982), S. 725-734 
    Details
    ISSN: 1573-5060
    Keywords: Brassica oleracea var. ; botrytis ; cauliflower ; evolution ; resistance ; Plasmodiophora brassicae ; clubroot ; Delia radicum ; cabbage root fly ; genetic resources
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary A hypothetical scheme is given for the evolution of the different types of cauliflower (Brassica oleracea var. botrytis L.). This has been useful in identifying sources of reduced susceptibility to cabbage root fly (Delia radicum (L.)), and may also be useful in the search for reduced susceptibility to clubroot (Plasmodiophora brassicae Woron.). It is argued that knowledge of the phylogeny of types within each crop species is of great importance in the exploitation of genetic resources.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00039211
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  • 10
    Electronic Resource
    Electronic Resource
    Breeding for resistance to yellow disease of hyacinths. II. Influence of flowering time, leaf characters, stomata and chromosome number on the degree of resistance (1982)
    Springer
    Euphytica 31 (1982), S. 621-628 
    Details
    ISSN: 1573-5060
    Keywords: Hyacinthus orientalis ; hyacinth ; Xanthomonas hyacinthi ; yellow disease ; resistance ; general combining ability ; flowering date ; leaf characters ; stomata ; correlation coefficients
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Analysis of an incomplete diallel design with 14 hyacinth cultivars and 4 wild accessions of Hyacinthus orientalis showed a significant GCA component for resistance to yellow disease. The late flowering hyacinth cultivars ‘King of the Blues’ and ‘Marconi’ and the early flowering Hyacinthus orientalis 70129 were found to be the best combiners for yellow disease resistance. Within a cultivar, the degree of earliness itself was not associated with the degree of resistance. Correlation coefficients of leaf characters and degree of resistance showed that hyacinths with short and/or narrow leaves are generally more resistant than those with long and/or broad leaves. Tetraploid cultivars with few, large stomata tend to be susceptible, diploid ones with many small stomata tend to be the more resistant.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00039200
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  • 11
    Electronic Resource
    Electronic Resource
    Resistance to wilt in chickpea. I. Inheritance of late-wilting in response to race 1 (1983)
    Springer
    Euphytica 32 (1983), S. 447-452 
    Details
    ISSN: 1573-5060
    Keywords: Cicer arietinum L. ; early-wilting ; Fusarium oxysporum f.sp. ciceris ; late-wilting ; resistance
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Differences in time of wilting of chickpea (Cicer arietinum L.) in response to Race 1 of Fusarium oxysporum f.sp. ciceris, are confirmed. C-104 wilts later than JG-62 and the difference in time of wilting appears to be inherited as a single gene with early wilting partially dominant to late wilting. Considered in relation to earlier studies, the observations indicate that at least two genes are involved in the inheritance of resistance in chickpea to Race 1 and offer an explanation for previous difficulties in interpreting the inheritance of resistance.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00021454
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  • 12
    Electronic Resource
    Electronic Resource
    Selection for resistance to Septoria nodorum in wheat (1980)
    Springer
    Euphytica 29 (1980), S. 337-346 
    Details
    ISSN: 1573-5060
    Keywords: Triticum aestivum ; wheat ; Septoria nodorum ; Leptosphaeria nodorum ; glume blotch ; resistance ; tolerance ; escape ; selection ; selection indexes ; phenotypic correlations ; genotypic correlations ; heritability ; grain yield ; heading date ; plant height ; seed weight ; seed weight %
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary A population of 572 F2 derived F3 lines from six crosses were used to estimate parameters relevant to selection for resistance to Septoria nodorum of wheat. Lines were grown in disease free (fungicide sprayed) and inoculated microplots in 2 replications of a split-plot design in a single environment in 1977. Average yield reduction due to disease was approximately 50%; this was associated with an average septoria score of 50% on the flag leaf, an average septoria score of 42% on the head, and a reduction of 37% in seed weight. Low S. nodorum scores were correlated with late heading date, tall plant height, high grain yield, and high seed weight in diseased plots, and high seed weight % (seed weight in diseased plots expressed as a percentage of seed weight in fungicide sprayed plots). Restricted selection indexes were used to study the relative contributions of disease escape, true resistance, and tolerance to variability in grain yield in diseased plots, seed weight in diseased plots, and seed weight %. True resistance appeared to be the most important factor causing variation in grain yield in diseased plots and seed weight %. Tolerance and escape seemed to be more important for seed weight in diseased plots. Heritabilities of S. nodorum scores on the flag leaf and head were 63% and 52%, respectively. Leaf and head scores could be used most effectively as selection criteria to upgrade resistance in a population before harvest. Selection for high seed weight % slightly reduced yields in disease free plots, although yield in diseased plots and seed weight in diseased plots were increased. However, selection for increased yield or increased seed weight in diseased plots improved yield in disease free plots. It is suggested that direct selection for yield or seed weight in diseased plots is likely to achieve more desirable goals than selection for seed weight %.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00025132
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  • 13
    Electronic Resource
    Electronic Resource
    The production of alien monosomic additions in Beta vulgaris as a source for the introgression of resistance to beet root nematode (Heterodera schachtii) from Beta species of the section Patellares (1982)
    Springer
    Euphytica 31 (1982), S. 313-323 
    Details
    ISSN: 1573-5060
    Keywords: Beta vulgaris ; cultivated beet ; wild Beta species ; resistance ; Heterodera schachtii ; beet root nematode ; interspecific hybridization ; alloploidy ; alien chromosome addition
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Experiments were carried out for adding the chromosome carrying resistance to beet root nematode (Heterodera schachtii) from the wild Beta species of the section Patellares (B. procumbens, B. webbiana and B. patellaris) to the genome of B. vulgaris. Preliminary experiments indicated that crosses between the wild species and B. vulgaris cultivars of the mangold type yielded on average more viable F1 hybrids than crosses with sugar and fodderbeet. However, crossability varied strongly between individual parental combinations. It was concluded that most types of B. vulgaris can be hybridized with the wild species of the section Patellares if a sufficient number of pair-crosses is made. Crosses between diploid cultivars or species of the section Vulgares and diploid wild species of the section Patellares yielded many hybrids which, however, were highly sterile. From crosses between tetraploid B. vulgaris and the wild species a great number of viable allotriploid and allotetraploid hybrids was obtained. In the backcross progenies of allotriploid hybrids 26% alien monosomic additions occurred, of which 4.1% carried the resistance bearing chromosome of B. procumbens or B. patellaris. The programme will be continued by sereening progenies of the resistant monosomic addition plants for the occurrence of resistant disomic introgression products.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00021646
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  • 14
    Electronic Resource
    Electronic Resource
    Inheritance of resistance to Didymella lycopersici Klebb. in tomato (Lycopersicon Mill.) (1982)
    Springer
    Euphytica 31 (1982), S. 981-989 
    Details
    ISSN: 1573-5060
    Keywords: Lycopersicon ; tomato ; Didymella lycopersici ; foot- and stemrot ; resistance ; interspecific crosses
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The inheritance of the resistance to Didymella lycopersici was studied on F3- and Bc1⊗-lines from interspecific crosses of L. esculentum with L. hirsutum and with L. hirsutum glabratum. The resistance is not monogenic and is inherited in dominant fashion. The high h2 values based on line means offer possibilities to seleet efficiently for enhanced levels of resistance.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00039239
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  • 15
    Electronic Resource
    Electronic Resource
    Inheritance of resistance to foot and root rot caused by Phytophthora nicotianae v. Breda de Haan var. nicotianae in tomato (Lycopersicon Mill.). (1983)
    Springer
    Euphytica 32 (1983), S. 103-109 
    Details
    ISSN: 1573-5060
    Keywords: Lycopersicon ; tomato ; Phytophthora nicotianae var.nicotianae ; foot and root rot ; resistance
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Different levels of resistance to foot and root rot caused by P. nicotianae var. nicotianae were found, with the highest level in four American lines. The resistance of these lines depends on one incompletely dominant major gene.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00036869
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  • 16
    Electronic Resource
    Electronic Resource
    Breeding for resistance to Fusarium oxysporum F. SP. Tulipae in tulip (Tulipa L.). 3. genotypic evaluation of cultivars and effectiveness of pre-selection (1983)
    Springer
    Euphytica 32 (1983), S. 505-510 
    Details
    ISSN: 1573-5060
    Keywords: Tulipa ; tulip ; Fusarium oxysporum ; Fusarium bulbrot ; resistance ; pre-selection
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary In this third paper results are given regarding the resistance in adult bulbs of progenies from the incomplete diallel cross of cultivars described in paper 2. It appeared that the resistance in adult bulbs corresponded with the resistance found earlier in juvenile bulbs. Both for juvenile and adult progenies, resistance proved to be mainly determined by additive gene action; GCA's of individual parents of the adult progenies showed good agreement with those found for juvenile ones, indicating that early selection for Fusarium resistance is very effective.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00021462
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  • 17
    Electronic Resource
    Electronic Resource
    Resistance to wilt in chickpea. II. Further evidence for two genes for resistance to race 1 (1983)
    Springer
    Euphytica 32 (1983), S. 749-755 
    Details
    ISSN: 1573-5060
    Keywords: Cicer arietinum ; chickpea ; early-wilting ; Fusarium oxysporum f.sp. ciceris ; late-wilting ; resistance
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Tests of parents and F1, F2 and F3 generations of crosses of JG-62 (early-rilting) and C-104 (late-wilting) with resistant cultivars provide further evidence that resistance in chickpea (Cicer arietinum L.) to Race 1 of Fusarium oxysporum f.sp. ciceris is controlled by at least two genes, both of which must be present in homozygous recessive form for complete resistance. Singly, one of the genes delays wilting, as in C.104. The second has not yet been isolated but crosses of resistant parents with JG-62 suggest that it operates in similar fashion.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00042155
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  • 18
    Electronic Resource
    Electronic Resource
    Selection of potato cyst-nematodes on resistant Solanum vernei hybrids (1983)
    Springer
    Euphytica 32 (1983), S. 911-917 
    Details
    ISSN: 1573-5060
    Keywords: Potatoes ; Solanum vernei ; potato cyst-nematodes ; Globodera rostochiensis ; G. pallida ; resistance ; virulence ; major genes ; pathotypes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Selection of potato cyst-nematode populations of several pathotypes on resistant Solanum vernei hybrids resulted in increased virulence in some populations. This increase is believed to be due to the selection of specific virulence genes in each population gene pool. Resistance based on S. vernei is race specific and its life in the field will probably be finite. Populations of Globodera pallida are conventionally classified into different pathotypes according to their response on resistant test plants. However, populations of the same pathotype did not all behave identically. Such variation of virulence within a pathotype suggests different complements and frequencies of genes for virulence. Many field populations may not fit simply into the current pathotype scheme but no alternative is at present available.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00042173
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  • 19
    Electronic Resource
    Electronic Resource
    Inheritance of zucchini yellow mosaic virus resistance in Cucumis melo L. (1984)
    Springer
    Euphytica 33 (1984), S. 57-61 
    Details
    ISSN: 1573-5060
    Keywords: Cucumis melo ; muskmelon ; resistance ; zucchini yellow mosaic virus ; genetics ; linkage
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Resistance to zucchini yellow mosaic virus has been found in the muskmelon line ‘PI 414723’ from India. This resistance is effective against the ZYMV strains E15 and 1318 belonging respectively to the NF and F pathotypes. Resistance to E15 (no vein clearing and yellowing symptoms) is governed by one dominant gene (symbol Zym) according to segregations observed in F1, F2 and BC1 progenies. This gene is epistatic dominant over Fn, which induces wilting and necrosis after inoculation with F pathotype. Linkage studies suggest that Zym inherits independently from Fom-1, Fom-2, Vat, Wmv and Fn but is linked with a (13.1 ±2.4 units).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00022750
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  • 20
    Electronic Resource
    Electronic Resource
    Evaluating resistance of barley breeding lines to scald in field plots (1984)
    Springer
    Euphytica 33 (1984), S. 897-901 
    Details
    ISSN: 1573-5060
    Keywords: Hordeum vulgare ; barley ; Rhynchosporium secalis ; scald ; field reaction ; resistance
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary A 0–4 scoring system to quantify scald (Rhynchosporium secalis) infection is suggested. Scores 1, 2, 3 and 4 allocated to represent 1/4, 1/2, 3/4 and 4/4 of the crop canopy scalded are easy to comprehend and intermediate scores e.g. 0.5, 1.5, 2.5 and 3.5 give it the breadth of a quantitative scale. Scores on a large number of lines showed a high degree of repeatability and were found to be highly correlated with the log transformed values of the actual leaf area damage. Although it was suggested that predictions of leaf area damage at scores 3–4 should be applied with caution, broad generalization of the scores in discriminating the amount of disease were shown to be soundly based and offered plant breeders a tool to standardize the evaluation of scald resistance in field plots on a large scale with this quick and reliable scoring system.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00021918
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  • 21
    Electronic Resource
    Electronic Resource
    6. Variation for incomplete resistance to Hemileia vastatrix in Coffea arabica (1983)
    Springer
    Euphytica 32 (1983), S. 625-637 
    Details
    ISSN: 1573-5060
    Keywords: Coffee leaf rust ; Coffea arabica ; coffee ; Hemileia vastatrix ; resistance ; components of resistance ; leaf retention period ; yield
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Variation for incomplete resistance to coffee leaf rust was studied in Coffea arabica. Disease level in the field was scored by a 0 to 9 scale. Components of resistance observed in laboratory and greenhouse tests were latency period (LP), lesion density (LD) and leaf retention period (LRP). LRP determines the duration of sporulation. Lines of ‘Mundo Novo’ and ‘Catuai’ showed relatively small but significant differences for disease level in the field. Heritibility was low (0.31) and part of the variance (34%) was explainable by a significant correlation between disease level and yielding capacity of the lines. The high susceptibility of ‘Ibaarê’, in comparison to other cultivars, was best explained by longer LRP values for ‘Ibaarê’. Also its LP was generally shorter than that of other cultivars. Among coffee accessions from Ethiopia great variation was observed for disease level in the field. A significant part of the variance (35%) was explained by differences in yielding capacity. Variation for resistance components was observed between accessions, tested in the greenhouse and laboratory. However, results of the two tests were inconsistent. Transgressive segragation for incomplete resistance was observed in F2 populations of the cross between Agaro C1164–19 and ‘Catuai’, tested in the laboratory and greenhouse. Resistance was expressed by a longer LP, a lower LD, a certain percentage of non-sporulating lesions and, in some populations, by early necrosis of lesions. Prospects for breeding for incomplete resistance to H. vastatrix in C. arabica are discussed. Factors which may hamper selection progress are: a) the positive correlation between yield and disease level in the field, b) the relative small genetic variation for incomplete resistance among C. arabica cultivars and productive breeding lines, and c) inconsistency of results between resistance tests.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00021476
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  • 22
    Electronic Resource
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    8. Characterization of incomplete resistance to Hemileia vastatrix in the icatu coffee population (1983)
    Springer
    Euphytica 32 (1983), S. 649-657 
    Details
    ISSN: 1573-5060
    Keywords: Coffea spp. ; coffee ; coffee leaf rust ; Hemileia vastatrix ; resistance ; heterogeneous reaction type
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Incomplete resistance of the hybrid coffee population Icatu to race II of coffee leaf rust (Hemileia vastatrix) was studied in the field, greenhouse and laboratory. The resistance components observed were: latency period (LP), lesion density (LD), sporulating lesion density (LSD) and relative sporulation lesion efficiency (RSLE=100. SLD/LD). RSLE is an indicator for the heterogeneity of the reaction. Disease score in the field was highly correlated with RSLE, less with LP and SLD, and not with LD. LP was highly correlated with RSLE. A new rust race (Is. 2), isolated in the field from Icatu in 1979, was more virulent than race II on some resistant, moderately resistant or moderately susceptible genotypes. This indicates that incomplete resistance, at different levels, can be race specific. Resistance was affected by leaf age and light intensity. Inheritance studies suggest that incomplete resistance in Icatu might be related to major genes, the effectiveness of which may depend on gene dose and genetic background. It is concluded that selection for incomplete resistance to coffee leaf rust in Icatu may not lead to durable resistance.
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    URL: http://dx.doi.org/10.1007/BF00021478
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    Barley yellow dwarf virus resistance in the genus Avena (1984)
    Springer
    Euphytica 33 (1984), S. 49-55 
    Details
    ISSN: 1573-5060
    Keywords: Avena ; BYDV ; barley yellow dwarf ; resistance
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The barley yellow dwarf virus resistance level was evaluated in acessions of most species of the genus Avena. Highest levels of resistance were found in A. sterilis and A. occidentalis. High resistance levels were also found in A. barbata, A. fatua, A. hybrida, A. macrostachya, diploid A. nuda and A. strigosa. Results are discussed in relation to breeding for resistance.
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    URL: http://dx.doi.org/10.1007/BF00022749
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    Resistance of Triticum dicoccoides to infection with Erysiphe graminis tritici (1984)
    Springer
    Euphytica 33 (1984), S. 41-47 
    Details
    ISSN: 1573-5060
    Keywords: Truticum dicoccoides ; wild emmer wheat ; Erysiphe graminis tritici ; powdery mildew ; resistance ; Israel ; germplasm ; wheat ; collection
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The reactions of 233 Triticum dicoccoides acessions, collected at 10 sites in Israel and elsewhere, to infection with cultures of Erysiphe graminis tritici, were determined. The reactions indicated that the number of sources of resistance to E. graminis tritici which can be obtained from T. dicoccoides plants growing wild in Israel and elsewhere is almost unlimited. One hundred and fourteen or 49% of the accessions were resistant, and 137 or 59% of the accessions were resistant or moderately resistant to infection with four cultures of E. graminis tritici which possess the virulence genes corresponding to most of the identified resistance genes in wheat. Accessions collected at sites with marginal habitats where T. dicoccoides grows poorly and has lower grain weight, were more susceptible than were accessions collected at sites with an optimal habitat for growth of T. dicoccoides. The results agreed with those in a previous study with Hordeum spontaneum, and indicate that to obtain H. spontaneum or T. dicoccoides accessions with the highest level of resistance to the powdery mildew pathogens, plants should be collected at sites in ecological and geographic regions where those two species occupy optimum habitats and are exposed to the powdery mildew pathogens.
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    URL: http://dx.doi.org/10.1007/BF00022748
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  • 25
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    Inheritance of resistance to Botrytis cinerea and Didymella applanata in canes of Rubus idaeus, and relationships between these resistances (1983)
    Springer
    Euphytica 32 (1983), S. 895-901 
    Details
    ISSN: 1573-5060
    Keywords: Rubus idaeus ; red raspberry ; Botrytis cinerea ; Didymella applanata ; inheritance ; resistance ; spur blight ; Rubus coreanus ; Rubus pileatus ; Rubus occidentalis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The inheritance of resistance to Botrytis cinerea and Didymella applanata was studied both in a half diallel cross which involved resistant parents derived from red raspberry cv. Chief and a third backcross hybrid of Rubus occidentalis, and in backcrosses to raspberry of R. pileatus and R. coreanus hybrids. Resistances in the diallel were inherited additively with no interactions. The levels of resistance in the backcrosses were much higher than in the diallel and indicated good prospects for obtaining cultivars with very high levels of resistance. The resistances to the two diseases were highly correlated in progenies derived from each resistance source and, with the possible exception of resistance derived from R. coreanus, there was no evidence that resistance to one disease segregated independently of resistance to the other.
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    URL: http://dx.doi.org/10.1007/BF00042171
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  • 26
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    Genetics of resistance to cotton jassid, Amrasca biguttula biguttula (Ishida) in okra (1984)
    Springer
    Euphytica 33 (1984), S. 215-220 
    Details
    ISSN: 1573-5060
    Keywords: Abelmoschus esculentus ; okra ; Amrasca biguttula biguttula ; jassid ; resistance ; gene effects
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The resistance to cotton jassid in okra was found controlled by dominant genes. Both additive and dominance gene effects were significant but both additive gene effects and dominance x dominance type of interactions appear to be more important than other effects. The former could be exploited for developing genotypes resistant to jassids in okra.
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    URL: http://dx.doi.org/10.1007/BF00022768
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  • 27
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    Components of resistance to ryegrass mosaic virus in a clone of Lolium perenne and their strain-specificity (1984)
    Springer
    Euphytica 33 (1984), S. 411-417 
    Details
    ISSN: 1573-5060
    Keywords: Lolium perenne ; perennial ryegrass ; ryegrass mosaic virus ; resistance ; virus strains
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The extreme resistance to ryegrass mosaic virus (RMV) of a clone of Lolium perenne L. was due to a combination of two distinct types of resistance: resistance to infection and resistance to multiplication and movement of virus within the plant. Resistance to infection was quantitatively inherited and highly effective against three strains of RMV, while resistance to multiplication and movement was controlled by two complementary recessive genes and was effective against only two of the three RMV strains.
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    URL: http://dx.doi.org/10.1007/BF00021138
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  • 28
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    The physiology of vesicular-arbuscular mycorrhizal roots (1983)
    Springer
    Plant and soil 71 (1983), S. 197-209 
    Details
    ISSN: 1573-5036
    Keywords: Carbohydrate ; Disease ; resistance ; Hormones ; Micronutrients ; Phosphate ; Physiology ; VA mycorrhizae ; Water uptake
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The fungi of vesicular-arbuscular mycorrhizae colonize considerable portions of the root system and in spite of the carbon drain they impose on the host plant, their presence within the root tissues can positively influence several aspects of the host plant's physiology. In the majority of cases, improved phosphate uptake is the primary cause of growth and yield enhancements in the mycorrhizal plants. Mycorrhizal roots have different phosphate absorption kinetics and lower threshold values than nonmycorrhizal roots. The external hyphae developing around mycorrhizae explore a large volume of soil and absorb available phosphate beyond the depletion zone at the root surface. Phosphate accumulating in the external fungal hyphae is translocated to the internal mycelium by a well-developed transport system and transferred to the host tissues mainly across the intracellular arbuscules. Certain specialized enzyme activities are specifically associated with this alternative pathway of phosphate nutrition in mycorrhizal plants. Improved phosphate nutrition is not always sufficient to explain the observed effects of vesicular-arbuscular mycorrhizae on the host plant's physiology.
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    URL: http://dx.doi.org/10.1007/BF02182655
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    Inheritance of resistance to angular leaf spot (Isariopsis griseola Sacc.) in french bean (Phaseolus vulgaris L.) (1980)
    Springer
    Euphytica 29 (1980), S. 175-176 
    Details
    ISSN: 1573-5060
    Keywords: Phaseolus vulgaris ; French bean ; Phaseolus coccineus ; runner bean ; Isariopsis griseola ; angular leaf spot ; resistance
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Angular leaf spot (Isariopsis griseola Sacc.) is a serious disease of French bean in the hills of India and 40 to 70 per cent of the green pods are damaged and rendered unmarketable. Crosses were made between PLB 257, (Phaseolus coccineus L.), a red flowering pole tope, resistant to angular leaf spot, and Contender (Phaseolus vulgaris L.), a highly susceptible commercial cultivar. Studies of the F1, F2, and F3 progenies indicated that PLB 257, carries a recessive gene imparting resistance to angular leaf spot.
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    URL: http://dx.doi.org/10.1007/BF00037264
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    The breeding values of potato parents for field resistance to late blight measured by whole seedlings (1980)
    Springer
    Euphytica 29 (1980), S. 489-495 
    Details
    ISSN: 1573-5060
    Keywords: Potato ; Phytophthora infestans ; late blight ; resistance ; general combining ability (GCA) ; specific combining ability (SCA) ; multiple mating scheme ; North Carolina Experiment II design
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Parents used in a potato breeding programme were intercrossed in a multiple mating scheme. The resulting progenies were assessed for resistance to late blight, using as criteria the size and frequencies of lesions on leaves, on petioles and on stems, and an overall score. Analysis of variance showed that all the statistically significant genetic variation was attributable to general combining ability (GCA) differences. The seven variates were highly correlated.
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    URL: http://dx.doi.org/10.1007/BF00025150
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    An association between resistance to root aphid (Pemphigus bursarius L.) and downy mildew (Bremia lactucae Regel) in lettuce (1980)
    Springer
    Euphytica 29 (1980), S. 483-488 
    Details
    ISSN: 1573-5060
    Keywords: Lactuca sativa ; lettuce ; Pemphigus bursarius ; root aphid ; Bremia lactucae ; downy mildew ; resistance
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Many lettuce cultivars (Lactuca sativa L.) with high resistance to lettuce root aphid (Pemphigus bursarius L.) also carried the gene Dm-6 for specific resistance to downy mildew (Bremia lactucae Regel). This suggests the possibility of linkage between this gene and root aphid resistance. The origin of this association is discussed.
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    URL: http://dx.doi.org/10.1007/BF00025149
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  • 32
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    Ribes glutinosum and R. Sanguineum as donors of resistance to American gooseberry mildew in black currant breeding (1981)
    Springer
    Euphytica 30 (1981), S. 197-202 
    Details
    ISSN: 1573-5060
    Keywords: Ribes glutinosum ; R. sanguineum ; donors ; resistance ; Sphaerotheca mors-uvae ; American gooseberry mildew ; black currant ; breeding
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary A major dominant resistance gene Sph 3 has been transferred from Ribes ‘carrierei’ (R. glutinosum albidum × R. nigrum) to black currants of commercial promise by backcrossing repeatedly to R.nigrum. Probable causes of the almost invariable deficit of resistant plants in segregating progenies are briefly discussed. Response of young seedlings to mildew in the glasshouse was very highly correlated with their field response as mature plants.
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    URL: http://dx.doi.org/10.1007/BF00033678
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    The location and characteristics of novel sources of resistance to Bremia Lactucae Regel (downy mildew) in wild Lactuca L. Species (1981)
    Springer
    Euphytica 30 (1981), S. 659-668 
    Details
    ISSN: 1573-5060
    Keywords: Bremia lactucae ; downy mildew ; Lactuca species ; lettuce ; resistance ; physiologic races
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Twenty-one accessions of 3 wild Lactuca species which could be hybridised with L. sativa, the cultivated lettuce, were inoculated at different stages of plant development with 3 multivirulent isolates of Bremia lactucae. Nineteen sources of resistance to B. lactucae, not attributable to the previously recognised resistance factors 1–11 were identified. Two lines of L. serriola showed similar resistance patterns as lines carrying R11. The resistance of some accession was incomplete particularly at the seedling stage and this phenomenon may be race specific. Tests on segregating F2 populations of crosses between 2 different L. serriola accessions and L. sativa cultivars showed that the resistance in one line (LSE/18) appears to be inherited as a single dominant gene, which is sometimes incomplete in expression and allelic to either Dm6 or R7. The segregation patterns for resistance in PI 281876 did not give readily interpretable ratios. To assess the frequency of occurrence in B. lactucae populations of virulence factors to overcome this novel resistance, 11 of the novel sources of resistance were inoculated with numerous collections of the pathogen from the UK, Czechoslovakia and elsewhere and found to show a high level of resistance.
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    Resistance of lettuce (Lactuca) to the leaf aphid Nasonovia ribis nigri. 1. Transfer of resistance from L. virosa to L. sativa by interspecific crosses and selection of resistant breeding lines (1982)
    Springer
    Euphytica 31 (1982), S. 291-299 
    Details
    ISSN: 1573-5060
    Keywords: Lactuca ; lettuce ; interspecific crosses ; leaf aphids ; Nasonovia ribis nigri ; resistance
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Interspecific crosses were carried out between the three Lactuca species L. virosa, L. serriola and L. sativa to transfer resistance to the leaf aphid Nasonovia ribis nigri from L. virosa to the cultivated lettuce. L. sativa, L. serriola was used as an intermediate parent between the other two species. Many irregularities were observed in the interspecific hybrids, ranging from premature dying of F1 plants resulting from a kind of bastard necrosis till complete male and female sterility and deviating microsporogenesis. Using in vitro culture and after several backcrosses male and female fertile plants were obtained with a L. sativa habit and with resistance to the leaf aphid.
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    Occurrence of pathogenesis-related (b) and similar proteins in different plant species (1983)
    Springer
    European journal of plant pathology 89 (1983), S. 245-254 
    Details
    ISSN: 1573-8469
    Keywords: pathogenesis ; stress ; resistance
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The main properties of ‘pathogenesis-related’ proteins induced inNicotiana species during hypersensitive reactions to different pathogens, as well as by chemical or physical treatments, are listed. These properties are compared with those of similar protein compounds occurring in other plant species in similar circumstances. The plants include cucumber, cowpea,Gomphrena globosa kidney bean,Gynura aurantiaca, tomato, potato, citron and celery. Similarities with other proteins normally occurring in plants, such as proteinase inhibitors, are considered. Analogies and differences with proteins induced in plants by environmental stresses, and with the ‘antiviral factors’ and the ‘inhibitor of viral replication’ occurring inNicotiana species are briefly discussed.
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    URL: http://dx.doi.org/10.1007/BF01995259
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    Resistance of Capsicum species to tobacco, tomato and pepper strains of tobacco mosaic virus (1982)
    Springer
    European journal of plant pathology 88 (1982), S. 163-170 
    Details
    ISSN: 1573-8469
    Keywords: TMV strains ; pathogenicity ; resistance ; hypersensitivity ; susceptibility
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Description / Table of Contents: Samenvatting Om verschillen in pathogeniteit tussen twee in Nederland voorkomende paprikastammen van het TMV nader vast te stellen, werd een aantalCapsicum-herkomsten, waaronder negen soorten, op resistentie getoetst. Hierbij werden de representatieve paprika-isolaten P 11 en P 8 vergeleken met de uit tomaat afkomstige isolaten MA en SPS als vertegenwoordigers van respectievelijk de tabaks- en tomatestam van het TMV. Bij het beoordelen van de symptomen duidden lokale, necrotische vlekken en afvallen van geïnoculeerde bladeren op resistentie, systemische necrosen of mozaïeksymptomen op vatbaarheid. In deze symptomen kwamen tussen de gebruikte stammen verschillen in virulentie tot uitdrukking. Er werden echter vooral verschillen in agressiviteit waargenomen met betrekking tot zowel afzonderlijke, voor resistentie uitsplitsende,Capsicum-herkomsten als het totale aantal getoetste herkomsten. Van de ruim 73 herkomsten waren er 58 resistent tegen MA en SPS, 31 daarvan tegen P 11, maar slechts vijf daarvan tegen P 8. Deze resistentie tegen P 8 werd gevonden inC. chinense.
    Notes: Abstract A number ofCapsicum accessions including nine species were tested for resistance to TMV based on hypersensitivity. The tobacco strain MA and the tomato strain SPS, which were both isolated from tomato, and two pathogenically distinct pepper strains P 11 and P 8, were used. Of the 73Capsicum accessions tested 58 were resistant to MA and SPS, 31 were resistant to P 11 and five were resistant to P 8.
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    The genetic and molecular basis of b-proteins in the genus Nicotiana (1983)
    Springer
    European journal of plant pathology 89 (1983), S. 275-281 
    Details
    ISSN: 1573-8469
    Keywords: interspecific and intraspecific hybrids ; grafting experiments ; N gene ; resistance ; temperature effects
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Screening for the pathogenesis-related (b) protein patterns of 11Nicotiana species and 30N. tabacum varieties has revealed both inter- and intraspecific variability and 7 different b-proteins (b0, b1, b1′, b1″, b2, b3 and b4) have been clearly defined. Their genetic determinants are sexually transmitted independently of theN gene conferring resistance to TMV, and a monogenic inheritance has been demonstrated for one of them (b1′). Grafting experiments have revealed the existence of a species-aspecific ‘mobile compound’ responsible for the expression of the b-protein genes, the production of which is probably under the control of theN gene. Among the 5 intraspecific and 6 interspecific hybrids studied, one of them, theN. glutinosa x N. debneyi together with its amphidiploid, synthesizes b-protein (b1″) in a constituve way and possesses a high level of resistance to necrosis-inducing viruses. The amphidiploid is able to transfer these two properties to otherNicotianae not only by crossing but also by grafting; it therefore appears to permanently synthesize the ‘mobile compounds’. Furthermore, the hypersensitive reaction to TMV in these hybrids is only completely broken down at 35 °C, whereas this normally occurs at 30 °C in plants with theN gene.
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    URL: http://dx.doi.org/10.1007/BF01995262
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    Solanum berthaultii P.I. 265858; a possible source of protection against all strains of PVX (1982)
    Springer
    Potato research 25 (1982), S. 127-130 
    Details
    ISSN: 1871-4528
    Keywords: potato ; virus breeding ; resistance
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary A clone ofSolanum berthaultii P.I. 265858 was not systemically infected when manually inoculated with isolates of PVX groups 1 to 3 but developed top-necrosis when grafted-inoculated, demonstrating it is hypersensitive. Plants sap- or graft-inoculated with an isolated of PVX group 4 or with PVXHB (a recently-discovered strain overcoming all reported sources of resistance to PVX) were infected systematically. The plants were extremely sensitive to these isolates, young leaves becoming necrotic and the plant dying within a few weeks and, whilst still alive, plants contained little virus and were a poor source of infection. These characteristics suggest that this clone could provide a means of breeding cultivars that would be protected against all known strains of PVX.
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    URL: http://dx.doi.org/10.1007/BF02357281
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    Differential interaction between two potato cultivars and two isolates ofPhoma exigua var.foveata (1981)
    Springer
    Potato research 24 (1981), S. 89-92 
    Details
    ISSN: 1871-4528
    Keywords: gangrene ; host specificity ; resistance
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary In experiments carried out over two years at two sites, a differential interaction between two potato varieties and two isolates ofP. exigua var.foveata was demonstrated in the cortical tissue.
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    URL: http://dx.doi.org/10.1007/BF02362019
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