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  • 1
    Electronic Resource
    Electronic Resource
    Inheritance of Resistance to Pseudomonas solanacearum E. F. Smith in Tetraploid Potato (1993)
    Oxford, UK : Blackwell Publishing Ltd
    Plant breeding 111 (1993), S. 0 
    Details
    ISSN: 1439-0523
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Inheritance of bacterial wilt resistance in tetraploid potato was investigated in segregating progenies of parent clones with resistance derived from different specific sources and different types of adaptation. A race 1 and a race 3 isolate of Pseudomonas solanacearum were used to test the resistance under warm temperatures. Results obtained indicated partial dominance of resistance. Significant general and specific combining abilities showed that both additive and non-additive gene actions are important in conditioning resistance expression. There was evidence that epistasis is an important component of the non-additive gene action in the inheritance of resistance. Other aspects of the resistance and implications for breeding are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1439-0523.1993.tb00603.x
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  • 2
    Electronic Resource
    Electronic Resource
    A new look at incompatibility relationships in higher plants (1993)
    Springer
    Sexual plant reproduction 6 (1993), S. 183-190 
    Details
    ISSN: 1432-2145
    Keywords: Gametophytic incompatibility ; Self-incom-patibility ; Unilateral interspecific incompatibility ; Potato (Solanum) species
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Pollen tube growth was evaluated using an 18-step scale after both intra- and interspecific pollinations of genotypically widely differing diploid potato species and potato dihaploids expressing monofactorial gametophytic incompatibility. The results obtained account for a wide array of types of pollen tube growth resulting from crossing partners with distinct incompatibility behavior. Based on the assumption that inhibition of pollen tubes is the rule and solely prevented by the pollen itself, a model proposing one common cause underlying different mechanisms for both intraspecific selfincompatibility and interspecific incompatibility in diploids is put forward. Data supporting the model are presented from the experimental results of this study and from the literature. The strength of pollen-style interaction depends on particular S-alleles in combination with recognition and activity properties of the basic S-genotypes. The model is suitable to explain all former observations on incompatibility in diploids with a gametophytic system of incompatibility and, with modifications of the manner of phenotypic expression, also in plants with sporophytic incompatibility. The proposed scheme of pollen tube growth phenotypes permits prediction of pollen tube growth behavior in an intended cross combination. The model is based on both classical Mendelian genetics and recent molecular genetic insight.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00228647
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  • 3
    Electronic Resource
    Electronic Resource
    The breeding of the cultivated potato species solanum x juzepczukii and S. x curtilobum II. The resynthesis of S. x juzepczukii and S. x curtilobum (1982)
    Springer
    Euphytica 31 (1982), S. 695-708 
    Details
    ISSN: 1573-5060
    Keywords: Solanum juzepczukii ; Solanum curtilobum ; Solanum goniocalyx ; S. tuberosum spp. andigena ; Solanum acaule ; cultivated potato ; wild potato ; slab electrophoresis ; evolutionary pathways ; synthetic hybrids ; frost resistance breeding
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The possibility of combining anew the genomes of wild and cultivated progenitors of triploid S. x juzepczukii and pentaploid S. x curtilobum by following the known evolutionary pathway of these species was investigated. The resynthesis of S. x juzepczukii was easy, and a wide range of synthetic forms was bred. Among these were forms with higher frost resistance (-5°C) than has been found in natural S. x juzepczukii. The total tuber glycoalkaloid content of several synthetic hybrids was lower than or as low as that of natural clones. Most synthetic hybrids were more vigorous than natural S. x juzepczukii and produced about the same types of tubers as are found in the natural range of variation. The best diploid parents were found in the species S. goniocalyx. The attempt to resynthesize pentaploid S. x curtilobum has not been successful but tetraploid plants were obtained in the process. An explanation for the occurrence of tetraploids resulting from triploid x tetraploid and/or diploid crosses is offered. The newly bred tetraploids contain at least one genome from S. acaule (possibly two) and hybridize easily with ssp. andigena. They thus provide a means for the transfer of S. acaule germ plasm into the tetraploid cultivated gene pool which would profit from the frost resistance of S. acaule.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00039208
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  • 4
    Electronic Resource
    Electronic Resource
    The importance of wild potato species resistant to the potato cyst nematode, Globodera pallida, pathotypes P4A and P5A, in potato breeding. I. Resistance studies (1988)
    Springer
    Euphytica 37 (1988), S. 9-14 
    Details
    ISSN: 1573-5060
    Keywords: Wild potato species (Solanum spp.) ; Globodera pallida resistance ; potato cyst nematode ; intra- and interspecific hybrids ; inheritance of resistance
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Seven wild diploid potato species, Series Tuberosa, representing 1023 clones were screened for resistance to the potato cyst nematode, Globodera pallida. Over 25% of the clones were resistant to pathotype P4A and almost 30% were resistant to pathotype P5A. The resistance in hybrid progenies of these and other resistant species with cultivated potatoes was evaluated, and over 2200 seedlings were screened. High frequencies of resistance (〉50%) to P4A were found in progenies with Solanum leptophyes, S. vernei, S. gourlayi and S. capsicibaccatum, whereas resistance to P5A was found in these species as well as S. sparsipilum. The importance of nematode resistant wild species for potato breeding is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00037216
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  • 5
    Electronic Resource
    Electronic Resource
    The importance of wild potato species resistant to the potato cyst nematode, Globodera pallida, pathotypes P4A and P5A, in potato breeding. II. The crossability of resistant species (1988)
    Springer
    Euphytica 37 (1988), S. 15-22 
    Details
    ISSN: 1573-5060
    Keywords: Solanum spp. ; wild potato species ; Globodera pallida resistance ; potato cyst nematode ; interspecific hybridisation ; germplasm utilisation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Over 2400 pollinations were made to investigate the crossability relationships between cultivated potatoes, and wild diploid species from Series Tuberosa and Circaeifolia, as well as wild polyploid species in Series Tuberosa and Longipedicellata resistant to potato cyst nematode, Globodera pallida pathotypes P4A and P5A. Wild diploids in Series Tuberosa crossed easily with cultivated diploid species, except with Solanum lignicaule where most pollinations failed, and seed set was extremely low (0.2 seeds per pollination or less). It is suggested that this species is 1EBN. S. capsicibaccatum is clearly isolated from Series Tuberosa, but can form hybrids with S. lignicaule, which can act as a bridging species to S. tuberosum haploids. S. gourlayi and S. oplocense can be crossed with both subspecies of S. tuberosum, but S. papita, Series Longipedicellata is reproductively isolated from the tetraploid cultigens. The crossability data are discussed in the light of germplasm utilisation for breeding potato varieties resistant to potato cyst nematode.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00037217
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  • 6
    Electronic Resource
    Electronic Resource
    The breeding potential of wild potato species resistant to the potato tuber moth, Phthorimaea operculella (Zeller) (1988)
    Springer
    Euphytica 39 (1988), S. 123-132 
    Details
    ISSN: 1573-5060
    Keywords: Solanum spp. wild potato species ; Phthorimaea operculella ; potato tuber moth ; interspecific hybridisation ; resistance studies
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The potato tuber moth, Phthorimaea operculella (Zeller) is an important pest of potatoes in the field and in stores in warm environments throughout the world. In this study genetic resistance to potato tuber moth was identified in clones of Solanum sparsipilum (coded MBN) originally developed for resistance to bacterial wilt and root-knot nematode. Resistance to this pest in S. sucrense and S. tarijense as well as S. sparsipilum was exploited in wide crosses with diploid and tetraploid cultivated potatoes, and haploids derived from S. tuberosum; hybrid progenies were produced. Crosses between resistant S. pinnatisectum or S. commersonii and cultivated potatoes failed completely, although S. commersonii did hybridise with two bridging species S. lignicaule and S. capsicibaccatum which are slightly compatible with cultivated potatoes. Resistance to potato tuber moth was transferred to all progenies except those in which S. tarijense was the resistant parent. The development of potatoes resistant to potato tuber moth is discussed in the context of population breeding for the lowland tropics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00039864
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  • 7
    Electronic Resource
    Electronic Resource
    Breeding of the cultivated potato species Solanum x juzepczukii Buk. and Solanum x curtilobum Juz. etBuk. (1980)
    Springer
    Euphytica 29 (1980), S. 685-704 
    Details
    ISSN: 1573-5060
    Keywords: Solanum juzepczukii ; Solanum curtilobum ; Solanum acaule ; Solanum stenotomum ; cultivated potato ; wild potato ; natural variation ; frost resistance ; proteins ; glycoalkaloids
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary This study investigated the possibility of recombining anew the genomes of the wild and cultivated progenitors of triploid S. juzepczukii and pentaploid S. curtilobum by following the known evolutionary pathway of these two species. Before starting the actual breeding work, the natural variation of S. juzepczukii, S. curtilobum and their wild progenitor S. acaule was studied from the point of view of morphology, quantitative and qualitative tuber glycoalkaloid content and frost resistance. The morphological study was supplemented by a study of the soluble tuber proteins employing polyacrylamide slab-electrophoresis. From 137 accession of S. juzepczukii only 19 morphotypes were identified, 18 of which were also different in their protein spectra. The only red-tubered S. juzepczukii revealed a protein spectrum identical to that of the largest white-tubered group. On phylogenetic grounds, the occurrence of a red-tubered S. juzepczukii cannot be explained. It is concluded that this red clone is a somatic mutant for tuber colour which arose from a whitetubered clone. S. curtilobum was restricted in its variation to just two morphotypes differing only in tuber colour which are, however, identical chemotypes. This would be the case if one of the clones was a somatic mutant for tuber colour from the other one. The glycoalkaloids α-solanine, α-chaconine, tomatine, demissine and α- and β-solamarine are shown to be useful taxonomic characters which confirm earlier hypotheses on the origin of S. juzepczukii and S. curtilobum. Laboratory tests showed the two cultivated species to be resistant to about −3°C whereas S. acaule is resistant to temperatures sometimes below−5°C. The diploid progenitor of S. juzepczukii, S. stenotomum, also has forms resistant to −3°C. The results of this study demonstrate that the proposed breeding scheme is possible.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00023216
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  • 8
    Electronic Resource
    Electronic Resource
    World trends and patterns in the potato crop: An economic and geographic survey (1999)
    Springer
    Potato research 42 (1999), S. 241-264 
    Details
    ISSN: 1871-4528
    Keywords: global distribution ; prospects ; diversification ; specialization ; price risk ; Solanum tuberosum L.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary We examine the changing character of supply and demand for potatoes over time and space with an eye towards implications for agricultural research. Diversification in consumption and specialization in production are our organizing themes. The foundation for comparative analysis is a map of the global distribution of potato growing area. We highlight the adverse impact of price risk on specialization and discuss several sources of uncertainty that condition the size but not the direction of major trends.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02357856
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