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  • 1
    Electronic Resource
    Electronic Resource
    Inheritance of Corolla Size, Number of Stamens and Percentage of Plants with Petaloid Stamens in Evergreen Azaleas (Rhododendron Subsect. obtusa) (1989)
    Oxford, UK : Blackwell Publishing Ltd
    Plant breeding 103 (1989), S. 0 
    Details
    ISSN: 1439-0523
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Research has been carried out on the inheritance of corolla size, number of stamens and percentage of plants with petaloid stamens (double flower) in evergreen azaleas (Rhododendron Subsect. obtusa). For this purpose two incomplete diallel crosses were used. The first one included seven species and one cultivar and the second diallel 13 cultivars. In both diallels for all three characters the GCA mean squares were high. Also, the positive correlation between the parental values and the GCA estimates for flower size and number of stamens indicates that the expression of these characters is mainly determined by additive gene action. A negative correlation was found between GCA estimates for die n number of stamens and the percentage of plants with petaloid stamens. When breeding azaleas with large double flowers, parents can be directly selected on the basis of these characters since additive genetic variance dominates. As no genetic correlations were found between corolla size and number of stamens (percentage of plants with petaloid stamens) the breeding will not be hampered by unfavourable linkage of genes for these characters.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1439-0523.1989.tb00390.x
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  • 2
    Electronic Resource
    Electronic Resource
    Maternal and Genetic Effects on Seed Weight of Tomato, and Effects of Seed Weight on Growth of Genotypes of Tomato (Lycopersicon esculentum Mill.) (1989)
    Oxford, UK : Blackwell Publishing Ltd
    Plant breeding 102 (1989), S. 0 
    Details
    ISSN: 1439-0523
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: A study was made on the inheritance of seed weight of tomato, and on the effect of seed weight on growth of tomato plants. Use was made of 15 parental genotypes and 105 F1s produced by diallel crossing (F1-seeds). From combining ability analysis of variance carried out for weight of F1-seeds it appeared that the weight of seeds harvested from tomato plants was mainly determined by the maternal genotype and largely independent of the genotype of the male parent. A combining ability analysis of variance for weight of seeds produced by seilfing F1's (F2-seeds) showed, however, that female and male parents contributed equally to the inheritance of seed weight and that the inheritance of seed weight is determined mainly by chromosomal additiveiy acting factors, but that also non-additive gene action occurred.Genotypes with large seeds produced heavier seedlings than genotypes with small seeds, In later growth stages, the correlation between seed weight and plant weight became smaller, presumably, due to a lower relative growth rate of the seedlings from large seeds. For this reason, it is doubtful whether breeding of large seeded tomato cultivars opens up prospects of improving growth and yield of tomato plants.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1439-0523.1989.tb00343.x
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  • 3
    Electronic Resource
    Electronic Resource
    Growth analyses of tomato genotypes grown under low night temperatures and low light intensity (1986)
    Springer
    Euphytica 35 (1986), S. 701-715 
    Details
    ISSN: 1573-5060
    Keywords: Lycopersicon esculentum ; tomato ; genotypes ; growth analysis ; MANOVA-procedure ; night temperature ; low light intensity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary In three experiments the growth of 16 genotypes of tomato was examined. The plants were raised in growth rooms at a day temperature of 19°C and night temperatures of 14, 10 or 6°C respectively under a light intensity of 24 Wm-2 visible radiation and a daylength of 8 hours. The results were analysed by a multivariate analysis of variance. Relative growth rate (RGR), leaf area ratio (LAR), specific leaf area (SLA) and leaf weight ratio (LWR) decreased with time. The change in net assimilation rate (NAR) was small. The decrease in RGR was mainly due to the decrease in LAR. RGR, LAR and SLA were lower and LWR slightly higher at lower night temperatures. NAR was hardly affected. The lower RGR at lower night temperatures was mainly due to a lower SLA. Significant differences between genotypes were found in total dry weight, NAR, LAR, SLA and LWR, but hardly in RGR. Significant genotype × temperature interactions occurred. LAR and SLA were positively, NAR and LAR, and NAR and SLA negatively correlated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00028578
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  • 4
    Electronic Resource
    Electronic Resource
    Inheritance of characters determining growth and development of tomato (Lycopersicon esculentum Mill.) under low energy conditions (1987)
    Springer
    Euphytica 36 (1987), S. 205-213 
    Details
    ISSN: 1573-5060
    Keywords: Lycopersicon esculentum ; tomato ; genotypes ; low energy ; diallel cross ; combining ability ; early production
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Diallel crosses were made between 15 tomato genotypes with varying performance under a low energy regime. It appeared that differences between genotypes for 11 vegetative and generative plant characters are determined mainly by additive genetic variation. For breeding cultivars adapted to low energy conditions, crossing genotypes with a high GCA for weight of trusses and fruits (WTF) and genotypes with a high GCA for weight of vegetative plant parts (WVP) seems most promising. Complications may arise from the negative correlation between GCA values for WTF and WVP, and the strong positive correlation between GCA values for fruit number and WTF, causing small fruits.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00730665
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  • 5
    Electronic Resource
    Electronic Resource
    Genetical and environmental factors influencing seed size of tomato (Lycopersicon esculentum Mill.) and the effect of seed size on growth and development of tomato plants (1983)
    Springer
    Euphytica 32 (1983), S. 711-718 
    Details
    ISSN: 1573-5060
    Keywords: Lycopersicon esculentum ; tomato ; inheritance ; plant vigour ; seed size ; tomato
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Among cultivars of tomato important heritable differences for seed size occur. The inheritance of this character appears to be determined predominantly by maternal factors. Seed size is also influenced by environmental factors, such as mode of pollination and competition between fruits within and between trusses. Large seeds germinate earlier than small seeds, may produce larger cotyledons and more vigorous and earlier yielding plants, but generally the effect of seed size on growth is relatively small or absent. Therefore breeding large seeded tomato cultivars to hasten and improve production does not seem to open prospects.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00042151
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  • 6
    Electronic Resource
    Electronic Resource
    Breeding for resistance to fusarium oxysporumF. SP. tulipae in tulip (tulipaL.).2. phenotypic and genotypic evaluation of cultivars (1979)
    Springer
    Euphytica 28 (1979), S. 67-71 
    Details
    ISSN: 1573-5060
    Keywords: Tulipa ; tulip ; Fusarium oxysporum ; Fusarium bulb rot ; resistance
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Fusarium bulb rot is a serious tulip disease. Breeding for resistance may contribute considerably to a solution of the problem. It has been demonstrated that juvenile and adult bulbs of the same cultivars in Fusarium contaminated soil showed good agreement in degree of resistance. From an incomplete diallel cross of these cultivars second-year bulblets of 62 progenies were planted in both contaminated and non-contaminated soil. The percentages of non-diseased bulbs harvested provided a criterion for resistance. The analysis of combining ability for the degree of resistance revealed that both the mean square of GCA and that of SCA were significant. The relative magnitudes of the GCA and SCA mean squares suggest that resistance is governed primarily by additive gene action. The GCA of individual parents could be estimated and tested. In general it corresponded with their phenotypic behaviour.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00029174
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  • 7
    Electronic Resource
    Electronic Resource
    Breeding research on rose pigments. II. Combining ability analyses of variance of four flavonoids in F1 populations (1980)
    Springer
    Euphytica 29 (1980), S. 115-120 
    Details
    ISSN: 1573-5060
    Keywords: Rosa ; rose ; Hybrid Tea rose ; flower pigment ; flavonoids ; paper chromatography ; diallel ; combining ability
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary 18 Hybrid Tea-rose varieties were crossed and selfed in an incomplete diallel. In F1 seedlings the relative contents of the flavonoids: pelargonidin, cyanidin, kaempferol and quercetin, were determined by means of paper chromatography. Inheritance of each pigment was mainly controlled by additive gene action. Combining ability analyses of variance of these pigments showed highly significant differences between GCA's of the varieties. The pigment content of parent varieties can be a useful basis for breeding.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00037255
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  • 8
    Electronic Resource
    Electronic Resource
    Statistical analysis of growth curves in plant breeding (1982)
    Springer
    Euphytica 31 (1982), S. 51-64 
    Details
    ISSN: 1573-5060
    Keywords: Growth curves ; measuring growth (design) ; multivariate analysis of variance (MANOVA)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary In the first part of this paper some experimental conditions necessary for a valid statistical analysis of differences in growth curves are discussed. Next the multivariate character of growth curves is considered. Data on the growth curves of three genotypes of an experiment with tomatoes of the IVT are used for illustrating the computational procedure and some aspects of interpretation. The growth curves of log dry leaf weight for each plot could be described by a quadratic function of time and were characterised by three components: mean level m, slope 1 (linear component) and curvature q (quadratic component). Univariate analyses of variance (ANOVA) showed significant differences between cultivars for each growth component: however, this is only part of the information as the correlation between the components is not involved. From a multivariate analysis of variance (MANOVA) it appeared that in this experiment the differences in growth between the cultivars were best expressed by using mean level m only. An estimate of the final (reduced) statistical model underlying the tomato example is derived. It is advised to split up growth into different phases of development each with its own analysis. At least four harvest dates for every phase seem desirable.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00028306
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  • 9
    Electronic Resource
    Electronic Resource
    Genetic analysis of cut flower longevity in Gerbera (1985)
    Springer
    Euphytica 34 (1985), S. 779-784 
    Details
    ISSN: 1573-5060
    Keywords: Gerbera jamesonii ; gerbera ; cut flower longevity ; vase life ; inheritance
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The vase life duration and stem stiffness of 12 parent clones and 77 progenies of Gerbera jamesonii were studied both in summer and in winter. In winter, vase life was shorter and the stems were weak. Few exceptions from this general pattern were detected. The average vase life duration ranged from 16.0 days for the best to 8.9 days for the worst progeny. Individual plants were selected with a vase life of 20 or more days. The curvature of the stem, measured after 24 hrs dry storage, is associated with the folding of the stem in the vase. Selection for low curvature may decrease the incidence of folding and with it the variation in vase life of Gerbera.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00035416
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  • 10
    Electronic Resource
    Electronic Resource
    Genetic analysis of flower and lateral shoot production in Gerbera (1985)
    Springer
    Euphytica 34 (1985), S. 785-791 
    Details
    ISSN: 1573-5060
    Keywords: Gerbera jamesonii ; gerbera ; cut flower yield ; lateral shoots ; inheritance ; selection
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary An incomplete diallel cross with selfs and reciprocals was made with twelve cultivars of Gerbera jamesonii. Very significant differences occurred between GCA's of the parents for cut flower yield, earliness and number of lateral shoots. The selfs were mainly responsible for the significant SCA's. A positive genetic correlation occurs between the number of lateral shoots at anthesis of the first flower and total flower production. The phenotypic performance of parents (measured on cuttings) was poorly related to their breeding value (measured on seedlings). It is suggested that this is due to physiological differences between cuttings and seedlings.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00035417
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