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  • 1
    Electronic Resource
    Electronic Resource
    Characterization of preharvest sprouting resistance in Clark's Cream white winter wheat (1988)
    Springer
    Euphytica 38 (1988), S. 85-92 
    Details
    ISSN: 1573-5060
    Keywords: Triticum aestivum ; wheat ; preharvest sprouting ; dormancy ; α-amylase ; falling number ; inhibitors ; embryo response
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Resistance to preharvest sprouting has been observed in several white wheat (Triticum aestivum L.) genotypes, but the mode of resistance has not been determined. Studies were conducted to characterize the strong preharvest sprouting resistance in Clark's Cream genotype to facilitate breeding for the trait. Clark's Cream and five other hard red and white wheat genotypes were grown in the glasshouse and field and effects of simulated rain, embryo maturity, inhibitors in floral parts and GA, endogenous inhibitors, and ABA and GA combinations on sprouting were measured. The six genotypes differed significantly in sprouting after simulated rain, α-amylase activity, and response to GA and ABA. Embryo maturity and inhibition levels in floral parts and caryopses were nearly similar for all genotypes. Clark's Cream appeared to differ most in high embryo sensitivity, which was fairly nonspecific for ABA, GA, and endogenous inhibitor, and in low α-amylase production during sprouting. Breeding procedures that lead to the preharvest sprouting resistance of Clark's Cream are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00024814
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  • 2
    Electronic Resource
    Electronic Resource
    Heritabilities and genetic variation for preharvest sprouting in progenies of Clark's Cream white winter wheat (1988)
    Springer
    Euphytica 38 (1988), S. 93-100 
    Details
    ISSN: 1573-5060
    Keywords: Triticum aestivum ; wheat ; breeding ; preharvest sprouting ; heritability ; variation ; α-amylase ; falling number
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Preharvest sprouting resistance is a major breeding criterion in many regions where white wheat (Triticum aestivum L.) is produced. Availability of genetic sources of sprouting resistance should significantly advance this goal. Objectives of the present investigation were to determine heritabilities and genetic variation of sprouting resistance in progeny of six susceptible genotypes and Clark's Cream, a cultivar with excellent sprouting resistance. Sixty-five randomly selected F2:F3 lines from the six parental combinations were evaluated in blocks-within-replication designs at two locations during 1984–85. Falling number, α-amylase activity, and sprouting percentage in simulated rain were usually more favorable in F2:F4 grain than in grain of the susceptible parents and frequently equalled levels in grain of the resistant parent. Broad sense heritability estimates were moderate to high for falling number and α-amylase activity, low to moderate for visual sprouting, and inconsistent for embryo germination in ABA. Phenotypic correlations with sprouting were significant most often for falling number and least often for the agronomic traits, days to heading and kernel weight. We concluded that increased preharvest sprouting resistance is an attainable objective when genetic sources of strong resistance and appropriate selection criteria, such as sprouting after simulated rain, are used.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00024815
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    Paper (German National Licenses)
    Fulltext
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