|Characterization of Preharvest Sprouting Resistance in Clark's Cream White Winter Wheat. Euphytica 38:85-92
|Upadhyay,M.P., Morris,C.F. and Paulsen,G.M.
|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, a-amylase activity, and reponses
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 a-amylase production during sprouting. Breeding procedures that lead to the
preharvest sprouting resistance of Clark’s Cream were discussed.
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