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Abstract
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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