ANALYSIS OF PEDIGREES OF COMMON WHEAT CUL TIVARS BY ALPHA-AMYLASE POLYMORPHISM

Analysis of alpha-amylase spectra in 21 common wheat cultivars showed that 11 samples were homogeneous and 10 were heterogeneous. Two ways b y which within-cultivar heterogeneity may appear - either as a result of an initial cross or as a consequence of uncontrolled cross-pollinat ion and contamination of the cultivar - are discussed. Based on an ana lysis of polymorphism at the alpha-Amy-A1, alpha-Amy-B1, alpha-Amy-D1, and alpha-Amy-B3 loci in the cultivars and their parental forms, gene alogical data for 18 of them were confirmed. Three other cultivars stu died had alpha-amylase alleles that were not revealed in parental form s. The results show that polymorphism of alpha-amylase may be used for seed control.