D-HORDEIN POLYMORPHISM IN SPRING BARLEY H ORDEUM-VULGARE L

The SDS-electrophoresis technique was used for studying D-hordein poly morphism in 160 spring barley varieties from northern Europe, the Euro pean part of the former USSR and Siberia, western and Central Asia, so utheastern Asia, and Africa (Ethiopia). Five variants with molecular w eights of 84, 90, 92, 94, and 96 kDa were identified. It was shown tha t they were all controlled by the Hor 3 locus; the corresponding allel es were designated Hor 3a-e, Allele frequencies varied from 2.2% to 57 .5%. Frequencies and composition of the alleles differed considerably in the variety samples studied. The highest diversity was observed in the varieties from Asia and Africa. Possible reasons for variations in allele frequencies are discussed.