title: [Selective value and gene geography of the alleles of Barley beta- amylase locus Bmy1].
abstract: Polymorphism for locus Bmy 1 was studied in 406 cultivars of spring barley, 189 of which were regionalized in the former Soviet Union between 1929 and 1990. Three alleles were detected: Bmy 1 Ar, Bmy 1 Br, and Bmy 1 Al. The frequencies of these alleles were 35.59, 60.46, and 3.45%, respectively. In contrast to Bmy 1 Ar, the allele Bmy 1 Br was shown to correlate with an increase in the amylolytic activity of malt. Barley plants differing in the Bmy 1 alleles were found to differ in seed productivity. Allele Bmy 1 Ar was shown to prevail in cultivars from the northern regions of the former Soviet Union, in which its frequency exceeds 50%. Toward the south, its frequency gradually decreases to 14-17%. Conversely, the frequency of allele Bmy 1 Br increases from 38.6% (north) to 85.7% (south). The pattern of allele distribution depends on the following factors: temperature pattern during the growing season, moisture supply, and climate continentality.
authors.affiliation: Belgorod Research Institute of Agriculture, Russia.
authors.forename: V P
authors.initials: VP
authors.lastname: Netsvetaev
authors.forename: A A
authors.initials: AA
authors.lastname: Pomortsev
authors.forename: A E
authors.initials: AE
authors.lastname: Chaplia
mesh_terms: D000483:Alleles; D017343:Genes, Plant; D001467:Hordeum / Q000201:enzymology / Q000235:genetics*; D011110:Polymorphism, Genetic; D001614:beta-Amylase / Q000235:genetics*
chemical_list: D001614:beta-Amylase