Abstract
Hybrid necrosis genotypes have been identified in 125 Russian cultivars of winter bread wheat. More than half of them (56%) carry the Ne2 gene (genotype ne1ne1Ne2Ne2); others are free of necrosis genes (genotype ne1ne1ne2ne2). The possible causes of the increase in the Ne2 allele frequency and the loss of the Ne1Ne1ne2ne2 genotype in modern Russian cultivars of winter wheat are discussed. The principal component method has been used to compare the structures of the genetic diversity of cultivars differing in the hybrid necrosis genotype. It has been found that the Ne2 allele in winter wheat cultivars from northern Russia has originated from the cultivar Mironovskaya 808, whereas the cultivar Bezostaya 1 is not a source of this gene. In cultivars from southern Russia, the presence of the Ne2 allele is also mainly accounted for by the use of Mironovskaya 808 wheat in their breeding. The recessive genotype is explained by the presence of descendants of the cultivar Odesskaya 16 in the pedigrees of southern Russian winter wheats. The genetic relationship of cultivars with identical and different necrosis genotypes has been analyzed in nine regions of the Russian Federation.
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Original Russian Text © V.A. Pukhalskiy, E.N. Bilinskaya, S.P. Martynov, T.V. Dobrotvorskaya, G.A. Obolenkova, 2008, published in Genetika, 2008, Vol. 44, No. 2, pp. 209–218.
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Pukhalskiy, V.A., Bilinskaya, E.N., Martynov, S.P. et al. New data on the distribution of hybrid necrosis genes in winter bread wheat (Triticum aestivum L.) cultivars. Russ J Genet 44, 171–179 (2008). https://doi.org/10.1134/S1022795408020087
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DOI: https://doi.org/10.1134/S1022795408020087