Common wheat genotypes with null-alleles at gliadin loci

Abstract

Aim. The study was aimed at identification and selection of winter common wheat genotypes with null-alleles at the gliadin loci Gli-B1 and Gli-D1. Methods. The search for spontaneous mutants with the absence of synthesis of gliadin blocks was made in winter common wheat hybrid material and cultivars. To identify mutations, APAG electrophoresis and SDS-electrophoresis of seed storage proteins were performed. Results. The frequency of spontaneous mutations resulting in the null-allele at the loci Gli-B1 and Gli-D1 in F2 was 0,1 % and 0,05 %, respectively, in the cross Odesska chervonokolosa × B-16. Via sowing the material with those mutations and marker selection, F6 lines were developed: the line OB-Bnull with the null-allele at the Gli-B1 locus and the line OB-Dnull with the null-allele at the Gli-D1 locus. Another line with the null-allele at Gli-B1 was produced from the cross B3 × D4 by marker selection, as well as a biotype with the null-allele at the Gli-D1 locus was selected from the cultivar Slaven. Conclusions. The developed lines with null-alleles at the gliadin locus Gli-B1 (without omega-5 gliadins) and Gli-D1 (without omega-1,2 gliadins) are initial material for hypoallergenic wheat breeding.