Source material for breeding winter bread wheat in the north of the Middle Volga region

Background. Bread wheat ( Triticum aestivum L.), due to significant progress in breeding, has high potential of biological productivity, but its implementation is quite low. To change the situation for better, it necessary increase resistance developed cultivars unfavorable abiotic and biotic factors regions cultivation. solve this problem, source material required. The purpose research was evaluate a set winter accessions from VIR collection, first all, newly introduced accessions, working collection Kazan Scientific Center Russian Academy Sciences variability agronomic traits stability under conditions north Middle Volga region, identify sources promising inclusion crossing programs. Materials methods . A three-year field study 166 bread carried out. All were assessed their overwintering plant ear productivity using by State Variety Trials. best or sources, selected comparing them with reference cv. ‘Kazan 560’, taking into account quantitative values such indicators as “general adaptability” (ОАС i ), variance “specific (σ2 САСi ) “relative stability” (S gi each accession according A. V. Kilchevsky L. Khotyleva. Results conclusion Descriptions are presented context traits. Groups subgroups different trait levels identified. Some stable manifestation exceeded productivity. breeding It shown that group “weakly changing” over years differs “moderately/strongly correlations between number correlations.