ADAPTIVE CAPACITIES OF OATS VARIETIES OF OMSK AGRICULTURAL RESEARCH CENTRE SELECTION

Adaptibility, plasticity, stability and stress resistance of the oats variety are seen as significant for obtaining stable oat yields with high grain quality. The research aims at assessment of the adaptive capacities of oat varieties selected at Omsk Agricultural Research Centre. The assessment was carried out by means of statistical parameters calculated on the basis of protein concentration in the grain. The experiment was conducted in 2011-2016 on the experimental fields of Omsk Agricultural Research Centre which is located in the southern forest-steppe of Omsk. Protein concentration in the oat grains averaged 11.2% in chaffy varieties and 16.2% in huskless varieties. Following S.A. Eberhart and W.A. Russell assessment, such varieties as Orion, Irtysh 13, Irtysh 21, Irtysh 23, Tarskiy 2, Fakel and Sibirskiy Gerkules combined high stability and response to better environmental conditions. Sibirskiy golozernyy, Progress, Skakun and Levsha varieties are characterized as varieties that responded to the conditions of cultivation (following S.A. Eberhart and W.A. Russell the coefficient of linear regression was 1.06 ÷ 1.72; according to V.A. Dragavtsev the coefficient of multiplicity varied from 2.05 to 2.60). The authors observed high resistant varieties (-1.60 ÷ -2.47) as Pamyati Bogachkova, Irtysh 13, Irtysh 23, Tarskiy 2, Skakun and Irtysh 21. Levsha, Sibirskiy golosernyy and Progress varieties were characterized by high degree of correspondence between environmental factors and genotype (according to A.A. Rossielle and J. Hemblin, compensatory capacity was 15.02 ÷ 16.32). Levsha, Sibirskiy golozernyy and Progress varieties refer to plasticity varieties (according to A.A. Gryaznov) and the index of environmental plasticity was 1.26 ÷ 1.36; Levsha, Sibirskiy golozernyy and Progress varieties refer to adaptive varieties (according to A.A. Zhivotkov) and their index of adaptivity varied from 126 to 136%. The authors recommend to include glumiferous varieties Sibirskiy golozernyy, Progress, Levsha, Irtysh 23, Orion, Tarskiy 2 (rank sum is 29.0 ÷ 40.0) and huskless variety Levsha (rank sum is 47.0) into the selection and breeding programs and cultivating them in Western Siberia.   

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