Adaptability of naked oat lines and varieties in the conditions of Kirov region

Abstract

The studies were carried out in 2015-2018. In the conditions of the Kirov region 25 lines and varieties of naked oat were studied in competitive test nursery. High significant correlation between and hydrothermal traits was revealed (r = 0.72). Lines 14h12o, 11h12o, 21h12o, 12h12, 63h11, 42h12o, 31h12, 54h11, 37h12, and variety Bekas were selected, as they significantly exceeded standard variety Vyatsky by yield productivity. Two-factor analysis of variance (ANOVA) revealed significant influence offactors and their interaction on productivity of naked oat lines. The influence of the year was 31.6% and the genotype influence amounted to 15.2% of the trait general phenotypical variability. Calculation of values of plasticity (b) and stability (S 2 ) allowed to select lines with higher plasticity: 14h12o, 11h12o, 21h12o, 12h12, 1h07, 72h11, 63h11, 42h12o, 31h12, 54h11 (b i = 1.09... 1.53). Weak response to changes in environment conditions was observed in lines 114h12, 4h12, 100h12 and in Persheron variety (b i = 0.30...0.58). Line 102h13 and Persheron variety were the most stable (S 2 i = 0.15). The best conditions according to the indexes of environment conditions were in 2015 and 2017 (Ij = 0.41 and 0.69). The worst conditions for oat growth and development were in 2016 (Ij = -1.06). A significant middle correlation dependence between productivity and plasticity (r = 0.423), productivity and stability (r = 0.417) was established. The calculation of variation coefficient showed a high variation of the following traits: number of grains per panicle, grain per panicle, grain per plant, yielding of . The traits 1000 mass and productive tilling capacity were less variable. Therefore, the perspective high-yield lines of naked oat 11h12o, 21h12o, 37h12o and 63h11 combining high plasticity and middle-level stability of basic elements ofproductivity structure have been selected.