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 "productivity" and "hydrothermal coefficient" 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 (S²) 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 (S²_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 grain productivity and plasticity (r = 0.423), grain 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 mass per panicle", "grain mass per plant", "yielding of grain ". The traits "1000 grain 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.