Yield and adaptive potential of collection samples of filmy oats in the conditions of the Volga-Vyatka region

The purpose of the research was to evaluate 15 samples of spring filmy oats in a collection nursery according to the yield and adaptability parameters. The research was carried out in 2022–2024 in the conditions of the Kirov region (VolgaVyatka region). The "year" factor had the greatest impact on the yield – 60.1 %. The index of environmental conditions (Ij) ranged from +105 to -151 over the years. On average, over the years of the research, high yields were formed by samples k-15340 ‘Uran’ (541 g/m2), k-3969 0122 (539 g/m2), k-3967 0144 (531 g/m2). Samples with high stress resistance (U2 - U1) were identified – k-15495 ‘Vsadnik’ (-94), k-3967 0144 (-175), k-15498 ‘Uralets’ (-196); with high genetic flexibility (U1 + U2)/2 – k-3969 0122 (517), k-15340 ‘Uran’ (509), k-3967 0144 (504). The highest total adaptive capacity (TACi) was found in samples k-15340 ‘Uran’ (41), k-3969 0122 (39), and k-3967 0144 (31). According to the set of indicators, the most stable samples were identified – k-15495 ‘Vsadnik’, k-3967 0144, k-15498 ‘Uralets’ (compensation coefficient (Kgi) – 0.08–0.34; relative genotype stability (Sgi) – 9.8–22.3 %; variants of specific adaptive ability (σ2CASi) – 47.9–101.8; stability factor (SF) – 1.22–1.57). Samples k-15495 ‘Vsadnik’, k-3967 0144, k-15291 ‘HETMAN’, k-15498 ‘Uralets’, k-15429 ‘CWAL’, and k-15496 ‘Stipler’ were characterized by weak responsiveness to changes in environmental conditions (linear regression coefficient (bi) – 0.33–0.97). Samples 15495 ‘Vsadnik’, k-3967 0144 (breeding value of genotype (BVG) – 398.6–343.8) had high stability according to the "yield" trait. A very high positive correlation was found between the values of yield and TACi (r = 1.00). Collection samples k-15495 ‘Vsadnik’, k-15498 ‘Uralets’ (Russia), k-15429 ‘CWAL’ (Poland), k-3967 0144 (USA) which received the lowest amount of ranks (30-52) when ranked in terms of adaptive ability are of interest for further breeding work.

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