Ecological plasticity of spring wheat varieties in the forest-steppe of Krasnoyarsk region

The purpose of the research was to study ecological plasticity of zoned varieties of soft spring wheat in the southern forest-steppe zone of Krasnoyarsk Region. The objects of the research were the varieties of soft spring wheat Altayskaya 70, Kanskaya, Novosibirskaya 15, Novosibirskaya 29, Novosibirskaya 31, Novosibirskaya 41, Omskaya 32 and Pamyati Vavenkova at the state variety testing on Krasnoturansk state variety testing plot in 2016-2018. The calculation of environmental plasticity and stability parameters (bi, σ) was conducted according to the method of S.A. Eberhartand and W.A. Russell, the rate of homeostasis (Hom) was calculated using the formula of V.V. Khangildin, the parameters of resistance and stability of spring wheat were calculated using the method of E. D. Nettevich. The assessment of cultivation conditions for three years of the research for two predecessors showed that they had been the most favorable in 2016 for fallow predecessor, and the least in 2017 for solid sowing crops. To a greater extent, the varieties Kanskaya, Omskaya 32, Altayskaya 70 realized their potential for the yield in the conditions of the variety plot. The comparison of various methods for assessing the varieties in terms of stability and plasticity showed that their resolution was not the same. The most complete information was provided by using several methods at the same time it was more convenient to use the principle of ranking varieties in all parameters and to carry out the assessment by the sum of points. In contrasting growing conditions, the varieties showed different adaptive properties for yield. In terms of the total points, Kanskaya soft spring wheat showed the best ecological plasticity and stability in this set of varieties. It responds well to improved growing conditions and reduces in unfavorable conditions.