SPRING WHEAT ACCESSIONS ADAPTABILITY BY PRODUCTIVITY ELEMENTS UNDER THE YENISEI SIBERIA CONDITIONS
The purpose of the study is to determine the adaptive potential of spring wheat samples grown under different conditions of the Yenisei Siberia in terms of productivity elements and to analyze the relationship between the adaptability indicators of accessions for these traits. The object of the study was 24 accessions of spring wheat, which were grown in three geographical locations: the Krasnoyarsk Region, the Republic of Khakassia and the Republic of Tyva. The HTC values for these items were respectively: 1.50; 1.25; 0.93. In samples of wheat, the weight of 1000 grains and the duration of the growing season were determined. For each of these traits, 4 parameters of adaptability of wheat accessions were calculated: the coefficient of ecological variation Cv, the stress resistance index d, the homeostatic parameter Hom, and the indicator of the level and stability of the variety PUSS. It was established that wheat samples formed the largest grain in the conditions of Khakassia. Significant differences in the length of the growing season were observed between wheat grown in Khakassia and Tuva: 93.5 and 83.2 days, respectively. According to the highest value of the mass of 1000 grains for all points, the variety Oazis was distinguished, and the accessions Novosibirskaya 15 and Novosibirskaya 16 were distinguished by the maximum early maturity. The optimal value of adaptability in terms of the duration of the growing season was noted in the sample Omskaya 44. It was shown that the correlation between the plasticity parameter Cv, determined by the weight of 1000 grains, on the one hand, and those found by the duration of the growing season, on the other hand, was positive and significant. The obtained result suggests that the selection of wheat for increased stability on the basis of "mass of 1000 grains" will be accompanied by an increase in the stability of samples on the basis of "vegetation period duration".