Ecological pea adaptibility in cultivated land of Khakassia

The aim of the study was to determine the parame-ters of pea adaptability in cultivated land of Khakassia. The main research objectives were to determine the influence of variability factor on the formation of pea productivity; to calculate the parameters of pea adapta-bility. The object of research was pea’s varieties of dif-ferent maturity groups. The productivity was determined on the basis of ecological variety trial of 17 varieties in 2016-2017 in three points located in areas of real steppe, dry steppe and forest steppe of the Republic of Khakassia. To calculate the influence of the main fac-tors of yield variability three factors analysis of variance was conducted and their influence on symptom forming was identified. The factor “year” determined the forming of symptom by 17 %. In general according to the exper-iment in 2016 average yield of 17 pea varieties on three items was 2.0 and in 2017 - 2.3 t/hectare. Climatic fac-tor was represented as the factor "point" determined the yield formation by 70 %. During two years of environ-mental test average yield of 17 varieties was 1.8 t/ hec-tare in "Shira", 2.0 t/ hectare - in "Zelyonoye" and 2.7 t/ hectare - in "Tashtyp". Genotypic differences between varieties determined the display of the symptom only by 2 %. This allows concluding that the potential of the symptom "yield" was high as ecological variety trial was formed from genotypes which had passed rigid breeding selection. The most favorable conditions for pea yield were formed in forest-steppe zone of the Republic of Khakassia. According to the results of ecological variety trial, varieties Altai universal and Yakhont (2.5 t/ hec-tare), Kemchug (2.4 t/ hectare), Shrek and Thomas (2.3 t/ hectare), Agrointel 2 and Ruslan (2.2 t/ hectare) had the best yield. By the parameter of ultrastability the varieties Buslay, Shrek, Ruslan and Altai universal stood out. High ecological plasticity was observed in the varieties Kemchug, Radomir, Yakhont, Altai universal, Omskiy 18, Agrointel 2, Saryal, Thomas and Krepysh. By yield stability varieties Buslay, Yamal, Ruslan, Omskiy 18, Shrek, Radomir, Thomas and Yakhont were pointed out.