Immunological and adaptive assessment of soybean samples of competitive variety testing in the Amur region

The results of study of the samples of competitive variety testing in the Amur region are presented. The research was carried out in 2018-2020 on experimental plots of the breeding crop rotation of the All-Russian Scientific Research Institute of Soybean. As a result of the phytopathological survey, 12 best highly immune soybean samples were identified, of which the most adaptive (Ka > 1) to the conditions of the region were marked with 5 numbers: Amurskaya 24/42 (Ka = 1, 07), Amurskaya 24/54 (Ka = 1.07) and Amurskaya 24/60 (Ka = 1.11), Alena standard (Ka = 1.05), Amurskaya K-4/23 (Ka = 1.02) and Amurskaya K-14/17 (Ka = 1.05). As a result of a comprehensive assessment, considering the indicators of adaptability, productivity, and resistance to diseases, the 3 best soybean samples were identified: early-ripening – Amur 24/42; medium-ripening - Amur 24/54, Amur 24/60 with a yield of 2.78 (+ 0.46 t/ha to st); 2.80 (+ 0.32 t/ha to st); 2.75 (+0.27 t/ha to st). Two of which Am. 24/60 and Am. 24/42 were transferred in 2020 to the State Variety Testing for 2021-2022 as new highly productive, immune varieties Tisei and Luchistaya