ECOLOGICAL AND GEOGRAPHICAL ASSESSMENT OF SOYBEAN BREEDING LINES OF KRASNODAR BREEDING IN THE CONDITIONS OF THE LIPETSK REGION
2023
Zelentsov, S. V. | Paspekov, D. I. | Tevchenkov, A. A. | Moshnenko, E. V.
The article presents the results of ecological and geographical evaluation and breeding development of very early soybean lines of Krasnodar selection of F6-F7 generations in the conditions of the forest-steppe of the Central Federal District of the Russian Federation. In the conditions of Krasnodar, very early elite soybean plants with a vegetation period of 90-100 days, plant height of at least 70 cm, and increased productivity were isolated in hybrid populations F4. Their progeny in generations F6 and F7 underwent selection evaluation in latitudinal and climatic conditions of the forest-steppe of the Central Black Earth Region on the basis of the Lipetsk Rapeseed Research Institute, Lipetsk. As a result of the research, it was found that in typical weather conditions of the Central Chernozem region in 2021 and under the terms of sowing soybean in the 2nd decade of May, the earliest genotypes matured in late August - early September. The duration of their vegetation periods was 96-103 days. Under abnormally cold and rainy conditions in 2022, the vegetation period of these genotypes increased to 110-123 days. The yield of the earliest of the studied soybean genotypes under the conditions of 2021 varied within 2.04-2.46 t/ha, under the conditions of 2022 – within 2.07-2.91 t/ha. Two-year analysis of productivity of the studied soybean genotypes in different weather conditions allowed to identify 7 breeding lines forming yields of more than 2.0 t/ha both in near-optimal and abnormally cold weather conditions with excessive precipitation.
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