Analysis of the source material for the selection of lotus corniculatus in the conditions of the Non-chernozem region of Russia

Abstract

The article presents the results of testing 16 varieties of lotus corniculatus in comparison with the Smolensky 1 standard. The experience was laid in 2016, the yield of air-dry matter 2017-2020 was taken into account. The best in terms of hydrothermal coefficient (GTC) were 2018 with GTC=1.4 and 2019 with GTC=1.8. The analysis of the indicators of air-dry matter yield, ecological plasticity (bi), stability (Si2), stress resistance (Ymin - Ymax), genetic flexibility ((Ymax+Ymin)/2), yield span (d) was carried out. Favorable conditions for crop formation were formed in years with a positive value of the environmental conditions index (Ij). These are 2018 Ij=2.29 and 2019 Ij=1.15. The largest collection of air-dry mass of lotus corniculatus for the entire period gave the sample E-25 (52.2 t / ha) this is 45.8% higher than the variety Smolensky 1, E-47 with 46.3 t / ha by 29.3%, E-49 with 46.2 t/ha by 29% and E-50 with 45.1 t/ha by 26%; the average yield of air-dry matter in these samples also exceeded the standard by 44-25.6%. The most plastic samples were E-24 (bi=1.59), E-19 (bi=1.29), E-50 (bi=1.24), E-49 (bi=1.23). The most stable samples were E-47 (Si2 =0.1), E-50 (Si2=0.3), E-12 and E-4(Si2=0.6); unstable samples were E – 10 (Si2=10.0) and E-39 (Si2=8.7). Stress resistance is best in E-12 (Ymin-Ymax=-2.54) and E-9 (Ymin - Ymax=-4.92); worst in E-24(Ymin - Ymax=-9.56). Maximum genetic flexibility (Ymax+Ymin)/2 had cultivars E-25 (12.77), E-10 (11.73), E-49 (11.54). The lowest yield range (d) in E-12 is 24.68 %, the highest in E – 24 is 60.89 %.