Evaluation of combination ability of corn lines for starch content

Abstract

The results of the study of starch content in corn hybrid combinations are presented. As a result of the study of experimental hybrids created on the basis of VIR collection material, the breeding and combinational value of the lines in terms of grain content and starch yield per 1 ha was revealed. The results of starch harvesting per unit area are given. The experiment includes simple hybrids (30 combinations) obtained using the full top-cross crossing scheme. In the study, the RCK 7, B 293 lines and the synthetic population of RNIISK 1 were used as testers. The interval of variation of starch content in the grain during the study period varied from low values to the average indicator. It was 60.9% to 65.2% in 2020, and 59.3% to 66.1% in 2021. The lines with high effect of total combining ability by starch content in the grain (X 46, Bz 6, Om 12, UV 106), and hybrid combinations of UV 25 / PCK 7 (63, 3-64.2%), KC 75 / PCK 7 (62.7-64.4), HLG 948 / PCK 7 (63.5-64.1), Kin 073 / PCK 7 (63.4-63.8), UV 106 / PCK 7 (63.6-66, 1), KC 25 / B 293 (63.0-63.5), HLG 182 / B 293 (63.5-63.6), KC 75 / B 293 (63.1-63.5), HLG 182 / RNISK 1 (62.9-63.6%) were identified. The experimental hybrids that form the highest yield of starch per unit area were identified: HLG 182 / RCK 7 (3,12-3,58 t/ha), UV 106 / RSK 7 (2,77-3,11), X 46 / B 293 (3,22-3,39), Om 12 / B 293 (2,72-3,85 t/ha).