New inbred lines of corn created at the Siberian branch of the All-Russian research institute of сorn

The article reflects the problem of the lack of early-ripening corn hybrids classified by FAO as 140-160 for cultivation in the Ural-Siberian Region and the need to expand the collection of inbred lines to create such hybrids. Object of the current research were 15 new inbred corn lines created at the Siberian Branch of the All-Russian Research Institute of Corn (Omsk) from 2000 to 2019. The experiments were carried out in 2018-2020. The results of phenological and biometric observations, the structural analysis of cobs, the general and specific combining ability, the response to cytoplasmic male sterility of C- and M-types of new corn lines bred in Omsk are presented. The lines with the best indices of economically valuable traits have been identified as follows: as for the duration of the “sprouting - cob flowering” period ,Om 25, Om 26, Om 44, Om 48, Om 54 and Om 397 with 49-50 days; as for plant height, Om 30, Om 33, Om 45, Om 48, Om 52 and Om 54 with 185-215 cm; as for the height of the upper cob ears, Om 48, Om 52 and Om 54 with 56-77 cm; as for grain yield, Om 30, Om 33 and Om 42 with 4.18-4.49 t/ha; as for the number of seeds on the cob, Om 15, Om 40, Om 50 and Om 54 with 261-274 pieces; as for the number of rows of grains on the cob, Om 48, Om 52 and Om 54 with 14.0-14.8; as for the thousand kernel weight, Om 25, Om 26, Om 30 and Om 33 with 224-248 g. The lines Om 26, Om 40, Om 44, Om 45, Om 50 and Om 397 have shown a high general combining ability, while Om 15, Om 20, Om 30, Om 45 and Om 50 have shown a high specific combining ability; Om 26, Om 40, Om 44 and Om 45 were identified as M-type fertility semi-restores, Om 44 as a C-type one.