Combination ability of new inbred corn lines bred by VNIIK

L.A. Galgovskaya, O.V. Terkina, A.N. Romanova

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Abstract. The article presents the results of a study of new mid-early inbred lines of corn in terms of combining ability. The research was carried out on the experimental field of the All-Russian Research Institute of Corn in the period from 2015 to 2020. For five years selection was carried out on linear material based on economic characteristics, during which 5 lines of corn were selected for further work. The lines were obtained by repeated self-pollination and selection. To test the lines for general combining ability, the topcross method was used. We assessed the breeding value of new lines of corn in theconditions of the foothill zone of the Stavropol Territory. With the participation of new lines and three testers, 15 hybrid combinations were created. Analyzing the grain yield obtained by crossing new lines and testers, lines L 145 and L 374 had a high overall combinative ability. Line L 180 was characterized by a low overall combinative ability. Specific combining ability was calculated according to Savchenko. High results were obtained by crossing the L 126 line and the T8172 M tester and the L 145 line with the T5179 M tester. We studied the reaction of the analyzed lines to the consolidation of sterility and restoration of fertility. As a result of the analysis of flowering panicles of F1 hybrids obtained by crossing a line and a tester for sterility type M, all five lines proved to be fixers.

Keywords: inbred lines, combinative ability, topcross crossings

For citation. Galgovskaya L.A., Terkina O.V., Romanova A.N. Combination ability of new inbred corn lines bred by VNIIK. News of the Kabardino-Balkarian Scientific Center of RAS. 2023. No. 6(116). Pp. 264–269. DOI: 10.35330/1991-6639-2023-6-116-264-269

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Information about the authors

Galgovskaya Lyudmila Anatolyevna, Senior Researcher at the Department of Selection, All-Russian Research Scientific Institute of Corn;
357502, Russia, Pyatigorsk, 14-o Ermolov street, building 1;
e-m252@mail.ru, ORCID: https://orcid.org/0000-0002-3990-0220;
Terkina Olga Valentinovna, Senior Researcher at the Department of Selection, All-Russian Research Scientific Institute of Corn;
357502, Russia, Pyatigorsk, 14-o Ermolov street, building 1;
kukuruza.ekologiya.14@mail.ru, ORCID: https://orcid.org/0000-0002-4733-5719;
Romanova Anna Nikolaevna, Junior Researcher at the Department of Selection, All-Russian Research Scientific Institute of Corn;
357502, Russia, Pyatigorsk, 14-o Ermolov street, building 1;
an.romanowa2012@yandex.ru, ORCID: https://orcid.org/0000-0001-7337-7093