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NEW LINES OF MAIZE ARE DONORS OF VALUABLE ECONOMICAL CHARACTERISTICS FOR BREEDING

NEW LINES OF MAIZE ARE DONORS OF VALUABLE ECONOMICAL CHARACTERISTICS FOR BREEDING

Institution

Section

SOURCES AND DONORS

Abstract

Goal. To determine donor properties of new 22 maize lines, different by their genetic basis.Results and discussion.The results of evaluation of using efficiency and donor properties of 22 new linesdiverse in genetic basis, genealogy of which includes seven synthetic populations of Ukraine, Australia,USA, one hybrid from Thailand and one variety of the United States, all registered in the National Centerfor Plant Genetic Resources of Ukraine. The lines were grouped in clusters by the level of productivity andits components and included in the system of test crosses. In terms of GCA and SCA, donor properties ofthe lines are estimated. In the lines UHK 510, UHK 550, UHK 551 and UHK 571, high level ofproductivity is combined with higher rates of the grain number in the ear and GCA on the ear length orrows number. The lines UHK 550, UHK 551, UHK 562, UHK 563,UHK 571 are donors of this character;hybrids with high level of its manifestation are obtained with their participation. The line UHK 510 is adonor of increased amount of grain rows on the ear. The lines – donors of complex of economic traits areidentified: UHK 550 and UHK 551 created based on the American plasma, and the UHK 571, initial formof which comes from Thailand.Conclusions. The best hybrid combinations on competitive heterosis are identified. The contribution ofgenotypes of the lines, testers and their interaction in the total variability of hybrids is determined. Ingeneral, variability of the test hybrids is determined to the greatest extent by genotypes of the lines.

Keywords

maize, line, heterosis, hybrid combination, trait, donor