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GENETIC VALUE OF MAIZE SELF-POLLINATED LINES BY THE LEVEL OF COMBINING ABILITY

Article language

Українська, Русский, English

Print date

20.12.19

Date posted online

11.04.2020

Institution

Plant Production Institute nd. a. V.Ya. Yuriev of NAAS National Center for Plant Genetic Resources of Ukraine

Bibliography

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Section

SOURCES AND DONORS

Abstract

Aim. Evaluation of maternal forms in terms of morphological and economic characteristics, assessment of their combination ability.

Results and Discussion. 175 maize self-pollinated lines of different geographical origin were explored. The level of the combining ability of maize lines was determined by the main quantitative characteristics: plant productivity, ear length, grain number on ear, row number on ear, weight of 1000 grains, representing their breeding suitability.

Donor properties were revealed in 14 lines of their own breeding, in which a high level of characters manifests itself in hybrid combinations. Among the studied simple hybrids with the participation of these lines, productive combinations were highlighted: UHI 5/Kharkivska 126, UFF 4/Kharkivska 164; UHF 175/Kharkivska 164; UHK 568/Kharkivska 164; UHK 579 / Kharkivska 164 with a yield capacity of 9.4-11.1t/ha with a standard yield of 6.8-7.8t/ha. Among the lines of foreign origin, high combining ability in crosses with domestic lines was found in the lines RF 90 from the Illinois University (USA), lines SK 543/18, SK 591/18 from the University of Manitoba (Canada), 1028 SPT from the Liaoning Academy of Agriculture (China).

Conclusions. The self-pollinated lines of maize are identified, which are a valuable source material for creating new promising hybrids with a complex of valuable economic traits. Their use will increase the efficiency of the breeding process and ensure its acceleration by 4-5 years.

Keywords

maize, line, tester, standard, combining ability, heterosis, productivity