The study of the combining ability of the inbred lines of winter rye according to top-crossing method

Fifty interline hybrids of F₁ of winter rye obtained from crossing of 25 sterile inbred lines with male fertile lines ‘N-1172’ and ‘N-1185’ as testers have been studied. The tests were carried out on the plot of 8.0m² in a triple sequence with seeding rate of 500 kernels per 1m². The productivity of the hybrids F₁ ranged from 70.2 till 90.6 hwt/ha (tester ‘N-1172’) and from 71.5 till 102.6 hwt/ha (tester ‘N-1185’). On the whole the number of hybrids F₁ with significant heterosis of productivity was 13 per 50 (or 26%). Both a general and specific combining ability (F_fact.= 2.41 and 2.32 respectively with F₀₅ =1.63) contributed a lot in the dispersion of the trait of productivity. The sterile analogs of the lines ‘N-325’, ‘N-1078’, ‘N-1179’, ‘N-1238’,‘N-1276’ and the line-tester ‘N-1185’ showed a reliably high GCA. The lines ‘N-48’, ‘N-71’, ‘N-463’, ‘N-700’ and ‘N-1179’ showed high effect of SCA. A significant difference in a combining value of the studied line-testers has been established. It has been noted that the level of their own productivity is the most important sign for selection of the lines on GCA.

озимая рожь, инбредные линии, цитоплазматическая мужская стерильность (ЦМС), тестер, гибрид, урожайность, общая и специфическая комбинационная способность, winter rye, inbred lines, cytoplasmic male sterility (CMS), tester, hybrid, productivity, general and specific combining ability

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