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

Abstract

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 (Ffact.= 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.

Keywords

• 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