摘要
母本株高、结实率和收获指数的GCA;父本抽穗期、株高、每穗总粒数、结实率和千粒重的GCA以及千粒重的SCA与年份之间都存在显著互作。多数性状的GCA具有较高的稳定性,不同年份的GCA效应相似性较大;而SCA的稳定性除了抽穗期、株高和每穗实粒数较高以外,其余性状均较低,不同年份SCA效应的相似性亦较差。认为根据一年试验得到的GCA效应具有一定的参考价值;而SCA效应需经多年或多点鉴定。
The combining ability for 8 characters in hybrid rice (O. sativa L. ssp
sinica, or japonica ) was studied in a 7×5 diallel system. Most of the traits of
F1 hybrids were affected by both GCA effects of A and R lines and SCA effects
of their combinations. The panicle number per plant, however, was mainly
affected by GCA effects of A lines, and the grain yield per plant was unaffected
by GCA effects of R lines. GCA effects of A and R lines played a more
important role as compared with SCA effects. As for GCA effects, A lines
were more important than R lines. It was considered that greater attention
should be devoted to the development of A lines, and the high yield potential of
R lines and diversity of restorer sources should also be considered in the breed
ing of hybrids with strong heterosis. The results also indicated that there was a
very close and consistent positive relationship between heterosis and com
bining ability, implying that the heterosis of a hybrid combination could be pre
dicted trustworthyly by combining ability.
出处
《江苏农业学报》
CSCD
1989年第2期1-6,共6页
Jiangsu Journal of Agricultural Sciences
关键词
水稻
配合力
互作效应
经济性状
Hybrid rice
Oryza sativa ssp. sinica
Combining ability
Heterosis
