摘要
选用8个籼型光温敏不育系作母本,30个恢复系品种作父本,共配制两系杂交水稻组合74个,进行两系杂交水稻糙米率配合力遗传研究.结果表明:1)两系法杂交水稻杂种F1谷粒的糙米率与父本(恢复系)和双亲平均的谷粒糙米率呈极显著正相关,相关系数为0.3123和0.3068;与母本(不育系)谷粒糙米率相关不显著,相关系数为0.1031.2)6×6不完全双列杂交法配合力分析结果表明,两系杂交水稻糙米率性状的表现在组合间差异极显著;父、母本的一般配合力效应和组合的特殊配合力效应差异显著;父、母本的一般配合力作用大于组合的特殊配合力作用,一般配合力方差占总个基因型方差的65.02%,特殊配合力方差占34.98%;一般配合力作用,父本的作用(基因型方差为63.70)大于母本的作用(基因型方差为55.34).
74 combinations were obtained by crossing 8 photo-thermo-sterilities with 30 restoring line varieties, and their combining ability of brown rice percentage was studied. The main results were as follows: 1) Brown rice percentage of hybrids (Fi) was significantly positively correlated with that of the male parentages and the mean level of two parents, and the correlation coefficient were 0.312 3 and 0.306 8; slightly positively correlated with brown rice percentage of the female parentages, and the correlation coefficient is 0.103 1. 2) The difference of brown rice percentage was significant among combinations; The difference of brown rice percentage between general combining ability (GCA) and special combining ability (SCA) of combinations was significant; The brown rice percentage of hybrids was controlled by GCA and SCA, and GCA of parents, especially the restoring line parents, played a more important role. percentage in rice hybrids (FD by two-line system were At last, the breeding methods of improving brown rice discussed.
出处
《湖南农业大学学报(自然科学版)》
CAS
CSCD
北大核心
2007年第5期518-521,共4页
Journal of Hunan Agricultural University(Natural Sciences)
基金
国家自然科学基金项目(30150004)
国家"863"计划项目(Z16-01-01)
湖南省自然科学基金项目(05JJ20008)
关键词
两系法
杂交水稻
糙米率
相关分析
配合力
two-line system
hybrid rice
brown rice percentage
genetic correlation
combining ability