摘要： 用4个不同来源的粳型光敏核不育系和8个恢复系组成4∗8不完全双列杂交，分析了抽穗期、株高、穗长、每穗总粒数、单株有效穗数、每穗实粒数、结实率和千粒重等9个主要农艺性状的一般配合力和特殊配合力效应以及F₁优势表现。结果表明，杂种性状主要受亲本一般配合力的作用，用亲本的一般配合力可预测杂种优势。一般配合力较强的不育系是91-32s,恢复系是C8420、9022和92016等，单株产量特殊配合力好的组合是91-32S/C8420和91-32S/92016分别比生产上大面积应用冀梗8号增产56.57%和51.81%.

关键词: 水稻, 光敏核不育系, 配合力, 优势

Abstract: Four Photoperiod sensitive genic male sterile lines of Keng rice and 8 restoring lines were used to make a 4∗8 incomplete diallel crosses. The heterosis and the combining ability of 9 main agronomic traits were analysed .The results were as follows: the characters of hybrid rice were main influenced by the GCA of parents. The heterosis could be predicted with GCA of its parents. The GCA of 91 32s in four PGMSR was the hightest, while the restoring lines C8420,9022 and 92016 had high GCA values in the most traits. The best combination for grain weight per plant was 91 32s/C8420 and 91 32s/92016,yield of the two hybrids increased 56.57% and 51.81% comparing with "Jikeng 8" used in production.

Key words: Rice, Photoperiodsensitive malesterile line, Combining ability, Heterosis

中图分类号: 

• S511.22