水稻空间诱变恢复系主要农艺经济性状配合力分析

Analysis on the Combining Ability of Main Agronomic and Economic Traits for Restorer Lines Derived from Space Mutation in Rice

以9个不育系和5个经空间诱变选育的恢复系(明恢63为对照)为材料,采用p×q不完全双列杂交(NCⅡ)对8个主要农艺经济性状进行了配合力分析和遗传力估算.结果表明,所有恢复系中,只有航恢七号在8个性状上的一般配合力都表现出正向效应,尤其在有效穗数、结实率、实粒数、千粒质量等性状上表现出较好的一般配合力,所配组合华优航七、川香优航七、天丰优航七、II优航七和培杂航七表现出较高的特殊配合力.航恢九号在单株穗质量、实粒数、千粒质量性状上,航恢八号在产量和结实率上,航恢88在有效穗数、单株穗质量、穗长、实粒数性状上表现出较高的一般配合力,这3个恢复系所配组合华优航九、培杂航九、天优航八、农丰优航八、沪优航八、67优88和十优88在产量性状上表现出较高的特殊配合力.这8个性状的遗传是由加性和非加性效应共同控制,主要以加性效应为主.

Nine sterile lines and 5 restoring lines selected from space induced mutants were used to analyze the combining ability and heritability of 8 agronomic and economic characters with a p × q in-complete diallele cross （NC Ⅱ） design. The results were as follows ： Among all the restorer lines tested, only Hanghui No. 7 showed positive effect on the eight traits, especially for the general combing ability （gca） in productive panicle number, seed setting rate, filled spikelets per panicle and 1000-grain mass, and the hybrid combinations derived from Hanghui No. 7, such as Huayouhangqi, Chuanxiangyouhangqi, Tianfengyouhangqi, Ⅱ youhangqi and Peizahangqi exhibited significant specific combing ability （sca）. General combing ability of Hanghui No. 9 in grain mass per plant, filled spikelets per panicle and 1000- grain mass was significant, and the gca of Hanghui No. 8 in grain yield and seed setting rate was significant too. Hanghui 88 showed high gca in productive panicle number, grain mass per plant, panicle length and filled spkikelets per panicle. The hybrid combinations Huayouhangjiu, Peizahangjiu, Tian- fengyouhangba, Nongfengyouhangba, Huyouhangba, 67you88 and Shiyou88 also showed high sca in grain yield. The results indicated that the eight agronomic and economic traits were controlled by both ad- ditive and non-additive effects were the principal one.