杂交水稻亲本产量相关性状的配合力分析

目的]分析杂交水稻亲本产量相关性状的配合力。方法]以5个三系不育系和5个恢复系采用不完全双列杂交(NCⅡ)设计,对产量相关性状进行了配合力分析。结果]F_1产量相关性状的遗传同时受加性效应和非加性效应控制;在单株产量上,不育系一般配合力由大到小依次为301A、421A、606A、五丰A、贡A,恢复系一般配合力由大到小依次为R208、R615、玉桂、华占、R319;狭义遗传力的由大到小依次为千粒重、穗颈长、穗长、穗总粒数、穗实粒数、剑叶长、单株有效穗、株高、结实率、播始历期。结论]该研究为亲本材料的合理利用提供理论依据。

Combining Ability Analysis of Yield-related Traits on Parents of Hybrid Rice

Objective]To analyze the combining ability of yield-related traits on parents of hybrid rice.Method]The combining ability of yield-related traits was synthetically studied based on NCⅡ mating design by using 5 indica CMS lines and 5 restorer lines.Result]Heredity of F1yield related traits were controlled by additive effect and non-additive effect.For yield per plant,general combining ability of indica CMS lines from big to small was in the order of 301A, 421A, 606A,Wufeng A, Gong A.General combining ability of restorer lines from big to small was in the order of R208, R615, Yugui, Huazhan, R319.The narrow heritability from big to small was in the order of 1 000-grain weight,length of spike neck,ear length,total grains per ear,filled grain per ear,flag leaf length,effective ear per plant,plant height,seed-setting rate, duration from sowing to heading.Conclusion]This research provided theoretical basis for the rational utilization of parent material.