摘要:
千粒重是水稻产量的重要构成要素。选用该性状差异较大的亲本,进行杂交,得F1代,再将F1代自交获得F2代,构建P1、F1、P2和F2世代,并对这4个世代的这个性状进行考查。利用亲本、F1和F24个世代进行数量性状主基因+多基因混合遗传分析,选出最适模型,并对模型的遗传估计值进行分析,从而得出相关结论。经检测这2个组合的千粒重遗传分离模式均属于C-0模式,且千粒重主基因遗传率为0.86%~0.97%,多基因遗传率为68.06%~80.33%,两者合计的遗传率为68.92%~81.30%。
Abstract:
Thousand-grain weight(TGW)is one of the important indicators for rice yield determination.For the study,F1rice crossed from parents with significant difference on TGW and its F2by self-crossing the F1 were used. The TGW traits of P1,F1,P2and F2 were the basis for the evaluation.An optimal model was selected from the quantitative trait master+ multi-gene mixed inheritance models.The genetic prediction by the model indicated that the TGW of the crossed rice varieties followed a C-0mode,and the inherant rate of the main genes was 0.86%-0.97% while that of the multiple genes 68.06%-80.33%.The combined,overall rate for the genes to pass on from one generation to the next was 68.92%-81.30%.
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