摘要:
为明确中国南瓜第1雌花节位的遗传规律,选用中国南瓜杂交组合89-1×93-5的P1、P2、F1、F2、BCP1、BCP2的6个世代为研究对象,应用植物数量性状的主基因+多基因遗传模型研究其遗传规律。结果表明,该群体第1雌花节位的遗传符合2对加性-显性-上位性主基因+加性。显性多基因混合遗传模型。2对主基因的加性效应均为0.068 4,均使第1雌花节位升高;显性效应分别为-4.826 5和-0.905 8。多基因的加性效应和显性效应分别3.008 5和-1.566 8。其主基因遗传率在BCP1、BCP2、F2分别为74.34%、68.17%、89.84%,多基因遗传率在BCP1、BCP2、F2均为0;说明主基因表现出较高的遗传力,可以在早期世代对第1雌花节位进行选择。
Abstract:
To understand the genetics of the 1st-node-female-flower of Cucurbita moschata,the mixed major gene plus polygene inheritance model was used.The inheritance of the 1st-node-female-flowers in 6generations(i.e.,P1,P2,F1,F2,BCP1 and BCP2)derived from the hybrid combinations of C.moschata89-1×93-5 was investigated.The results showed that the traits of the 1st-node-female-flowers were controlled by two major genes with additive-dominance-epistemic effects and the polygenes with additive-dominance effects model in the joint analysis of 6generations.The additive effects of the two major genes were 0.068 4,indicating an increase of the 1stnode-female-flowers;the dominance effects of the two major genes were-4.826 5and-0.905 8,respectively;and,the polygenes additive and dominance effect were 3.008 5and-1.566 8,respectively.The major gene hereditabilities of BCP1,BCP2 and F2 populations were 74.34%,68.17% and 89.84%,respectively,and the polygene hereditability was 0,indicating that the higher hereditability of the major genes could be favorable to an efficient selection in early generation of breeding.
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