普通高粱与甜高粱杂交组合株高、糖度的主基因多基因模型遗传效应分析

对普通高粱与甜高粱杂交组合(石红137×L-甜)的株高与糖度进行主基因多基因遗传模型分析,以期研究株高、糖度的遗传效应。获得了2个性状的最适遗传模型,株高的最适遗传模型为2对完全显性主基因+加性-显性多基因混合遗传模型,主基因遗传率为74.4%,多基因遗传率为22.1%;糖锤度的最适遗传模型为1对加性-显性主基因+加性-显性-上位性多基因混合遗传模型,主基因遗传率为65.72%,多基因遗传率为20.43%。主基因个数和基因效应的预测与分子检测的主效QTL个数和基因效应基本相符。

GENETIC ANALYSIS OF PLANT HEIGHT AND BRIX VALUE BY USING MAJOR GENE AND POLYGENE INHERITANCE MODEL IN A CROSS BETWEEN COMMON SORGHUM AND SWEET SORGHUM

The method of major gene and polygene inheritance model was used to analyze the inheritance of plant height and brix value in a cross between common sorghum Shihong137 and sweet sorghum L-Tian. P1,P2,F1 and F2 of the cross were applied in this sutdy. The optimum model for plant height was two pairs of complete dominant major genes and additive and dominant polygene inheritance model. The inheritance rate of major genes was 74.4% and that of polygene was 22.1%. The optimum model of brix value was one pair of additive and dominant major genes and additive-dominant-epistasis polygene mixed inheritance model. The inheritance rate of major genes was 65.72% and that of polygene was 20.43%. The number of major genes and genetic effects were consistent with those of QTLs identified in the same cross.