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以滇Ⅰ型杂交粳稻 (寻A×南 2 9- 2 )F1代花药培养的DH群体共 6 7系为材料 ,分析了穗长、一次枝梗数、穗颈长、实粒数 4个性状的遗传力和基因对数 ,4个性状的遗传力分别为 :0 70 16 ,0 4 0 87,0 75 0 3,0 5 86 1,基因对数分别为 :6 835 ,2 3 2 0 4 ,8 94 7,17 36 7对。通过穗长、一次枝梗数、穗颈长、实粒数 4个性状的偏度和峰度系数分析 ,发现 :控制穗长的多基因间无互作 ;控制一次枝梗数、穗颈长的多基因间可能存在互补作用 ,但把一次枝梗数分解成 3个等级后 ,即 1级为主穗一次枝梗数 ,2级为第 1分蘖的一次枝梗数 ,3级为第 2分蘖的 2次枝梗数 ,遗传力分别是 :0 2 0 6 0 ,0 2 0 4 6 ,0 135 6 ,基因对数分别为 :2 1 90 5 ,2 6 0 4 5 6 ,38 2 883对 ,基因间都无互补作用 ;影响实粒数的多基因间存在互补作用。
A total of 67 lines of DH population from F1 hybrids of Yunnan Ⅰ hybrid rice (A × N 2 9-2) were used as materials to analyze the effects of 4 traits of spike length, primary branch number, panicle neck length and grain number Heritability and gene logarithm, the heritability of 4 traits were 0 70 16, 0 0 87 0 75 0 3 0 5 86 1, the number of genes were 6 835, 2 3 2 0 4, 8 94 7,17 36 7 Yes. According to the analysis of skewness and kurtosis coefficient of four traits including spike length, primary branch number, ear length and number of real grains, it was found that there was no interaction among the multiple genes controlling spike length, However, after the number of primary branches is divided into three grades, that is, the number of primary branches at primary level 1, the number of primary branches at level 2 as primary tiller, and the number of secondary branches at level 3 as secondary tiller The numbers of stems and heritabilities were respectively: 0 2 0 6 0, 0 2 0 4 6, 0 135 6, and the number of genes was 2 1 90 5, 2 6 0 4 5 6, 38 2 883 pairs, respectively Complementarity; there are complementary effects between multiple genes that affect the number of real particles.