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以沈农 8936 6等 4个亲本进行完全双列杂交 ,对水稻穗颈和第 2节间大、小维管束数采用加性 -显性模型进行遗传分析 .结果表明 :维管束性状的遗传以加性效应为主 ,狭义遗传力介于 0 4 15 1～ 0 5 5 19之间 .显性效应值达到显著水平的杂交组合和性状不多 ,杂种优势较弱 .穗颈大维管束数与 1次枝梗数、2次枝梗数、2次枝梗颖花数、结实率、穗颈小维管束数与 1次枝梗数、第 2节间小维管束数与 2次枝梗数及 2次枝梗颖花数之间具有显著或极显著的加性相关 ,可作为间接选择的参考指标
The complete diallens were crossed with 4 parents including Shennong 8936 6 and the large and small vascular bundles were analyzed by additive-dominance model.The results showed that the inheritance of The additive effects are dominant and the narrow heritability is between 0 4 15 1 and 0 5 5 19. The number of hybrid combinations and traits with significant dominant effect values is low and the heterosis is weak.The number of big vascular bundles The number of primary branches, the number of secondary branches, the number of secondary branches and spikes, the rate of seed setting, the number of primary vascular bundles and primary branches, the number of secondary vascular branches and secondary branches and the number of secondary branches There is a significant or extremely significant additive relationship between stems and spikes, which can be used as a reference index for indirect selection