高丹草F2代农艺性状的数量遗传分析  

Genetic analysis of agronomic characters in F population of Sorghum bicolor×Sorghum sudanense

作　　者：董林洁 包曙光 康晨 谢晓东 罗峰 孙守钧 Dong Linjie;Bao Shuguang;Kang Chen;Xie Xiaodong;Luo Feng;Sun Shoujun(College of Agronomy and Resource Environment,Tianjin Agricultural University,Tianjin 300392,China)

机构地区：[1]天津农学院农学与资源环境学院,天津300392

出　　处：《天津农学院学报》2021年第3期6-11,共6页Journal of Tianjin Agricultural University

基　　金：农业农村部“引进国际先进农业科学技术”项目(2016-X09)。

摘　　要：以粒用高粱‘忻粱52’和苏丹草‘美引-48’杂交构建的F2代群体为试验材料,对F2代的叶片数、茎节数、株高、茎粗和蜡粉等5个农艺性状进行测定,并利用主基因+多基因混合遗传模型分析得到各性状的最适遗传模型及遗传率。结果表明:叶片数、茎粗的最适模型为Model A0,表明该性状不受主基因控制,为微效多基因控制的性状;茎节数和株高的最适模型为Model A4,为负向完全显性混合遗传模型,受一对主基因遗传,主基因遗传率分别为91.13%和66.14%;蜡粉的最适模型为Model B1,由两对主基因控制的加性-显性-上位性混合遗传模型,控制该性状的主基因遗传率为54.03%。In this study, the F2 generation population constructed by the cross between the grain Sorghum bicolor ‘Xinliang 52’ and Sorghum sudanense ‘Meiyin-48’ was used as the test material. Five agronomic characteristics of the F2 generation including leaf numbers, stem numbers, plant height, stem diameter and wax powder were measured, and the optimal genetic model and heritability of each trait were obtained by principal-multiple gene analysis. The results showed that the most suitable model for the number of leaves and stem diameter was Model A0. There was no major gene inheritance, but the quantitative trait inheritance controlled by micro-effect and multi-gene. The optimal model of stem numbers and plant height was Model A4, a negative full-dominant model controlled by a pair of major genes, and the major gene heritability were 91.13% and 66.14%. The optimal model of wax powder was Model B1, which belonged to the additive-dominant-epistatic mixed genetic model, controlled by two pairs of major genes with the heritability of the major gene of 54.03%.

关 键 词：高丹草 农艺性状 主基因+多基因分析 数量遗传 

分 类 号：S514[农业科学—作物学]