爆裂玉米雄穗性状主基因+多基因遗传分析

Genetic analysis on major genes and polygenes of tassel characters of popcorn

应用植物数量性状主基因+多基因混合遗传模型,以爆裂玉米杂交组合吉爆902的P1、F1、P2、B1∶2、B2∶2和F2∶36个家系世代群体为材料,对雄穗性状进行多世代联合分析。结果表明:爆裂玉米雄穗长度由1对完全显性主基因+加性-显性多基因控制遗传;雄穗分枝数由多基因控制遗传。B1∶2、B2∶2、F2∶3三个家系世代雄穗长度主基因遗传率分别为54.01%、58.88%、58.62%,雄穗分枝数多基因遗传率分别为86.82%、85.28%、84.82%。

The P1, F1, P2, B1：2, B2：2 and F2：3 six genealogical populations of the popcorn hybrid combination Jibao 902 were used as test materials, and their multiple generations＇ tassel traits were ana- lyzed by means of the major genes ＋ polygenes mixed genetic model of plant quantitative traits. The re- suits showed that the inheritance of the tassel length was controlled by a pair of completely dominant major genes ＋ additive-dominance polygenes, and that of the tassel branch number by polygenes. The B1：2 ,B2：2 and F2：3 three genealogical populations were respectively 54.01% ,58.88% and 58.62% in major gene heritability of tassel length,and respectively 86.82% ,85.28% and 84.82% in polygenic heritability of tassel branch number.