高粱穗部7个性状的遗传分析

对高粱穗部7个性状进行遗传分析，确定了高粱穗粒重的遗传显性基因效应占优势；千粒重的遗传存在二基因互作；穗长的遗传受上位成分的超显性控制；穗宽的遗传受加性基因作用所左右；一级枝梗的遗传受加性和非加性基因作用控制；二级枝梗和三级枝梗的遗传受显性基因效应主导。由此可知，穗部大多数性状的遗传，都在受加性和非加性遗传成分的控制。因此，通过高粱群体改良交互轮回以及复式杂交育种，都可使穗部育种取得较大进展。

A Genetic Study on Sorghum Panicle Characters

The genetic analysis of 7 panicle characters in sorghum showed that the dominant gene effectwas predominant in the inheritance of grain weight per panicle. The inheritance of seed mass was controlled by the interaction of two genes and panicle length and width by superdominant and additive genesrespectively. The primary branch inheritance was attributed to both the additive and nonadditive gene effects and the secondary and the third branches attributed to the dominant gene effect. Therefore, the inheritance of most of the characters in sorghum panicle were under the control of additive and nonadditivegenes. By using recurrent selection and hybridization breeding, great progress would be made to improvethe panicle characters.