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为探讨玉米茎秆木质素含量的遗传基础,以WBA31×K4138构建的DH群体及其亲本为试验材料,采用P1、P2与DH群体3世代主基因+多基因联合分离分析模型对玉米吐丝期茎秆木质素含量进行了遗传分析。结果表明,2012年和2013年玉米茎秆木质素含量遗传均符合两对互补作用主基因+多基因模型遗传(E-1-7),主基因遗传率分别为44.84%和57.46%,多基因遗传率分别为25.51%和32.49%。茎秆木质素含量以主基因遗传为主,但多基因遗传贡献也比较大,同时环境因素对茎秆木质素含量的遗传有一定影响。建议在改良玉米茎秆木质素含量时,既要兼顾主基因和多基因的共同利用,也要注重环境条件的影响。
In order to explore the genetic basis of lignin content in corn stalks, the DH population and its parents constructed by WBA31 × K4138 were used as experimental materials. The 3-generation major gene plus polygene combined with P1, P2 and DH populations Stem lignin content of genetic analysis. The results showed that the inheritance of lignin content of corn stalk in 2012 and 2013 both accorded with two major pairs of complementary gene + polygene model (E-1-7), the heritability of major genes were 44.84% and 57.46% The heritabilities were 25.51% and 32.49% respectively. The lignin content of culm mainly dominated by major genes, but the genetic contribution of polygenes was also relatively large. At the same time, the environmental factors had certain influence on the inheritance of lignin content of culm. It is suggested that when improving the lignin content of corn stalk, it is necessary to take into account the common use of major genes and polygenes, and also pay attention to the influence of environmental conditions.