摘要
为了对玉米行粒数进行遗传改良,以PH6WC/7873(组合Ⅰ)和MX002/MS001(组合Ⅱ)的6个世代(P1、P2、F1、B1、B2、F2)为材料,利用植物数量性状主基因+多基因混合遗传模型,研究了玉米行粒数的主基因+多基因遗传规律。结果表明,组合Ⅰ的行粒数符合加性-显性-上位性多基因遗传模型(C-0模型)。组合Ⅱ的行粒数符合2对加性主基因+加性-显性多基因遗传模型(E-3模型)。组合Ⅰ3个分离世代的行粒数多基因遗传率分别为75.13%、74.51%、82.59%。组合Ⅱ3个分离世代的行粒数多基因遗传率分别为73.50%、73.20%、72.40%;主基因遗传率分别为6.40%、8.90%、9.10%。以多基因遗传为主,应采用轮回选择和聚合回交的方法积累微效基因,对玉米行粒数进行遗传改良。
To improve the kernel number per row in maize,six generations （P1 ,P2 ,F1 ,B1 ,B2 ,F2 ） of PH6WC/7873 （cross I ） and MX002/MS001 （cross II ） were taken as materials to study the genetic rule of kernel number per row by using the joint segregation analysis of major gene plus polygene mixed inheritance model. The results showed that the kernel number per row was controlled by additive-dominance and dominanee-epistasis polygene in crosse I, while it was controlled by two additive major genes and additive-dominance polygene in cross II , In cross I, the heritability of polygene in B1, B2 and F2 generation was 75.13 %, 74.51 % and 82.59%, respectively. In crosse II ,the heritability of polygene in B1 ,B2 and F2 generation was 73.50% ,73.20% and 72.40% respectively,and the heritability of major gene was 6.40%,8.90% and 9. 10% respec tively. The kernel number per row was mainly controlled by polygene in the two crosses. The re current selection and polymerization backcross could be adopted to accumulate the minor genes for the genetic improvement of kernel number per row in maize.
出处
《河南农业科学》
CSCD
北大核心
2013年第2期30-33,40,共5页
Journal of Henan Agricultural Sciences
基金
河南省重点科技攻关项目(102102110165)
关键词
玉米
行粒数
主基因+多基因
遗传分析
maize
kernel number per row
major gene＋ploygene
genetic analysis
