核农学报2012，Vol.26Issue(2)：280-287,8.
玉米雄穗主轴长度和分枝数的主基因＋多基因遗传分析
GENETIC ANALYSIS OF BRANCH NUMBER AND SPINDLE LENGTH OF MAIZE TASSEL BY MAJOR GENES PLUS POLYGENES MODEL
摘要
Abstract
The joint segregation analysis of major genes plus polygenes mixed inheritance model was conducted to study the genetics of branch number and spindle length of maize tassel. The 6 generations （P1, P2, F1, B1, B2, and F2） of 2 crosses, PH4CV/Chang 7 -2 （cross Ⅰ） and PH6WC/7873 （cross Ⅱ）, were grown in spring and summer seasons. Results suggested that in spring sowing environment, the branch number of tassel could be explained by genetic model E-l in both 2 crosses. In summer season, the optimal model was C-0 for cross Ⅰ, and E-3 for cross Ⅱ. In both environments, the spindle length of tassel was governed by model D-2 in cross Ⅰ, but by model D-3 in cross Ⅱ. In spring season, branch number of tassel in two crosses were controlled or mainly controlled by major genes. The effect of major genes on spindle length of tassel was equal to that of polygenes. In order to improve the efficiency of maize breeding, single cross or simple backcross could be adopted. In summer season, spindle length of tassel in two crosses and branch number of tassel in cross Ⅱ were controlled or mainly controlled by major genes. In order to improve the efficiency of maize breeding, repeated backcross or recurrent selection to cumulate positive alleles could be adopted.关键词
玉米/雄穗/主基因＋多基因/遗传分析Key words
maize/tassel/major genes plus polygenes/genetic analysis分类
农业科技引用本文复制引用
王铁固,马娟,张怀胜,陈士林..玉米雄穗主轴长度和分枝数的主基因＋多基因遗传分析[J].核农学报,2012,26(2):280-287,8.基金项目
河南省科技攻关项目（102102110165）,河南科技学院博士启动基金（2009012）. （）
