小麦育种中杂交亲本选配理论与方法的研究 Ⅲ.组合质量指数法  

STUDIES ON THE THEORY AND METHODS OF PARENT SELECTION IN WHEAT BREEDING Ⅲ.CROSS PERFORMANCE INDEX

作　　者：张爱民[1] 张树榛[1] 黄铁城[1] 

机构地区：[1]北京农业大学农学系

出　　处：《北京农业大学学报》1991年第3期1-4,共4页

基　　金：国家教委博士点基金资助课题

摘　　要：本文探讨结合遗传差异和育种目标进行小麦育种中亲本选配的问题。提出了亲本选配的组合质量指数法:CPI=D^2/SSD。CPI(Cross Performance Index)即组合质量指数,D^2为亲本间遗传距离,SSD 为由这些亲本杂交产生的后代群体平均与育种目标的加权离差平方和。CPI 大的组合优于 CPI 小的组合。作者还提出了一种计算复交组合亲本间遗传距离的方法。Parent selection based on genetic distance of quantitative characte- ristics of parents and breeding goals was attempted in this paper.A.new method named Cross performence Index-- CPI was proposed:CPI=D^2/SSD,where D^2 is genetic distance between parents and SSO the weighted sam of square deviation as in the least-square method proposed by Pederson(1981).The crosses whose CPI is greater are better than those whose CPI is smaller.A method for calculating the genetic distance among the materials used as parents in multiple crosses,for example three-way crosses and double crosses,was given.

关 键 词：小麦 杂交 亲本选配 组合质量指数 

分 类 号：S512.103.5[农业科学—作物学]