| 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,D2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。 |
| 关键词: 遗传距离 亲本选配 小麦 复合杂交 组合质量指数 |
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| 基金项目:国家教委博士点基金资助课题 |
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| Abstract: |
| 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 paren... |
| Key words: genetic distance parent selection wheat multiple cross cross performance index |
