| 小麦育种中杂交亲本选配的组合表现指数法 |
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| 引用本文： | 张爱民. 小麦育种中杂交亲本选配的组合表现指数法[J]. 中国农业科学, 1992, 25(3): 33-36 |
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| 作者姓名： | 张爱民 |
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| 作者单位： | 北京农业大学小麦遗传育种研究室，北京 100094 |
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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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| 摘 要： | 本文探讨结合遗传差异和育种目标进行小麦育种亲本选配的问题。提出了亲本选配的组合表现指数法：CP1=D#+2/SSD，CP1（Cross Performance lndex）即组合表现指数，D#+2为亲本间遗传距离，SSD为由这些亲本杂交产生的后代性状群体平均值与相应的育种目标值的加权离差平方和。CPl大的组合优于CP1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。
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| 关 键 词： | 杂交育种 遗传距离 亲本选配 小麦 复合杂交 组合表现指数 |
A NEW METHOD FOR PARENT SELECTION IN WHEAT BREEDING-CROSS PERFORMANCE INDEX |
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| Zhang Aimin Zhang Shuzhen Huang Tiecheng. A NEW METHOD FOR PARENT SELECTION IN WHEAT BREEDING-CROSS PERFORMANCE INDEX[J]. Scientia Agricultura Sinica, 1992, 25(3): 33-36 |
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| Authors: | Zhang Aimin Zhang Shuzhen Huang Tiecheng |
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| Abstract: | Parent selection based on genetic distance of quantitative characteristics of parents and breeding objectives was approached 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 SSD the weighed sum 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 cross and double cross, were given. |
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| Keywords: | Crossdreeding Genetic distance Parent selection Wheat Multiple cross Cross performance index |
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