| 摘要: |
| 建立了在各种约束条件下的综合选择指数（无约束、约束和最宜３种选择）的通径分析化模型。该模型可以分析出选择指数中任一性状xi对由它而使聚合遗传经济值H的相关进展ＣＧＳH(i)的直接贡献ａi和xi通过xi对ＣＧＳH(i)的间接进展rpijaj，给出xi与H之间的全部路径信息，以确定主选性状、辅助性状和限制性状。结果表明，好的选择指效应由生物和经济的双重意义来确定。约束选择指数在育种上改变了经济权重的无约束选择，经济权重的改变是由约束条件引起的。 |
| 关键词: 约束选择指数，通径分析，经济权重，无约束选择指教 |
| DOI： |
| 分类号:S11 |
| 基金项目: |
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| A Path Analytical Model of Restricted Selection Index |
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| Abstract: |
| A path analytical model of comprebensive selection indexes (unrestricted, restricted, and optimum)was established under all the restricted conditions. The direct contribution value ai of any traits xi in the index to CGSH(i) of the aggregate genetic economic value H, and the indirect contribution value rpijaj of xi to CGSH(i) through xj can be obtained with the model.This indicates that the total path information between xi and H can also be obtained,and the primary selection trait together with the auxiliary and restricted traits can,therefore, be determined.The stuty shows that a good index should be determined both with biological and economic significances. But the restricted selection index, in terms of breeding science,is a unrestricted selection one, of which the economic weight has been changed,whereas the change of the economic weight is caused by the restricted conditions. |
| Key words: Restricted selection index,path analysis,economic weight, unrestricted selection index |
