| 摘要: |
| 本文对中国美利奴羊(军垦型)应用多变量线性模型方法,分析近交对生产性能的影响,在各主要经济性状中,遗传力高的性状近交衰退较小,遗传力中等和低的性状近交衰退较大。选择能有效地克服近交的影响,对遗传力高的性状,加强选择克服近交衰退较强。采用指数选择克服近交衰退效果较好。利用双亲亲缘系数估测后代生产性能可早期预测近交衰退。 |
| 关键词: 近交衰退 近交系数 选择强度 |
| DOI： |
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| 基金项目: |
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| INBREEDING DEPRESSION IN CHINESE MERINOS AS WELL AS THE METHOD TO OVERCOME AND PREDICT |
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| Abstract: |
| Effects of inbreeding on Chinese Merino(Junken type)as well as the method to overcome and predict inbreeding depression have been discussed.The experiment was carried out in Ziniguan State Stud Farm.The date came from 270 rams and 460 ewes.Several conclusions have been obtained by date analysis The multivariate liner model can be used to study accurately inbreeding depression.Adjustments for some enviromental factors:(1)the year of lamb born.(2)single VS.multiple birth.(3)dam's age enhanced accuracy of anal... |
| Key words: inbreeding degeneration inbreeding coefficient selection in tensity |
