| 摘要: |
| 本文对内蒙古嘎达苏种畜场良种细毛羊600只左右母羊11个性状估测了遗传力,表型相关和遗传相关。根据估测的遗传参数,探讨了提高良种细毛羊生产性能的优化选种方法。在育种上得出下列结论:断奶重可作为早期选择性状;要特别注意对净毛量的选择;对体重进行合并选择其遗传进展比个体选择高18%;制订的9个选择指数可适应不同选种方向的需要,其中指数:I1=3.1737×净毛量(公斤)+0.2283×剪毛后体重(公斤)I3=3.0239×净毛量(公斤)+0.1831×剪毛后体重(公斤)-0.3910×周岁毛长(厘米)Ie=1.9798×剪毛量(公斤)+0.2055×剪毛后体重(公斤)的理论选择反应较理想,推荐在生产中试用。 |
| 关键词: 表型相关 遗传相关 净毛量 良种细毛羊 遗传参数 主要经济性状 断奶重 体重 剪毛量 遗传力 |
| DOI： |
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| A STUDY ON THE GENETIC PARAMETERS AND OPTIMIZING SELECTION METHODS OF THE MAJOR TRAITS FOR IMPROVING THE EXCELLENT FINE-WOOL SHEEP |
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| Abstract: |
| Data on about 600 ewe hoggets of the Excellent Fine-Wool Sheep in Ga Ta Su State Stock Farm were analysed in obtaining the heritabiliti- es,phenotypic and genetic correlations of its eleven traits.According to the genetic parameters,some optimizing selection methods were invest- igated for improving the production performance of the Excellent Fine- Wool Sheep. Some conclusions in the breeding of the Excellent Fine-Wool Sheep were reached as a result of the analysis: Weaning weight might be used as a selecti... |
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