| Effect of Genetic Connectedness on the Selection Results of Breeding Pigs |
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| 引用本文： | ZHANG Hao LI Jia-qi WANG Chong LIU Xiao-hong CHEN Yao-sheng. Effect of Genetic Connectedness on the Selection Results of Breeding Pigs[J]. 中国农业科学(英文版), 2005, 4(11): 872-876 |
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| 作者姓名： | ZHANG Hao LI Jia-qi WANG Chong LIU Xiao-hong CHEN Yao-sheng |
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| 作者单位： | Department of Animal Genetics and Breeding, College of Animal Science, South China Agricultural University, Guangzhou 510642, P.R.China |
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| 基金项目： | We would thank Professor Shi Zhendan in our college for his help to this paper. The project is financially supported by Major Scientific Research Project of Guangdong Province, China （2003A2010601）. |
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| 摘 要： |
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| 关 键 词： | 猪 生长性能 基因 连通性 选择性 种质资源 |
Effect of Genetic Connectedness on the Selection Results of Breeding Pigs |
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| ZHANG Hao,LI Jia-qi,WANG Chong,LIU Xiao-hong,CHEN Yao-sheng. Effect of Genetic Connectedness on the Selection Results of Breeding Pigs[J]. 《Agricultural Sciences in China》, 2005, 4(11): 872-876 |
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| Authors: | ZHANG Hao LI Jia-qi WANG Chong LIU Xiao-hong CHEN Yao-sheng |
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| Abstract: | Two pig populations were simulated with Monte Carlo method; each consisted of 5 boars and 50 sows per generation. Genetic connectedness between herds was established by randomly selecting 1 or 2 boars from one population to mate sows of the other population. Breeding pigs were selected within populations according to animal model BLUP. The benefits of genetic connectedness between herds were examined. The results showed that, the average coefficients of inbreeding decreased, while the cumulative selection responses of populations increased, and the higher response occurred randomly in the two populations at generation 5 with the increase of the genetic connectedness between herds. Selection response was affected by genetic connectedness and trait heritability, the lower heritability and higher connectedness, the better selection results. When the number of exchanged litters between populations per generation was 6 litters, the selection results reached a reflection point; if the number of exchanged litters between populations increased further from this point, neither the increase of the cumulative selection responses nor the decrease of coefficients of inbreeding was significant. |
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| Keywords: | Pigs Genetic connectedness Cumulative selection response Coefficient of inbreeding |
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