Microsatellite-Based Genetic Differentiation and Phylogeny of Sheep Breeds in Mongolia Sheep Group of China  

作　　者：SUN Wei CHANG Hong Musa Hussein Hassan LIAO Xin-jun CHU Ming-xing Kija James 

机构地区：[1]Animal Science and Technology College, Yangzhou University, Yangzhou 225009, P.R.China [2]Faculty of Veterinary Science, University of Nyala, Nyala 155, Sudan [3]Key Laboratory of Farm Animal Genetic Resources and Utilization, Ministry of Agriculture/Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, P.R.China [4]Queensland Bioscience Precinct, 306 Carmody Road, St Lucia, QLD, 40723, Australia

出　　处：《Agricultural Sciences in China》2011年第7期1080-1087,共8页中国农业科学（英文版）

基　　金：supported by the earmarked fund for China Agriculture Research System (CARS-39);the International Cooperation Item of the National Natural Science Foundation of China (30410103150);the China Postdoctoral Science Foundation Special Funded Project (200902154);the China Postdoctoral Science Foundation (20080430470);the Key Technologies R&D Program of China during the 11th Five-Year Plan period (2006BAD13B08-07);the Natural Science Foundation of Jiangsu Province of China (BK2007556);the Basic Natural Science Foundation for Colleges and Universities, Jiangsu Province of China (NK051039);the Northern Jiangsu Technology Development Plan of China (BN2010004);the Science and Technology Program of Suzhou City of Jiangsu Province of China (SNG0911);the Jiangsu Government Scholarship for Overseas Studies Project, China

摘　　要：In the present study we studied the genetic structure of five Chinese sheep populations of Hu sheep, Tong sheep, Small-tailed Han sheep, Tan sheep, and Wadi （WD） sheep using 15 microsatellite loci. The results showed that the FIT, FST, and FIS statistics computed for the complete dataset had the following values, 0.523±0.140, 0.363±0.131 and 0.263±0.092, respectively. All loci were significantly contributed to the genetic differentiation among population （P0.001）. There is no relationship between the scatter of pairwise FST geographical distance points as geographical distance increases between the five populations. Membership probabilities and genetic structure of sheep populations were estimated when K=2, the populations were classified into Hu, Tong, Han and WD, and Tan sheep group. However, when K=3, the populations were classified into Hu and Tong, Han and WD, and Tan sheep group. The findings supported the previous literatures that these populations are originated on different time stages from the primogenitor population and communicated genetically with each other by natural and artificial selection in different ecological environment.In the present study we studied the genetic structure of five Chinese sheep populations of Hu sheep, Tong sheep, Small-tailed Han sheep, Tan sheep, and Wadi （WD） sheep using 15 microsatellite loci. The results showed that the FIT, FST, and FIS statistics computed for the complete dataset had the following values, 0.523±0.140, 0.363±0.131 and 0.263±0.092, respectively. All loci were significantly contributed to the genetic differentiation among population （P0.001）. There is no relationship between the scatter of pairwise FST geographical distance points as geographical distance increases between the five populations. Membership probabilities and genetic structure of sheep populations were estimated when K=2, the populations were classified into Hu, Tong, Han and WD, and Tan sheep group. However, when K=3, the populations were classified into Hu and Tong, Han and WD, and Tan sheep group. The findings supported the previous literatures that these populations are originated on different time stages from the primogenitor population and communicated genetically with each other by natural and artificial selection in different ecological environment.

关 键 词：genetic differentiation genetic phylogeny microsatellite DNA Mongolian sheep 

分 类 号：S828.2[农业科学—畜牧学] Q943[农业科学—畜牧兽医]