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

doi:10.1016/S1671-2927(11)60097-7

摘要/Abstract

摘要： In the present study we studied the genetic structure of five Chinese sheep populations of Hu sheep, Tong sheep, SmalltailedHan sheep, Tan sheep, and Wadi (WD) sheep using 15 microsatellite loci. The results showed that the FIT, FST, andFIS 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 (P<0.001). There is norelationship between the scatter of pairwise FST geographical distance points as geographical distance increases betweenthe five populations. Membership probabilities and genetic structure of sheep populations were estimated when K=2, thepopulations were classified into Hu, Tong, Han and WD, and Tan sheep group. However, when K=3, the populations wereclassified into Hu and Tong, Han and WD, and Tan sheep group. The findings supported the previous literatures thatthese populations are originated on different time stages from the primogenitor population and communicated geneticallywith each other by natural and artificial selection in different ecological environment.

关键词:

genetic differentiation, genetic phylogeny, microsatellite DNA, Mongolian sheep

Abstract: In the present study we studied the genetic structure of five Chinese sheep populations of Hu sheep, Tong sheep, SmalltailedHan sheep, Tan sheep, and Wadi (WD) sheep using 15 microsatellite loci. The results showed that the FIT, FST, andFIS 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 (P<0.001). There is norelationship between the scatter of pairwise FST geographical distance points as geographical distance increases betweenthe five populations. Membership probabilities and genetic structure of sheep populations were estimated when K=2, thepopulations were classified into Hu, Tong, Han and WD, and Tan sheep group. However, when K=3, the populations wereclassified into Hu and Tong, Han and WD, and Tan sheep group. The findings supported the previous literatures thatthese populations are originated on different time stages from the primogenitor population and communicated geneticallywith each other by natural and artificial selection in different ecological environment.

Key words:

genetic differentiation, genetic phylogeny, microsatellite DNA, Mongolian sheep

SUN Wei, CHANG Hong, Musa Hussein Hassan, LIAO Xin-jun, CHU Ming-xing , Kija James. Microsatellite-Based Genetic Differentiation and Phylogeny of Sheep Breeds in Mongolia Sheep Group of China[J]. Journal of Integrative Agriculture, 2011, 10(7): 1080-1087.

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