Document Detail


Genetic diversity and differentiation of Mongolian and Russian yak populations.
MedLine Citation:
PMID:  16130478     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
In this study we examined the genetic diversity of yak populations in the northernmost part of their current global distribution. Five Mongolian and one Russian yak populations as well as one Chinese yak population from the Qinghai-Tibetan Plateau, the putative centre of yak domestication, were analysed with 15 microsatellite loci to determine the level of genetic variation within populations as well as the genetic differentiation and relationship between populations. A total of 116 microsatellite alleles were identified. The mean number of alleles per locus (MNA) across populations was 7.73 +/- 1.98 and the mean expected heterozygosity (HE) was 0.696 +/- 0.026. The relative magnitude of gene differentiation (F(ST)) among populations was 4.1%, and all genetic differentiations (F(ST)) between populations were significant (p < 0.001). A significant inbreeding effect (F(IS)) was detected in the Hovsgol yak (p < 0.01). There was no indication of a recent bottleneck in any of the populations studied. The results showed that yak populations in Mongolia and Russia have maintained high genetic diversity within populations and a low, although significant, genetic differentiation between populations. Both phylogenetic and principal component analyses support a close genetic relationship between the Gobi Altai, south Gobi and north Hangai populations, and between the Hovsgol and Buryatia populations respectively. Our results indicate that these yak populations should be considered as distinct genetic entities in respect of conservation and breeding programmes.
Authors:
Q Xuebin; H Jianlin; B Lkhagva; I Chekarova; D Badamdorj; J E O Rege; O Hanotte
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of animal breeding and genetics = Zeitschrift für Tierzüchtung und Züchtungsbiologie     Volume:  122     ISSN:  0931-2668     ISO Abbreviation:  J. Anim. Breed. Genet.     Publication Date:  2005 Apr 
Date Detail:
Created Date:  2005-08-31     Completed Date:  2005-11-21     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  100955807     Medline TA:  J Anim Breed Genet     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  117-26     Citation Subset:  IM    
Affiliation:
State Key Laboratory of Arid Agro-Ecology, School of Life Sciences, Lanzhou University, Lanzhou, China.
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MeSH Terms
Descriptor/Qualifier:
Animals
Cattle / genetics*
Cluster Analysis
DNA Primers
Evolution, Molecular*
Gene Frequency
Genetic Variation*
Genetics, Population*
Geography
Linkage Disequilibrium
Microsatellite Repeats / genetics
Models, Genetic
Mongolia
Phylogeny*
Principal Component Analysis
Russia
Species Specificity
Chemical
Reg. No./Substance:
0/DNA Primers

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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