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Evaluation of the genetic diversity and population structure of Chinese indigenous horse breeds using 27 microsatellite markers.

Abstract：

:We determined the genetic diversity and evolutionary relationships among 26 Chinese indigenous horse breeds and two introduced horse breeds by genotyping these animals for 27 microsatellite loci. The 26 Chinese horse breeds come from 12 different provinces. Two introduced horse breeds were the Mongolia B Horse from Mongolia and the Thoroughbred Horse from the UK. A total of 330 alleles were detected, and the expected heterozygosity ranged from 0.719 (Elenchuns) to 0.780 (Dali). The mean number of alleles among the horse breeds ranged from 6.74 (Hequ) to 8.81 (Debao). Although there were abundant genetic variations found, the genetic differentiation was low between the Chinese horses, which displayed only 2.4% of the total genetic variance among the different breeds. However, genetic differentiation (pairwise FST) among Chinese horses, although moderate, was still apparent and varied from 0.001 for the Guizou-Luoping pair to 0.064 for the Jingjiang-Elenchuns pair. The genetic differentiation patterns and genetic relationships among Chinese horse breeds were also consistent with their geographical distribution. The Thoroughbred and Mongolia B breeds could be discerned as two distinct breeds, but the Mongolia B horse in particular suffered genetic admixture with Chinese horses. The Chinese breeds could be divided into five major groups, i.e. the south or along the Yangtze river group (Bose, Debao, Wenshan, Lichuan, Jianchang, Guizhou, Luoping, Jinjiang and Dali), the Qinghai-Tibet Plateau group (Chaidamu, Hequ, Datong, Yushu, Tibet Grassland and Tibet Valley), the Northeast of China group (Elenchuns, Jilin and Heihe), the Northwest of China group (Kazakh, Yili and Yanqi) and the Inner Mongolia group (Mongolia A, Sanhe, Xinihe,Wuzhumuqin and Sengeng). This grouping pattern was further supported by principal component analysis and structure analysis.

journal_name

Anim Genet

journal_title

Animal genetics

authors

Ling YH,Ma YH,Guan WJ,Cheng YJ,Wang YP,Han JL,Mang L,Zhao QJ,He XH,Pu YB,Fu BL

doi

10.1111/j.1365-2052.2010.02067.x

subject

Has Abstract

pub_date

2011-02-01 00:00:00

pages

56-65

issue

eissn

0268-9146

issn

1365-2052

pii

AGE2067

journal_volume

pub_type

杂志文章

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Evaluation of the genetic diversity and population structure of Chinese indigenous horse breeds using 27 microsatellite markers.