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Asian-Australas J Anim Sci > Accepted Articles
DOI: https://doi.org/10.5713/ajas.18.0737    [Accepted] Published online February 9, 2019.
Insights into the genetic diversity of indigenous goats and their conservation priorities
Gang Liu1  , Qianjun Zhao2, Feizhou Sun1, Xu Han Han1, Junjin Zhao1, Haiyong Feng1, Kejun Wang1,*, Jian Lu1,*, Chousheng Liu1,*
1National Center for Preservation and Utilization of Animal Genetic Resources, National Animal Husbandry Service, Beijing 100193, China
2Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China
3College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengzhou 450002, China
Correspondence:  Kejun Wang, Tel: +86 15652187641, Fax: 86-0317-55369208, Email: wangkj@cau.edu.cn
Jian Lu, Tel: +86 15652187641, Fax: 86-0317-55369208, Email: wangkj@cau.edu.cn
Chousheng Liu, Tel: +86 15652187641, Fax: 86-0317-55369208, Email: wangkj@cau.edu.cn
Received: 30 September 2018   • Revised: 27 November 2018   • Accepted: 30 September 2018
Abstract
Objective
An experiment was conducted to evaluate genetic diversity of 26 Chinese indigenous goats by 30 microsatellite markers, and then to define conservation priorities to set up the protection programs according to the weight given to within- and between-breed genetic diversity.
Methods
Twenty-six representative populations of Chinese indigenous goats, 1351 total, were sampled from different geographic regions of China. Within-breed genetic diversity and marker polymorphism were estimated calculating the mean number of alleles (MNA), observed heterozygosities (HO), expected heterozygosities (He), fixation index (FIS), effective number of alleles (NE) and allelic richness (Rt). Conservation priorities were analyzed by statistical methods.
Results
A relatively high level of genetic diversity was found in twenty-four populations, the exceptions were in the Daiyun and Fuqing goat populations. Within-breed kinship coefficients matrix identified seven highly inbred breeds which should be concerned. Of these, six breeds will get a negative contribution to heterozygosity when the method was based on proportional contribution to heterozygosity. Based on Weitzman or Piyasatian and Kinghorn methods, the breeds distant from others i.e. Inner Mongolia Cashmere goat, Chengdu Brown goat and Leizhou goat will obtain a high ranking. Evidence from Caballero and Toro and Fabuel et al. method prioritized Jining Gray goat, Liaoning Cashmere goat and Inner Mongolia Cashmere goat, that in agreement with results from Kinship-based methods.
Conclusion
Conservation priorities had planned according to multiple methods. Our results suggest Inner Mongolia Cashmere goat (most methods), Jining Gray goat and Liaoning Cashmere goat (high contribution to heterozygosity and total diversity) should be prioritized based on most methods. Furthermore, Daiyun goat and Shannan White goat also should be prioritized based on consideration of effective population size. However, if one breed could survive in changing conditions all the time, the straightforward approach is to increase its utilization and attraction for production via mining breed germplasm characteristic.
Keywords: Chinese Indigenous Goats; Genetic Diversity; Conservation Priorities


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