Asian-Australasian Journal of Animal Sciences

Asian Australasian Association of Animal Production Societies (아세아태평양축산학회)
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Insights into the genetic diversity of indigenous goats and their conservation priorities

  • Liu, Gang (National Center for Preservation and Utilization of Animal Genetic Resources, National Animal Husbandry Service) ;
  • Zhao, Qianjun (Institute of Animal Sciences, Chinese Academy of Agricultural Sciences) ;
  • Lu, Jian (National Center for Preservation and Utilization of Animal Genetic Resources, National Animal Husbandry Service) ;
  • Sun, Feizhou (National Center for Preservation and Utilization of Animal Genetic Resources, National Animal Husbandry Service) ;
  • Han, Xu (National Center for Preservation and Utilization of Animal Genetic Resources, National Animal Husbandry Service) ;
  • Zhao, Junjin (National Center for Preservation and Utilization of Animal Genetic Resources, National Animal Husbandry Service) ;
  • Feng, Haiyong (National Center for Preservation and Utilization of Animal Genetic Resources, National Animal Husbandry Service) ;
  • Wang, Kejun (College of Animal Science and Veterinary Medicine, Henan Agricultural University) ;
  • Liu, Chousheng (National Center for Preservation and Utilization of Animal Genetic Resources, National Animal Husbandry Service)
  • Received : 2018.09.30
  • Accepted : 2019.01.11
  • Published : 2019.10.01
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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, 1,351 total, were sampled from different geographic regions of China. Within-breed genetic diversity and marker polymorphism were estimated calculating the mean number of alleles, observed heterozygosities, expected heterozygosities, fixation index, effective number of alleles and allelic richness. Conservation priorities were analyzed by statistical methods. Results: A relatively high level of genetic diversity was found in twenty-four population; the exceptions were in the Daiyun and Fuqing goat populations. Within-breed kinship coefficient matrices identified seven highly inbred breeds which should be of concern. Of these, six breeds receive 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 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, which agree with results from Kinship-based methods. Conclusion: Conservation priorities were determined 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 can continually survive under changing conditions, the straightforward approach would be to increase its utilization and attraction for production via mining breed germplasm characteristics.

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