Biodiversity Science ›› 2010, Vol. 18 ›› Issue (4): 408-413.doi: 10.3724/SP.J.1003.2010.408

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An assessment of the Central-China pig genetic diversity using Weitzman approach

Zhenzhen Liu; Xiuying Guo; Baoyu Li; Ming Wang; Xi Wang; Keliang Wu*   

  1. College of Animal Science and Technology, China Agricultural University, Beijing 100193  
  • Received:2009-11-02 Online:2010-07-20
  • Keliang Wu

The genetic diversity of livestock breeds plays an important role in livestock production, but the significant loss of breeds is threatening genetic diversity of farm animal genetic resources (AnGR). The Weitzman approach which was accepted as a framework for assessment of genetic diversity on AnGR was exploited. In this study, several measurement indexes of genetic diversity, involving total genetic diversity, contributions of each breed to the total diversity, marginal diversities, conservation potential, were calculated based on microsatellite marker data of 20 Central-China type pig populations. Total genetic diversity of twenty Central-China pig breeds was 11,707 and expected diversity was 66.96% of the total genetic diversity. Jinhua pig had the greatest contribution to overall genetic diversity (8.90%), followed by Wannan Spotted pig (7.46%), Shengxian Spotted pig (7.40%), and Leping pig (7.04%). Jinhua pig also had the highest conservation potential (783.53), followed by Shengxian Spotted pig (454.53), Hang pig (366.68), and Large Black-White pig (343.17). Shown as the derived maximum-likelihood tree, the 20 Central-China type pig breeds were clustered into three groups. The pig breeds from Hunan or Hubei Province, such as Daweizi pig, Shaziling pig and Ningxiang pig, formed a group; Nancheng pig clustered with Shengxian Spotted pig and Hang pig; The third cluster was Jinhua pig and Wannan Spotted pig. Furthermore, the advantages and drawbacks of Weitzman approach were discussed. We hope to provide objective and rational criteria and strategy for decision-making in conservation of Central-China type pig breeds.

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