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Biodiversity of pig breeds from China and Europe estimated from pooled DNA samples: differences in microsatellite variation between two areas of domestication

  • Hendrik-Jan Megens1Email author,
  • Richard PMA Crooijmans1,
  • Magali San Cristobal2,
  • Xiao Hui3,
  • Ning Li3 and
  • Martien AM Groenen1
Genetics Selection Evolution200840:103

https://doi.org/10.1186/1297-9686-40-1-103

Received: 24 July 2006

Accepted: 18 July 2007

Published: 15 January 2008

Abstract

Microsatellite diversity in European and Chinese pigs was assessed using a pooled sampling method on 52 European and 46 Chinese pig populations. A Neighbor Joining analysis on genetic distances revealed that European breeds were grouped together and showed little evidence for geographic structure, although a southern European and English group could tentatively be assigned. Populations from international breeds formed breed specific clusters. The Chinese breeds formed a second major group, with the Sino-European synthetic Tia Meslan in-between the two large clusters. Within Chinese breeds, in contrast to the European pigs, a large degree of geographic structure was noted, in line with previous classification schemes for Chinese pigs that were based on morphology and geography. The Northern Chinese breeds were most similar to the European breeds. Although some overlap exists, Chinese breeds showed a higher average degree of heterozygosity and genetic distance compared to European ones. Between breed diversity was even more pronounced and was the highest in the Central Chinese pigs, reflecting the geographically central position in China. Comparing correlations between genetic distance and heterozygosity revealed that China and Europe represent different domestication or breed formation processes. A likely cause is a more diverse wild boar population in Asia, but various other possible contributing factors are discussed.

Keywords

pigsChinese breedsEuropean breedsDNA poolsmicrosatellitediversity

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Authors’ Affiliations

(1)
Wageningen University, Animal Breeding and Genomics Centre, Wageningen, The Netherlands
(2)
INRA, UMR444 Laboratoire de génétique cellulaire, Castanet Tolosan, France
(3)
China Agricultural University, National Laboratories for Agrobiotechnology, Beijing, PR China

Copyright

© INRA, EDP Sciences 2008

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