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

Genetics Selection Evolution

Martien AM Groenen²  Ning Li¹  Xiao Hui¹  Magali San Cristobal³  Richard PMA Crooijmans²  Hendrik-Jan Megens² 

[1] China Agricultural University, National Laboratories for Agrobiotechnology, Yuanmingyuan West Road 2, Haidian District, 100094 Beijing, PR China;Wageningen University, Animal Breeding and Genomics Centre, PO Box 338, 6700AH, Wageningen, The Netherlands;INRA, UMR444 Laboratoire de génétique cellulaire, 31326 Castanet Tolosan, France

关键词: diversity;    microsatellite;    DNA pools;    European breeds;    Chinese breeds;    pigs;   

Others  :  1093904
DOI  :  10.1186/1297-9686-40-1-103

 received in 2006-07-24, accepted in 2007-07-18,  发布年份 2008

【 摘 要 】

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.

【 授权许可】

   
2008 INRA, EDP Sciences