ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2007, Vol. 38 ›› Issue (12): 1300-1305.doi:

• 遗传繁育 • Previous Articles     Next Articles

Study on Mitochondrial DNA Genetic Polymorphism of Seven Indigenous Goat Breeds(Groups) in Sichuan

ZHANG Hong-ping;LI Li;XIANG De;LIU Cheng-jian;LI Xue-wei   

  1. Key Laboratory of Animal Genetics,Breeding and Reproduction,Sichuan Agricultural University,Ya’an 625014,China
  • Received:1900-01-01 Revised:1900-01-01 Online:2007-12-25 Published:2007-12-25

Abstract: Complete sequence of mitochondrial DNA(mtDNA) control region was sequenced in 43 individuals from 7 indigenous goat(Capra hircus)breeds(groups)in Sichuan province. The complete sequence of mtDNA control region was 1 212 or 1 213 base pair, and the content of A+T(59.9%)was higher than that of G+C(40.1%)significantly. 74 sites were polymorphic and all of these sequences were neutral mutation. All sequence polymorphic sites defined 27 haplotypes. High nucleotide diversity(1.868%)and haplotype diversity(0.966) were manifested. These results suggested richer genetic diversity within Sichuan indigenous goat populations and genetic divergence among them. The Kimura 2-parameter distance among breeds(groups)varied from 0.001 7 to 0.030 6. Phylogenetic unrooted trees constructed with neighbourjoining methods showed two maternal origins in Sichuan indigenous goats. More detailed studies should be continued to indicate whether the two maternal origins are Capra aegagrus and Capra falconeri.