ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2015, Vol. 46 ›› Issue (12): 2264-2272.doi: 10.11843/j.issn.0366-6964.2015.12.019

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Population Genetic Polymorphisms of Heterakis gallinarum in Sichuan Base on Mitochondrial 12S Gene

WANG Bao-jian,ZHU Jun-yang,JIAN Ke-ling,YANG Guang-you,WANG Tao,LAI Wei-min,ZHAO Xi-bin,LIAO Xiao-xia,GU Xiao-bin*   

  1. (College of Veterinary Medicine,Sichuan Agricultural University,Chengdu 611133,China)
  • Received:2015-04-07 Online:2015-12-23 Published:2015-12-23

Abstract:

To study the population genetic diversity and genetic structure of Heterakis gallinarum population in Sichuan,the complete sequence of mitochondrial 12S gene of 58 H.gallinarum isolates from 7 different geographical regions in Sichuan were amplified and analyzed the genetic diversity.The results showed that the complete lengths of mitochondrial 12S gene sequenced from 58 H.gallinarum isolates in this study were all 699 bp.These sequences contained 38 variable sites and were classified into 34 haplotypes(HS1-HS34).The values of haplotypes diversity(Hd) and nucleotide diversity(π) were 0.822 and 0.003 95,respectively.Genetic diversity with Fst and Nm furtherly showed that there were no significant genetic differentiation and frequent gene flow among the seven populations(Fst=0.007 87,Nm=31.52).An analysis of molecular variance(AMOVA) estimated that 99.21% of the genetic variation was partitioned within the population,and only 0.79% occurred among populations.NJ phylogenetic tree and haplotype network were both revealed that 34 haplotypes from 7 different geographical regions dispersed different geographical populations,and haplotypes did not cluster according to their geographical location.The results indicated that the H.gallinarum population in Sichuan had a low level of genetic diversity and no significant genetic differentiation,it have not formed significant geographical genetic structure.

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