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KMID : 0425120130510040449
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Parasites, Hosts and Diseases
2013 Volume.51 No. 4 p.449 ~ p.452
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Genetic Variation of Taenia Pisiformis Collected from Sichuan, China, Based on the Mitochondrial Cytochrome b gene
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Yang Deying
Ren Yongjun
Fu Yan
Xie Yue
Nie Huaming
Nong Xiang
Gu Xiaobin
Wang Shuxian
Peng Xuerong
Yang Guangyou
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Abstract
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Taenia pisiformis is one of the most important parasites of canines and rabbits. T. pisiformis cysticercus (the larval stage) causes severe damage to rabbit breeding, which results in huge economic losses. In this study, the genetic variation of T. pisiformis was determined in Sichuan Province, China. Fragments of the mitochondrial cytochrome b (cytb) (922 bp) gene were amplified in 53 isolates from 8 regions of T. pisiformis. Overall, 12 haplotypes were found in these 53 cytb sequences. Molecular genetic variations showed 98.4% genetic variation derived from intra-region. FST and Nm values suggested that 53 isolates were not genetically differentiated and had low levels of genetic diversity. Neutrality indices of the cytb sequences showed the evolution of T. pisiformis followed a neutral mode. Phylogenetic analysis revealed no correlation between phylogeny and geographic distribution. These findings indicate that 53 isolates of T. pisiformis keep a low genetic variation, which provide useful knowledge for monitoring changes in parasite populations for future control strategies.
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KEYWORD
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Taenia pisiformis, cytochrome b, genetic variation, China
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