The second transcribed spacer rDNA sequence: an effective genetic marker for inter similar to species phylogenetic analysis of trematodes in the order Strigeata

文献类型: 外文期刊

第一作者: Li, J.

作者: Li, J.;Mo, X. H.;Li, X. Y.;Song, H. Q.;Zhu, X. Q.;Zhao, G. H.;Li, X. Y.;Li, J.;Li, J.;Lin, R. Q.;Weng, Y. B.;Song, H. Q.;Zou, F. C.;Zhu, X. Q.

作者机构:

期刊名称:PARASITOLOGY RESEARCH ( 影响因子:2.289; 五年影响因子:2.403 )

ISSN: 0932-0113

年卷期: 2012 年 111 卷 4 期

页码:

收录情况: SCI

摘要: In the present study, the second nuclear internal transcribed spacer (ITS-2) rDNA of Schistosoma japonicum isolates in mainland China was amplified, sequenced, and assessed for inferring the intra-and inter-species phylogenetic relationships of trematodes in the order Strigeata. The fragment containing ITS-2 rDNA was obtained from 24 S. japonicum isolates from eight epidemic provinces in mainland China. The length polymorphisms were observed among these ITS-2 rDNA sequences, ranging from 343 to 346 bp, and the intra-and inter-population variations in ITS-2 sequence were 0.0-2.1% among S. japonicum isolates in China. Phylogenetic analyses using the maximum parsimony and maximum likelihood methods revealed that the ITS2 rDNA sequence is not a suitable marker for studying inter- and intra-population variation in S. japonicum. However, phylogenetic analysis of trematodes in the order Strigeata indicated that the ITS-2 rDNA sequence provides an effective molecular marker for studying inter-species phylogenetic relationships among trematodes in this order.

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