Phylogenetic analysis of Pectinidae (Bivalvia) based on the ribosomal DNA internal transcribed spacer region

被引:0
作者
Huang Xiaoting [1 ]
Bi Ke [1 ]
Hu Jingjie [1 ]
Hu Xiaoli [1 ]
Bao Zhenmin [1 ]
机构
[1] Ocean Univ China, Coll Marine Life Sci, Lab Mol Genet & Breeding Mollusk, Qingdao 266003, Peoples R China
关键词
bivalve; Pectinidae; ribosomal DNA; ITS; phylogeny;
D O I
暂无
中图分类号
P7 [海洋学];
学科分类号
0707 ;
摘要
The ribosomal DNA internal transcribed spacer (ITS) region is a useful genomic region for understanding evolutionary and genetic relationships. In the current study, the molecular phylogenetic analysis of Pectinidae (Mollusca: Bivalvia) was performed using the nucleotide sequences of the nuclear ITS region in nine species of this family. The sequences were obtained from the scallop species Argopecten irradians, Mizuhopecten yessoensis, Amusium pleuronectes and Mimachlamys nobilis, and compared with the published sequences of Aequipecten opercularis, Chlamys farreri, C. distorta, M. varia, Pecten maximus, and an outgroup species Perna viridis. The molecular phylogenetic tree was constructed by the neighbor-joining and maximum parsimony methods. Phylogenetic analysis based on ITS1, ITS2, or their combination always yielded trees of similar topology. The results support the morphological classifications of bivalve and are nearly consistent with classification of two subfamilies (Chlamydinae and Pectininae) formulated by Waller. However, A. irradians, together with A. opercularis made up of genera Amusium, evidences that they may belong to the subfamily Pectinidae. The data are incompatible with the conclusion of Waller who placed them in Chlamydinae by morphological characteristics. These results provide new insights into the evolutionary relationships among scallop species and contribute to the improvement of existing classification systems.
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页码:83 / 90
页数:8
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