当前位置: 首页 > 文章 > 浙江沿海潮间带多毛类环节动物DNA条形码数据库初建 浙江海洋学院学报(自然科学版) 2017 (2) 95-102
Position: Home > Articles > Development of DNA Barcode Reference Library for Polychaetous Annelids Identified from the Coastal Intertidal Zone of Zhejiang Coastal Sea Journal of Zhejiang Ocean University(Natural Science) 2017 (2) 95-102

浙江沿海潮间带多毛类环节动物DNA条形码数据库初建

作  者:
姚瑞;谢斐昂;严安琪;陈永久
单  位:
浙江海洋大学海洋科学与技术学院;浙江海洋大学国家海洋设施养殖工程技术研究中心
关键词:
DNA条形码;线粒体COⅠ序列;形态学;多毛类;浙江沿海
摘  要:
多毛纲环节动物是形态学分类鉴定极为困难的一类海洋生物。本研究旨在构建浙江沿海常见多毛类的DNA条形码数据库。2015年1-10月期间,针对多毛类环节动物在浙江沿海潮间带进行了多次定性采样,并对样本进行了形态学鉴定以及线粒体COⅠDNA序列分析。从形态学上共鉴定了8个多毛类物种,隶属于4个科,即双齿围沙蚕Perinereis aibuhitensis、威氏围沙蚕P.wilsoni、独齿围沙蚕P.cultrifera、杂色伪沙蚕Pseudonereis variegata、双管阔沙蚕Platynereis bicanaliculata、短毛海鳞虫Halosydna brevisetosa、岩虫Marphysa sanguinea、四索沙蚕Lumbrineris tetraura。共得到长度为680~930 bp的13条DNA序列,其中2条属于P.wilsoni、2条属于M.sanguinea的片段,这两个物种的序列还未在BOLD中收录;1条H.brevisetosa的COⅠ基因序列与Gen Bank上的同名序列差异较大。计算得到样本的种内平均遗传距离为2.8%,科内种间平均遗传距离为23.9%,科内种间距离远远大于种内距离;从而印证了COⅠ可作为多毛类动物分类的条形码。此外,本研究还设计了一对多毛类动物COⅠ片段的特异性引物,而且适用于扩增A+T含量较高的多毛类物种。
译  名:
Development of DNA Barcode Reference Library for Polychaetous Annelids Identified from the Coastal Intertidal Zone of Zhejiang Coastal Sea
作  者:
YAO Rui;XIE Fei-ang;YAN An-qi;National Engineering Research Center for Mariculture,Zhejiang Ocean University;Marine Science and Technology School of Zhejiang Ocean University;
关键词:
DNA barcoding;;mitochondrial COⅠsequence;;morphology;;polychaete;;Zhejiang coastal sea
摘  要:
It remains a big challenge for accurate identification of marine polychaetous annelids solely de-pending on morphology.This study aimed to develop a DNA barcode reference library for polychaetes collected from intertidal zones of Zhejiang coastal sea during the period from January to October,2015.Samples were se-lected for mitochondrial COⅠDNA sequence analysis after morphological examination.Eight species from fourfamilies,i.e.Perinereis aibuhitensis,P.wilsoni,P.cultrifera,Pseudonereis variegata,Platynereis bicanaliculata,Halosydna brevisetosa,Marphysa sanguinea and Lumbrineris tetraura were identified from 13 CO Ⅰ DNA sequences at the length of 680-930 bp; two sequences of P.wilsoni and two sequences of M.sanguinea are unavailable in BOLD's collection; one sequence shares 88% similarity with a sequence of H.brevisetos on GenBank; The average K-2-P distance within species is 2.8% and between species within family is 23.9%.The significant gap in K-2-P distance between-species and within-species suggests that COⅠsequence is suitable for DNA barcoding in Polychaeta.In addition,we designed a pair of primers for amplifying CO Ⅰ DNA fragment of polychaete species,especially of species that have high A+T composition in the gene.

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