Primary species recognition and phylogeny of Chondrus (Gigartinales, Rhodophyta) using 18S rDNA sequence data

HU Zimin; ZENG Xiaoqi; ALAN T. Critchley; STEVE L. Morrell; DUAN Delin

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Primary species recognition and phylogeny of Chondrus (Gigartinales, Rhodophyta) using 18S rDNA sequence data

机译：利用18S rDNA序列数据对软骨鱼类（Gigartinales，Rhodophyta）的原始物种识别和系统发育

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The nuclear-encoded small subunit ribosomal RNA gene (18S rDNA) of 16 isolates of Chondrus from 8 countries were sequenced. A total of 1796 nucleotides were obtained and aligned with the phylogenetic analysis conducted. The results suggest that the entity from Dalian, China, regarded as C. sp1 is C. pinnulatus. The C. sp2 previously depicted as C. yendoi or Mazzaella japonica may belong to genus Chondrus. So, 4 Chondrus species, i.e.C.ocellatus, C. nipponicus, C. armatus, and C. pinnulatus are distributed in China. However, the entity from Connemara,Ireland, named C. crispus, is not a Chondrus species but that of Mastocarpus stellatus, although it is morphologically similar to C. crispus. Phylogenetic analysis based on complete 18S rDNA sequence data shows that genus Chondrus includes 3 main lineages: the Northern Pacific lineage, containing C. ocellatus, C. yendoi, and C. nipponicus; C.armatus, and C. pinnulatus form the sub-North Pacific lineage; and the Northern Atlantic Ocean lineage, comprising samples of C. crispus from Canada, Portugal, Ireland, Germany and France. The phylogenetic relationships indicate that genus Chondrus might have a North Pacific ancestral origin, radiated to North Atlantic area, and then formed the species C. crispus.

机译：对来自8个国家的16个软骨鱼类分离株的核编码小亚基核糖体RNA基因（18S rDNA）进行了测序。总共获得了1796个核苷酸，并与所进行的系统发育分析比对。结果表明，来自中国大连的实体C. sp1为C. pinnulatus。以前被描绘为C. yendoi或Mazzaella japonica的C. sp2可能属于Chondrus属。因此，中国分布了4种软骨球菌，即C.ocellatus，C.nipponicus，C.armatus和C.pinnulatus。但是，来自爱尔兰康尼马拉的实体C.crispus，虽然在形态上与C.crispus相似，但它不是软骨属，而是马斯特卡斯图斯特拉种。根据完整的18S rDNA序列数据进行的系统发育分析表明，软骨物种包括3个主要谱系：北太平洋谱系，包含oc。ocellatus，C。yendoi和C. nipponicus。 C.armatus和C.pinnulatus构成了北太平洋次世系;以及北大西洋沿袭，包括来自加拿大，葡萄牙，爱尔兰，德国和法国的cris。C. crispus样本。亲缘关系表明，软骨类可能起源于北太平洋祖先，辐射到北大西洋地区，然后形成了C. crispus物种。

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来源
《中国海洋湖沼学报（英文版）》 |2007年第2期|174-183|共10页
作者
HU Zimin; ZENG Xiaoqi; ALAN T. Critchley; STEVE L. Morrell; DUAN Delin;
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作者单位

Institute of Oceanology,Chmese Academy of Sciences,Qingdao 266071,China;

Division of Life Science and Technology,Ocean University of China,Qingdao 266003,China;

Acadian Seaplants Limited,30 Brown Avenue,Dartmouth,Nova Scotia,B3B 1X8,Canada;

Dale Fort Field Centre,Dale,Pembrokeshire,SA62 3RD,UK;

Institute of Oceanology,Chmese Academy of Sciences,Qingdao 266071,China;

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收录信息中国科学引文数据库(CSCD);中国科技论文与引文数据库(CSTPCD);
原文格式 PDF
正文语种 chi
中图分类海洋学;
关键词
18S Rdna; Chondrus; red algae; phylogeny; species recognition;

机译：18S Rdna;Chondrus;红藻;系统发育;物种识别;

Primary species recognition and phylogeny of Chondrus (Gigartinales, Rhodophyta) using 18S rDNA sequence data

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