| Primary species recognitionand phylogeny of Chondrus （Gigartinales, Rhodophyta） using 18S rDNA sequence data |
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| 引用本文： | 胡自民,曾晓起,段德麟.Primary species recognitionand phylogeny of Chondrus （Gigartinales, Rhodophyta） using 18S rDNA sequence data[J].中国海洋与湖沼学报,2007,25(2):174-183. |
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| 作者姓名： | 胡自民 曾晓起 段德麟 |
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| 作者单位： | Institute of Oceanology Chinese Academy of Sciences，Division of Life Science and Technology Ocean University of 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 Chinese Academy of Sciences，Qingdao 266071 China，Qingdao 266003 China，Qingdao 266071 China |
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| 基金项目： | 中国科学院知识创新工程项目 |
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| 摘 要： | 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.
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| 关 键 词： | 角叉菜属 红藻 生物种 鉴别 系统演化 |
| 收稿时间： | 2006-07-24 |
| 修稿时间： | 2006-11-13 |
Primary species recognition and phylogeny of <Emphasis Type="Italic">Chondrus</Emphasis> (Gigartinales,Rhodophyta) using 18S rDNA sequence data |
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| Hu?Zimin,Zena?Xiaoqi,Alan?T.?Critchley,Steve?L.?Morrell,Duan?Delin.Primary species recognition and phylogeny of Chondrus (Gigartinales,Rhodophyta) using 18S rDNA sequence data[J].Chinese Journal of Oceanology and Limnology,2007,25(2):174-183. |
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| Authors: | Hu Zimin Zena Xiaoqi Alan T Critchley Steve L Morrell Duan Delin |
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| Institution: | (1) Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China;(2) Division of Life Science and Technology, Ocean University of China, Qingdao, 266003, China;(3) Acadian Seaplants Limited, 30 Brown Avenue, Dartmouth, Nova Scotia, B3B 1X8, Canada;(4) Dale Fort Field Centre, Dale, Pembrokeshire, SA62 3RD, UK |
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| Abstract: | 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. |
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| Keywords: | 18S Rdna Chondrus red algae phylogeny species recognition |
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