Taxonomic and genetic status of lancelet in Weihai coastal waters based on mitochondrial DNA sequence

Qi Zhao; Qian Zhu

doi:10.1007/s00343-011-0131-6

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Taxonomic and genetic status of lancelet in Weihai coastal waters based on mitochondrial DNA sequence

OriginalPaper | Updated：2023-05-16

- Taxonomic and genetic status of lancelet in Weihai coastal waters based on mitochondrial DNA sequence
- Taxonomic and genetic status of lancelet in Weihai coastal waters based on mitochondrial DNA sequence
- 海洋湖沼学报（英文） 2011年29卷第3期页码：623-632
- Affiliations：
  
  1. Ocean College Shandong University at Weihai
  2. Third Institute of Oceanography State Oceanic Administration
- Author bio：
- Funds：
  
  Supported by the Specialized Research Fund of Third Institute of Oceanography, State Oceanic Administration, China (No. HE09701 (1) and HE09702 (1)) and the Research Fund of State Oceanic Administration, China (No. HC10301-10, HD10301-10)
- DOI：10.1007/s00343-011-0131-6
  中图分类号：
- 网络首发：2011-05-15，
  
  纸质出版：2011
- Accepted：
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Taxonomic and genetic status of lancelet in Weihai coastal waters based on mitochondrial DNA sequence[J]. 海洋湖沼学报（英文）, 2011,29(3):623-632.

Zhao, Q., Zhu, Q. Taxonomic and genetic status of lancelet in Weihai coastal waters based on mitochondrial DNA sequence., Chin. J. Ocean. Limnol. 29, 623–632 (2011). https://doi.org/10.1007/s00343-011-0131-6
Taxonomic and genetic status of lancelet in Weihai coastal waters based on mitochondrial DNA sequence[J]. 海洋湖沼学报（英文）, 2011,29(3):623-632. DOI： 10.1007/s00343-011-0131-6.

Zhao, Q., Zhu, Q. Taxonomic and genetic status of lancelet in Weihai coastal waters based on mitochondrial DNA sequence., Chin. J. Ocean. Limnol. 29, 623–632 (2011). https://doi.org/10.1007/s00343-011-0131-6 DOI：

摘要

Abstract

Lancelets (subphylum Cephalochordata) are a transitional species between invertebrates and vertebrates. They are currently listed in the Second Order of Protected Animals in China. Lancelets were first documented in the waters around the city of Weihai (Shandong

China) in 2002. However

little is known about the phylogeny of this population. We analyzed the sequences of cytochrome b (Cyt b) and cytochrome oxidase c subunit I (CO I) genes from samples collected from coastal waters in the cities of Weihai and Qingdao (∼150 km to the south). We analyzed 176 sequences

of which 150 were novel sequences and 26 were obtained from GenBank. Our results suggest that (1) lancelets in the two cities belong to the species Branchiostoma japonicus and have a high level of genetic diversity; (2) there is a high level of gene flow and low level of genetic differentiation between lancelets from the two cities; (3) demographic expansion occurred an estimated 1.1 million years (Ma) ago (mid Pleistocene) for lancelets in Weihai-Qingdao; and (4) the divergence between B. belcheri and B. japonicus was estimated at between 37.75 Ma (early Oligocene)-46.5 Ma (late Eocene).

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references

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