Genetic variation and genetic structure analysis of Todarodes pacificus based on mitochondrial DNA markers

doi:10.12024/jsou.20200703103

Home > Archive>Volume 30, Issue 4, 2021 >763-769. DOI:10.12024/jsou.20200703103

Genetic variation and genetic structure analysis of Todarodes pacificus based on mitochondrial DNA markers
DOI:
                        10.12024/jsou.20200703103
                    
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                        ZHANG QinZHANG Qin
College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China
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CAO YangmingCAO Yangming
College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China
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LU HuajieLU Huajie
College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China;Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources, Ministry of Education, Shanghai 201306, China;National Distant-water Fisheries Engineering Research Center, Shanghai 201306, China;Key Laboratory of Ocean Fisheries Exploitation, Ministry of Agriculture and Rural Affairs, Shanghai 201306, China;Scientific Observing and Experimental Station of Oceanic Fishery Resources, Ministry of Agriculture and Rural Affairs, Shanghai 201306, China
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LIU YangLIU Yang
College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China;Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources, Ministry of Education, Shanghai 201306, China;National Distant-water Fisheries Engineering Research Center, Shanghai 201306, China;Key Laboratory of Ocean Fisheries Exploitation, Ministry of Agriculture and Rural Affairs, Shanghai 201306, China;Scientific Observing and Experimental Station of Oceanic Fishery Resources, Ministry of Agriculture and Rural Affairs, Shanghai 201306, China
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ZHANG ZhongZHANG Zhong
College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China;Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources, Ministry of Education, Shanghai 201306, China;National Distant-water Fisheries Engineering Research Center, Shanghai 201306, China;Key Laboratory of Ocean Fisheries Exploitation, Ministry of Agriculture and Rural Affairs, Shanghai 201306, China;Scientific Observing and Experimental Station of Oceanic Fishery Resources, Ministry of Agriculture and Rural Affairs, Shanghai 201306, China
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FANG ZhouFANG Zhou
College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China;Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources, Ministry of Education, Shanghai 201306, China;National Distant-water Fisheries Engineering Research Center, Shanghai 201306, China;Key Laboratory of Ocean Fisheries Exploitation, Ministry of Agriculture and Rural Affairs, Shanghai 201306, China;Scientific Observing and Experimental Station of Oceanic Fishery Resources, Ministry of Agriculture and Rural Affairs, Shanghai 201306, China
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WANG CongcongWANG Congcong
College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China;Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources, Ministry of Education, Shanghai 201306, China;National Distant-water Fisheries Engineering Research Center, Shanghai 201306, China;Key Laboratory of Ocean Fisheries Exploitation, Ministry of Agriculture and Rural Affairs, Shanghai 201306, China;Scientific Observing and Experimental Station of Oceanic Fishery Resources, Ministry of Agriculture and Rural Affairs, Shanghai 201306, China
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Affiliation:
Clc Number:S931.5
Fund Project:2019YFD0901404、31702312、A1-2006-00-301106, A1-0203-00-2009-6

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Abstract:

Todarodes pacificus(T. pacificus) is an important fishery species around the world. In order to scientifically manage and exploit this fishery resources, mitochondrial COⅠgene and Cytb gene sequences were assessed to explore the level of genetic structure and variation of T. pacificus from the northwestern Pacific Ocean.465 bp(COⅠ) and 404 bp(Cytb) gene sequences were obtained and a total of 18 and 21 haplotypes were defined, which had been derived from 90 individuals in three sites. The results showed that the haplotype diversity of COⅠ gene and Cytb gene sequences were 0.493 and 0.479, respectively.The nucleotide diversity of COⅠgene and Cytb gene sequences were 0.001 3 and 0.001 4, respectively. It was also found that genetic differentiation coefficient (F_st) were negtive(F_st<0.05), the tremendous gene flow (Nm) values were approximate infinity. However, molecular biological variance analysis (AMOVA) showed that the genetic variation observed within populations were 100.82% and 99.57%, respectively.There sults of Tajima's D based on COⅠand Cytb gene sequences of T. pacificus were -2.341 2 and -22.643 0 (P<0.01), respectively. In summary, all these results revealed that the genetic diversity of T. pacificus population in the northwest Pacific Ocean was extremely low, and there was no genetic differentiation among the three geographic groups. Besides, the genetic variation mainly came from individuals within the species. And the population expansion occurred about between 12 000 and 15 000 years ago.Therefore, it is suggested that T. pacificus should be regarded as an integration management unit in fishery management.

Key words:Todarodes pacificus;genetic variation;COⅠ;Cytb

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张琴,曹洋铭,陆化杰,刘洋,张忠,方舟,王丛丛.基于线粒体基因标记的太平洋褶柔鱼群体遗传结构及变异分析[J].上海海洋大学学报,2021,30(4):763-769.
ZHANG Qin, CAO Yangming, LU Huajie, LIU Yang, ZHANG Zhong, FANG Zhou, WANG Congcong. Genetic variation and genetic structure analysis of Todarodes pacificus based on mitochondrial DNA markers[J]. Journal of Shanghai Ocean University,2021,30(4):763-769.

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Received:July 08,2020
Revised:September 15,2020
Adopted:September 21,2020
Online: August 05,2021
Published: July 15,2021

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