Insight into the Population Genetics of the Walleye Pollock Gadus chalcogrammus (Pallas, 1814) in the Northwestern Pacific from Microsatellite Multiplex Assay Study

Diversity Pub Date : 2024-09-06 DOI:10.3390/d16090556
Chung Il Lee, Moongeun Yoon, Keun-Yong Kim, Biet Thanh Tran, Chang-Keun Kang, Yun-Hwan Jung, Hae Kun Jung, Insong Koh, Jiyoung Woo
{"title":"Insight into the Population Genetics of the Walleye Pollock Gadus chalcogrammus (Pallas, 1814) in the Northwestern Pacific from Microsatellite Multiplex Assay Study","authors":"Chung Il Lee, Moongeun Yoon, Keun-Yong Kim, Biet Thanh Tran, Chang-Keun Kang, Yun-Hwan Jung, Hae Kun Jung, Insong Koh, Jiyoung Woo","doi":"10.3390/d16090556","DOIUrl":null,"url":null,"abstract":"The walleye pollock, Gadus chalcogrammus (Pallas, 1814), is one of the most commercially and ecologically valuable species in the Northwestern Pacific. However, combined pressures of overfishing and environmental changes have led to a substantial decline in its production in Japan and Russia since the 1990s, and a collapse in Korea since the 2000s. The objective of this study was to comprehensively examine its genetic diversity and population structure with an extensive sampling effort of 16 populations across the Northwestern Pacific including South Korea, Japan, and Russia. A multiplex PCR assay composed of seven microsatellite markers revealed a moderate level of observed heterozygosity (Ho = 0.369–0.599), which is lower than that reported in previous studies of this species. All loci were highly polymorphic, with the mean PIC ranging from 0.608 to 0.793. The structure of the 16 populations was characterized by heterozygote deficiency, a modest effective allele number (Ne = 4.551–7.969), low genetic differentiation (FST = 0.000–0.054), a weak population structure, a genetic admixture, and no significant correlation between the genetic and geographic distance. These characteristics are typical of pelagic marine species with large population sizes due to a consistent gene flow among populations when there are no physical boundaries in the open ocean. The seasonal and country-specific genetic structure indicated that G. chalcogrammus populations in the Northwestern Pacific region should be managed as a single management unit. The findings from this study provide critical information for future genetic monitoring, conservation management, and the development of strategies aimed at restoring the populations of this species.","PeriodicalId":501149,"journal":{"name":"Diversity","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Diversity","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.3390/d16090556","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0

Abstract

The walleye pollock, Gadus chalcogrammus (Pallas, 1814), is one of the most commercially and ecologically valuable species in the Northwestern Pacific. However, combined pressures of overfishing and environmental changes have led to a substantial decline in its production in Japan and Russia since the 1990s, and a collapse in Korea since the 2000s. The objective of this study was to comprehensively examine its genetic diversity and population structure with an extensive sampling effort of 16 populations across the Northwestern Pacific including South Korea, Japan, and Russia. A multiplex PCR assay composed of seven microsatellite markers revealed a moderate level of observed heterozygosity (Ho = 0.369–0.599), which is lower than that reported in previous studies of this species. All loci were highly polymorphic, with the mean PIC ranging from 0.608 to 0.793. The structure of the 16 populations was characterized by heterozygote deficiency, a modest effective allele number (Ne = 4.551–7.969), low genetic differentiation (FST = 0.000–0.054), a weak population structure, a genetic admixture, and no significant correlation between the genetic and geographic distance. These characteristics are typical of pelagic marine species with large population sizes due to a consistent gene flow among populations when there are no physical boundaries in the open ocean. The seasonal and country-specific genetic structure indicated that G. chalcogrammus populations in the Northwestern Pacific region should be managed as a single management unit. The findings from this study provide critical information for future genetic monitoring, conservation management, and the development of strategies aimed at restoring the populations of this species.
从微卫星多重分析研究中洞察西北太平洋黑线鳕(Gadus chalcogrammus,Pallas,1814 年)的种群遗传学
马眼狭鳕(Gadus chalcogrammus,Pallas,1814 年)是西北太平洋最具商业和生态价值的物种之一。然而,在过度捕捞和环境变化的双重压力下,自 20 世纪 90 年代以来,日本和俄罗斯的鳕鱼产量大幅下降,而韩国的鳕鱼产量自 2000 年代以来也出现了崩溃。本研究旨在通过对西北太平洋地区(包括韩国、日本和俄罗斯)的 16 个种群进行广泛采样,全面考察其遗传多样性和种群结构。由 7 个微卫星标记组成的多重 PCR 分析显示,观察到的杂合度(Ho = 0.369-0.599)处于中等水平,低于以往对该物种的研究报告。所有位点都具有高度多态性,平均 PIC 值在 0.608 至 0.793 之间。16 个种群的结构特点是杂合子缺乏、有效等位基因数不高(Ne = 4.551-7.969)、遗传分化低(FST = 0.000-0.054)、种群结构弱、遗传混杂、遗传距离与地理距离之间无显著相关性。这些特征是种群规模较大的中上层海洋物种的典型特征,因为在大洋中没有物理边界时,种群间的基因流动是一致的。季节性和特定国家的遗传结构表明,西北太平洋地区的 G. chalcogrammus 种群应作为单一管理单元进行管理。这项研究的结果为未来的遗传监测、保护管理和制定旨在恢复该物种种群的战略提供了重要信息。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
自引率
0.00%
发文量
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信