Genetic Diversity and Population Structure of Cultured and Wild Barramundi Lates calcarifer (Latidae) in Taiwan

IF 0.5 4区 生物学 Q4 FISHERIES Journal of Ichthyology Pub Date : 2024-08-12 DOI:10.1134/s0032945224700450
T. Y. Chen, A. Nazir, H. C. Lim, J. C. Shiao
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Abstract

Barramundi, or Asian seabass Lates calcarifer, is a commercially important food fish with a wide geographic distribution in the Indo-West Pacific region. Despite its economic significance, particularly in Taiwan, information on the sources of fertilized eggs, fry and stock management practices remains largely unavailable. To ensure sustainable exploitation and effective selective breeding programs, assessing the genetic diversity and population genetic structure of barramundi is crucial. This study investigated the genetic diversity and population genetic structure of three cultured populations (Chiayi A, Chiayi B, and Tainan) and one wild-caught population in Taiwan using mitochondrial DNA cytochrome b and eight microsatellite loci as genetic markers. The analysis of haplotype network revealed that all populations shared an ancestral haplotype, yet each population had its own unique haplotype. Notably, the wild and cultured populations showed the largest genetic distance. However, overall, the genetic distances among all populations were small and similar. This finding suggests potential gene exchange, possibly through broodstock exchange practices between farms. The valuable genetic information obtained from this study holds the potential to improve aquaculture programs through targeted breeding initiatives and inform the development of sustainable management policies for barramundi.

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台湾养殖和野生肺鱼的遗传多样性和种群结构
摘要金目鲈,或称亚洲鲈鱼,是一种重要的商业食用鱼,广泛分布于印度-西太平洋地区。尽管它具有重要的经济意义,特别是在台湾,但有关受精卵、鱼苗来源和种群管理方法的信息仍基本缺失。为确保可持续开发和有效的选育计划,评估肺鱼的遗传多样性和种群遗传结构至关重要。本研究以线粒体 DNA 细胞色素 b 和八个微卫星位点为遗传标记,研究了台湾三个养殖种群(嘉义 A、嘉义 B 和台南)和一个野生捕捞种群的遗传多样性和种群遗传结构。单倍型网络分析显示,所有种群共享一个祖先单倍型,但每个种群都有自己独特的单倍型。值得注意的是,野生种群和养殖种群的遗传距离最大。不过,总体而言,所有种群之间的遗传距离都很小,而且很相似。这一发现表明,可能通过养殖场之间的雏种交换,存在潜在的基因交换。本研究获得的宝贵遗传信息有望通过有针对性的育种措施改善水产养殖计划,并为制定肺鱼可持续管理政策提供信息。
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来源期刊
CiteScore
1.00
自引率
28.60%
发文量
96
期刊介绍: Journal of Ichthyology is an international peer-reviewed journal published in collaboration with the Russian Academy of Sciences. It covers original studies in fish taxonomy, evolution, molecular biology, morphology, species diversity, zoological geography, genetics, physiology, ecology, behavior, reproduction, embryology, invasions, and protection. Some problems of applied ichthyology are also covered. The journal welcomes manuscripts from all countries in the English or Russian language.
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