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Abstract <p>In recent years, tilapia have become increasingly important in aquaculture in South China. Due to its strong ecological adaptability, the redbelly tilapia (<i>Coptodon zillii</i>) has rapidly established natural populations in many waters of South China, posing a potential threat to the ecosystem structure and function of aquatic realms. However, the genetic information of wild populations of this species have not been well-characterized. In this study, mitochondrial control region sequences were used to analyze population genetic features of wild populations of the redbelly tilapia from Fuzhou, China. A total of 82 redbelly tilapia samples were collected from eight sits in Fuzhou. We also downloaded additional 38 control region sequences of the redbelly tilapia from the GenBank database. Population genetics analyses revealed that only two haplotypes and extremely low levels of genetic diversity were detected in Fuzhou populations, indicating a founder event of this species. Moreover, based on shared haplotype information and phylogenetic topology, our results suggested that the wild redbelly tilapia populations in Fuzhou should be established by at least two introduction events. Our study provides a genetic background for the Fujian populations of the redbelly tilapia. These genetic data and information in this study are essential for further invasion biology studies in the redbelly tilapia, and can provide fundamental materials for invasion management and scientific control of this species.</p>

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Extremely Low Genetic Diversity and Multiple Introduction Events of the Wild Redbelly Tilapia (Coptodon zillii) Populations from Fuzhou, China

  • 期刊论文

  • 发表日期：

    2025年9月19日

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  • Jianjie Lin,
  • Xiaobin Jiang,
  • Rui Wang,
  • Xing Miao,
  • Ran Zhang,
  • Hai Li,
  • Puqing Song,
  • Shengyong Xu

摘要

Abstract

In recent years, tilapia have become increasingly important in aquaculture in South China. Due to its strong ecological adaptability, the redbelly tilapia (Coptodon zillii) has rapidly established natural populations in many waters of South China, posing a potential threat to the ecosystem structure and function of aquatic realms. However, the genetic information of wild populations of this species have not been well-characterized. In this study, mitochondrial control region sequences were used to analyze population genetic features of wild populations of the redbelly tilapia from Fuzhou, China. A total of 82 redbelly tilapia samples were collected from eight sits in Fuzhou. We also downloaded additional 38 control region sequences of the redbelly tilapia from the GenBank database. Population genetics analyses revealed that only two haplotypes and extremely low levels of genetic diversity were detected in Fuzhou populations, indicating a founder event of this species. Moreover, based on shared haplotype information and phylogenetic topology, our results suggested that the wild redbelly tilapia populations in Fuzhou should be established by at least two introduction events. Our study provides a genetic background for the Fujian populations of the redbelly tilapia. These genetic data and information in this study are essential for further invasion biology studies in the redbelly tilapia, and can provide fundamental materials for invasion management and scientific control of this species.