Assessment of Genetic Diversity of the Salangid, Neosalanx taihuensis, Based on the Mitochondrial COI Gene in Different Chinese River Basins

文献类型： 外文期刊

第一作者： Fang, Di-An

作者： Fang, Di-An;Ren, Ya-Fei;Zhou, Yan-Feng;Jiang, Shu-Lun;You, Yang;Fang, Di-An;He, Miao;Luo, Hui

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关键词： aquatic ecology; diversity assessment; Neosalanx taihuensis; germplasm resources; population genetic structure

期刊名称：BIOLOGY-BASEL （ 影响因子：5.168； ）

ISSN：

年卷期： 2022 年 11 卷 7 期

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收录情况： SCI

摘要： Simple Summary In the current study, we estimate the genetic diversity of the salangid Neosalanx taihuensis sampled from 11 populations in the six typical river basins of China. Using the COI gene sequencing technology, the N. taihuensis population's genetic difference within and between river basins was investigated. Significant levels of genetic subdivision were detected among populations within basins rather than between basins. Population history dynamics showed that N. taihuensis populations experienced a population expansion during the glacial period in the late Pleistocene. These results suggest that different populations should be considered as different management units to achieve effective conservation and management purposes. The salangid Neosalanx taihuensis (Salangidae) is a commercially important economical fish endemic to China and restricted to large freshwater systems with a wide-ranging distribution. This fish species has continuous distribution ranges and a long-introduced aquaculture history in Chinese basins. However, the research on its population genetic differentiation within and between basins is very limited. In this regard, 197 individuals were sampled from 11 populations in the Nenjiang River Basin (A1-A4), Songhua River Basin (B1), Yellow River Basin (C1-C2), Yangtze River Basin (D1), Lanchang River Basin (E1-E2) and Huaihe River Basin (F1). Based on the COI sequence, the N. taihuensis population's genetic difference within and between river basins was investigated. The haplotypes and their frequency distributions were strongly skewed, with most haplotypes (n = 13) represented only in single samples each and thus restricted to a single population. The most common haplotype (H4, 67/197) was found in all individuals. The analysis of molecular variance (AMOVA) revealed a random pattern in the distribution of genetic diversity, which is inconsistent with contemporary hydrological structure. The mismatch between the distribution and neutrality tests supported the evidence of a population expansion, which occurred during the late Pleistocene (0.041-0.051 million years ago). Significant levels of genetic subdivision were detected among populations within basins rather than between the six basins. Population history dynamics showed that N. taihuensis experienced an expansion during the glacial period in the late Pleistocene. Therefore, different populations should be considered as different management units to achieve effective conservation and management purposes. These results have great significance for the evaluation and exploitation of the germplasm resources of N. taihuensis.

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