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Microsatellite analysis of genetic diversity in wild and cultivated Portunus trituberculatus in Bohai Bay

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Abstract

Background

Previous studies have revealed a reduction in the genetic diversity of P. trituberculatus in Bohai Sea. However, because swimming crabs have been released into this area for some time, it is unclear whether the release of cultured populations from the national breeding farms of swimming crabs in Bohai Bay have affected the population genetics of wild populations of P. trituberculatus.

Methods and results

In this study, the genetic diversity and population structure of 120 P. trituberculatus specimens in Bohai Bay were investigated using six microsatellite loci, including one wild population and one cultivated population. A total of 132 alleles were identified for all loci. The mean expected (He) and observed heterozygosity (Ho) were 0.8185 and 0.7759, respectively, thus indicating high levels of genetic diversity for these two populations. Molecular variance analysis (AMOVA) (FST = 0.0180), genetic distance (D = 0.1168) and similarity (S = 0.8898) indicated that these two populations could not be distinguished genetically. Structural analysis, phylogenetic tree construction, and principal component analysis, showed no significant distinction between the wild and cultivated populations. Finally, we investigated genetic exchange between the two populations by analyzing migration rate (M) and gene flow (Nm), thus demonstrating significant flow of genetic information.

Conclusions

These findings contribute information for further breeding schemes for P. trituberculatus, evaluation of its genetic potential and programs for the protection of wild resources.

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Acknowledgements

The authors would like to express their gratitude to EditSprings (https://www.editsprings.cn/) for the expert linguistic services provided.

Funding

This work was supported by the Hebei Natural Science Foundation (C2016201249), Science and Technology Innovation Project of Modern Seed Industry (21326307D), Institute of Life Science and Green Development (Hebei University) and Innovation Center for Bioengineering and Biotechnology of Hebei Province.

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Authors and Affiliations

Authors

Contributions

BD: Conceptualization, Methodology, Software, Writing original draft. WL: Data curation, Formal analysis. SL: Data curation, Formal analysis. YY: Investigation, Formal analysis. YG: Validation, Methodology. SM and XK: Supervision, Project administration, Conceptualization, Writing-Review & Editing. ZL and XJ: Resources.

Corresponding authors

Correspondence to Shumei Mu or Xianjiang Kang.

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The authors declare that they have no competing interests.

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All animal experiments were compliant with the local approved protocols of the Administration Office Committee for Laboratory Animals, and aimed to minimize animal suffering.

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Duan, B., Liu, W., Li, S. et al. Microsatellite analysis of genetic diversity in wild and cultivated Portunus trituberculatus in Bohai Bay. Mol Biol Rep 49, 2543–2551 (2022). https://doi.org/10.1007/s11033-021-07054-w

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  • DOI: https://doi.org/10.1007/s11033-021-07054-w

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