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Publishing Language: Chinese | Open Access

Genetic differentiation analysis of cowpea thrips populations in Guangxi based on mitochondrial COI gene

Huan-Ting WANG1,2, Li-Fei HUANG2, Rui GONG2,3, Xue-Mei CAO2, Xia-Lin ZHENG1( ), Lang YANG1,2( )
College of Agriculture, Guangxi University, Nanning 530004, China
Guangxi Key Laboratory of Biology for Crop Diseases and Insect Pests/Key Laboratory of Green Prevention and Control on Fruits and Vegetables in South China, Ministry of Agriculture and Rural Affairs/Plant Protection Research Institution, Guangxi Academy of Agricultural Sciences, Nanning 530007, China
School of Marine Sciences and Biotechnology, Guangxi Minzu University, Nanning 530006, China
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Abstract

Aim

To elucidate the thrips species composition infesting cowpea fields of Guangxi,

Methods

systematic thrips sampling was conducted in cowpea fields across 14 prefecture-level municipalities. Mitochondrial cytochrome oxidase subunit I (COI) gene sequencing was employed to assess diversity, genetic differentiation, and phylogenetic relationships among thrips population.

Results

From the 234 successfully amplified sequence fragments, five thrips species were identified: Megalurothrips usitatus, Frankliniella intonsa, Thrips hawaiiensis, Thrips palmi, and Haplothrips chinensis. Among them, M. usitatus was the dominant species. Sequence analysis revealed seven distinct haplotypes in M. usitatus, six in F. intonsa, five each in T. hawaiiensis and H. chinensis, and two in T. palmi. Genetic differentiation and gene flow were observed among M. usitatus populations across most regions, followed by F. intonsa and H. chinensis. In contrast, T. hawaiiensis and T. palmi exhibited minimal genetic differentiation among most sampled locations, except in isolated cases.

Conclusion

This research provides a foundation for developing scientifically sound control strategies against cowpea thrips in the region.

Keywords

Cowpea thripsCOI genespopulation identificationgenetic differentiation
CLC number: Q968.1;Q963 Document code: A Article ID: 1674-0858(2026)01-0258-12

References

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Journal of Environmental Entomology
Volume 48 Issue 1,
January 2026
Pages 258-269
DOI: 10.3969/j.issn.1674-0858.2026.01.27

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Cite this article:
WANG H-T, HUANG L-F, GONG R, et al. Genetic differentiation analysis of cowpea thrips populations in Guangxi based on mitochondrial COI gene. Journal of Environmental Entomology, 2026, 48(1): 258-269. https://doi.org/10.3969/j.issn.1674-0858.2026.01.27

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Received: 28 July 2024
Revised: 30 December 2024
Accepted: 31 December 2024
Published: 05 January 2026
© 2026 Editorial Board of Journal of Environmental Entomology

This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).