Cited by 14Genetic diversity and population structureDiptera species taxonomy and behaviorMosquito-borne diseases and control

Limited genomic divergence between intraspecific forms of Culex pipiens under different ecological pressures

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Gomes, Bruno, Wilding, Craig S., Weetman, David, Sousa, Carla A., Novo, Maria T., Savage, Harry M., Almeida, António P. G., Pinto, João +1 more·2015·BMC Evolutionary Biology

Abstract

BACKGROUND: Divergent selection can be a major driver of ecological speciation. In insects of medical importance, understanding the speciation process is both of academic interest and public health importance. In the West Nile virus vector Culex pipiens, intraspecific pipiens and molestus forms vary in ecological and physiological traits. Populations of each form appear to share recent common ancestry but patterns of genetic differentiation across the genome remain unknown. Here, we undertook an AFLP genome scan on samples collected from both sympatric and allopatric populations from Europe and the USA to quantify the extent of genomic differentiation between the two forms. RESULTS: The forms were clearly differentiated but each exhibited major population sub-structuring between continents. Divergence between pipiens and molestus forms from USA was higher than in both inter- and intra-continental comparisons with European samples. The proportion of outlier loci between pipiens and molestus (≈3 %) was low but consistent in both continents, and similar to those observed between sibling species of other mosquito species which exhibit contemporary gene flow. Only two of the outlier loci were shared between inter-form comparisons made within Europe and USA. CONCLUSION: This study supports the molestus and pipiens status as distinct evolutionary entities with low genomic divergence. The low number of shared divergent loci between continents suggests a relatively limited number of genomic regions determining key typological traits likely to be driving incipient speciation and/or adaptation of molestus to anthropogenic habitats.

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Authors
Gomes, B., Wilding, C. S., Weetman, D., Sousa, C. A., Novo, M. T., Savage, H. M., Almeida, A. P. G., Pinto, J., & Donnelly, M. J.
Affiliations
  • Liverpool School of Tropical Medicine (GB)
  • Universidade Nova de Lisboa (PT)
  • Centers for Disease Control and Prevention (US)
Corresponding author
Gomes, Bruno
Venue
BMC Evolutionary Biology
Published
2015-09-16
Volume
15
Issue
1
Pages
197-197
ISSN
1471-2148 (ISSN-L)
OpenAlex
W1902333799
Cited by
14
References
57
Citations by year
2026: 1 · 2025: 2 · 2023: 1 · 2022: 4 · 2021: 2 · 2020: 1 · 2019: 1 · 2016: 2
FWCI
0.46
Type
journal article
Language
en
Open access
Locations
  • BMC Evolutionary Biology (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • LSTM Online Archive (Liverpool School of Tropical Medicine) (acceptedVersion)
  • Liverpool John Moores University (acceptedVersion)
  • Portuguese National Funding Agency for Science, Research and Technology (RCAAP Project by FCT) (submittedVersion, other-oa)
Funders
  • PhD fellowship of Fundação para a Ciência e Tecnologia/MCTES, Portugal (SFRH/BD/36410/2007)
  • Fundação para a Ciência e a Tecnologia/MCTES, Portugal (POCI/BIA-BDE/57650/2004, PPCDT/BIA-BDE/57650/2004)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic diversity and population structure
  • Life Sciences › Agricultural and Biological Sciences › Ecology, Evolution, Behavior and Systematics › Diptera species taxonomy and behavior
  • Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Mosquito-borne diseases and control
Keywords
Culex pipiens, Culex pipiens molestus, intraspecific divergence, ecological speciation, divergent selection, West Nile virus vector, mosquito population structure, outlier loci, gene flow, sympatric and allopatric populations, anthropogenic habitats
MeSH terms
Animals, Culex, Europe, Insect Vectors, United States, West Nile Fever, Cluster Analysis, Ecosystem, Microsatellite Repeats, Genetic Drift, Genetic Speciation, Gene Flow, Sympatry

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