Species delineation and genetic structure of two Chaerephon species ( C. pusillus and C. leucogaster ) on Madagascar and the Comoro archipelago - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Ecology and Evolution Année : 2022

Species delineation and genetic structure of two Chaerephon species ( C. pusillus and C. leucogaster ) on Madagascar and the Comoro archipelago

Morgane Tidière
Elodie Portanier
Stéphanie Jacquet
  • Fonction : Auteur
Steven Goodman
  • Fonction : Auteur
Gildas Monnier
  • Fonction : Auteur
Gregory Beuneux
  • Fonction : Auteur
Jean‐françois Desmet
  • Fonction : Auteur
Cécile Kaerle
  • Fonction : Auteur
Guillaume Queney
  • Fonction : Auteur
Michel Barataud
  • Fonction : Auteur

Résumé

Abstract Cryptic species diversity is known to be common in bats but remains challenging to study in these mammals, whose natural history traits render their sampling and monitoring challenging. For these animals, indirect genetic approaches provide a powerful tool to gain insight into the evolutionary history and ecology of cryptic bat species. The speciation history of the polyphyletic Chaerephon pumilus species group (Molossidae) is poorly understood, including those found on western Indian Ocean islands. Two species in this complex have been identified in the Comoros: C. pusillus and C. leucogaster . Here, we aim to genetically characterize these two species and investigate their spatial population genetic structure. Analyzing five nuclear microsatellite markers from 200 individuals and one mitochondrial DNA gene ( Cyt‐b ) from 161 (out of the 200) individuals sampled on Madagascar and the Comoros, our findings indicated that these species are genetically differentiated. We observed mitonuclear discordance in numerous individuals (33% of the 161 mt DNA‐sequenced individuals). Based on ABC analyses, we found that this pattern could potentially be the result of asymmetric introgressive hybridization from C. leucogaster to C. pusillus and calls for further studies on the demographic history of these species. Moreover, at the intra‐specific level, analyses of the microsatellite loci suggested the evidence of a more pronounced, although weak, geographically based genetic structure in C. pusillus than in C. leucogaster . Altogether, our findings provide preliminary insights into the eco‐evolutionary aspects of this species complex and warrant further research to understand hybridization dynamics and mechanisms responsible for mitonuclear discordance.

Dates et versions

hal-04562352 , version 1 (29-04-2024)

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Morgane Tidière, Elodie Portanier, Stéphanie Jacquet, Steven Goodman, Gildas Monnier, et al.. Species delineation and genetic structure of two Chaerephon species ( C. pusillus and C. leucogaster ) on Madagascar and the Comoro archipelago. Ecology and Evolution, 2022, 12 (12), ⟨10.1002/ece3.9566⟩. ⟨hal-04562352⟩
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