Population genetic structure of the malaria vector Anopheles fluviatilis species T (Diptera: Culicidae) in India.

Anopheles fluviatilis James (Diptera: Culicidae) represents a complex that comprises four sibling species (S, T, U, and V). Among these, species T is widely distributed in India. Chromosomal inversion polymorphism exists among different geographic populations of An. fluviatilis species T; however, population genetic structure is not understood. This study inferred a genetic structure among six geographically diverse populations of species T using a panel of microsatellite markers. Analyses indicated a significant but low genetic differentiation among the majority of the studied populations. A significant correlation was observed between genetic and geographic distances, exhibiting stepwise migration patterns among populations.