Genetic diversity and differentiation between Palearctic and Nearctic populations ofAedimorphus (=Aedes) vexans(Meigen, 1830) (Diptera, Culicidae)

Abstract

Genetic diversity was studied at allozyme loci in two Palearctic and one Nearctic population of Aedimorphus (=Aedes) vexans, a species of public health and veterinary importance. The population from Serbia was the most polymorphic (P = 35%) with the highest observed heterozygosity (H o = 0.027). The lowest observed heterozygosity (H o = 0.010) was obtained for the Nearctic population. All analyses based on individual (STRUCTURE analysis) and population level (pairwise F ST, Nm values, AMOVA, Nei's D value) revealed significant structuring between Nearctic and Palearctic populations, indicating a lack of gene flow and thus, the presence of independent gene pools. Taxon-specific alleles at the diagnostic Ao, , and Idh-2 loci were used for identification and separation of Nearctic and Palearctic populations. Population genetics study provided valuable information on the correct distinction of Am. vexans populations and their adaptive potential that could find a future use in the studies of vector competence and development of vectorcontrol strategies. Journal of Vector Ecology 38 (1): 154-162. 2013.

Genetic and phenotypic variation in central and northern European populations ofAedes (Aedimorphus) vexans(Meigen, 1830) (Diptera, Culicidae)

“…Data presented are similar to those observed in samples of Ae. vexans collected 14 and 16 years ago in Novi Sad (Milankov et al , Krtinić et al ) and populations from Germany and California, U.S.A. (Krtinić et al ).…”

“…Distinction between subspecies was defined by adult morphological traits, including tergites, mid‐tibia, and male palpi (Gutsevich , White ) and ND4 mitochondrial DNA (mtDNA), while the 5’ end of cytochrome oxidase I mtDNA (‘barcoding’ fragment) was found to be only partially useful (Cywinska et al ). However, Krtinić et al () used population diagnostic isozyme loci and observed a lack of gene flow between Ae. vexans populations in North America and Europe, indicating the presence of independent gene pools.…”

North America Insect Invades the World: the Case of the Flood Mosquito,Aedes vexans(Diptera: Culicidae), from Mitochondrial DNA

“…The A. vexans mosquito showed significant genetic divergence among some populations from the American continent with respect to some European and Asian populations (Table 4). [64], analyzing natural A. vexans populations from the United States and Germany, found that these do not share a common gene pool, proposing that the geographic barriers formed by the Atlantic and Pacific Oceans impede gene flow and cause genetic changes in the evolutionary lineages of A. vexans. However, our results suggest no existence of geographic and genetic isolation.…”