Volume 73, Issue 3
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645


A population genetics study of the mosquito was performed on 36 collections from adjoining regions of Iowa, Minnesota, and Wisconsin covering approximately 120 km. Single nucleotide polymorphism analysis was used to estimate variation in the mitochondrial NADH dehydrogenase subunit 4 (ND4) gene. The heated oligonucleotide ligation assay was used to identify the ND4 haplotype of each mosquito. No evidence of genetic isolation by distance was found, nor did Interstate 90 or the Mississippi River serve as barriers to gene flow. The effective migration rate varied from 18 to 45 reproductive migrants/generation, which is similar to estimates from an earlier study. The collections belong to a single, large, panmictic population. However, within this panmictic population, local genetic drift arises, possibly due to one or a few females ovipositing in larval breeding containers. From generation to generation, there is sufficient gene flow to mix families arising from individual breeding sites and eliminate founder effects due to drift.


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  • Received : 05 Jan 2005
  • Accepted : 18 Apr 2005

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