Journal of Medical Entomology (1996) 33, 894-900

Gladys B. De Sousa, Adolfo Jiménez, Antonio Blanco and Cristina N. Gardenal (1996)
Gene flow in Aedes albifasciatus (Diptera: Culicidae) from central Argentina
Journal of Medical Entomology 33 (6), 894-900
Abstract: To estimate gene flow among populations of the floodwater mosquito Aedes albifasciatus, allozymic frequencies were analyzed at 16 loci in samples from 6 localities in central Argentina. Expected mean heterozygosity ranged from 0.057 to 0.137. F_ST was significant for 5 of 11 polymorphic loci; mean value was 0.024, which gave an Nm of 50.96. Levels of genetic identity among samples were high (I_N between 0.9815 and 0.9988) even between populations 500 km apart. However, there was a significant correlation between genetic and geographic distance, which indicated that although the 6 populations were at approximate equilibrium because of gene flow, this was restricted by distance. The distribution of allele frequencies possibly reflected the present status of a single large population occupying this region in the past. When geological change separated breeding areas, a moderate level of gene flow may have resulted in the current genetic structure of the populations.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Database assignments for author(s): Cristina Noemi Gardenal

Research topic(s) for pests/diseases/weeds:
general biology - morphology - evolution

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Aedes albifasciatus		Argentina