Distribution of genetic variation among chromosomal forms of Anopheles gambiae s.s: introgressive hybridization, adaptive inversions, or recent reproductive isolation?
A series of four papers in this issue explores the reproductive status of the five chromosomal forms of An. gambiae s.s. using molecular techniques to examine the variation among twelve different genes located throughout the An. gambiae s.s. genome. Results of these and previous studies are consistent with a hypothesis of at least partial barriers to gene flow between some chromosomal forms in the Ivory Coast and other West African countries to the north and west, but introgression between S and M types in Benin and countries to the east. Collectively, these studies indicate the need for a broader geographical sampling of An. gambiae s.s., increased research on mechanisms of prezygotic reproductive isolation and field-based studies of survival and fecundity in hybrids to test for postzygotic reproductive isolation.
Department of Microbiology, Colorado State University, Fort Collins, CO 80523-1677, USA. wcb4@lamar.colo
W C
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Lanzaro
D000222:Adaptation, Physiological; D000818:Animals; D000852:Anopheles / Q000145:classification / Q000235:genetics* / Q000502:physiology; D007446:Chromosome Inversion; D004275:DNA, Ribosomal / Q000032:analysis; D003576:Electron Transport Complex IV / Q000235:genetics; D017344:Genes, Insect; D014644:Genetic Variation; D006162:Guanylate Cyclase / Q000235:genetics; D009693:Nucleic Acid Hybridization; D012339:RNA, Ribosomal, 28S / Q000032:analysis; D012098:Reproduction; D017422:Sequence Analysis, DNA
D004275:DNA, Ribosomal; D012339:RNA, Ribosomal, 28S; D003576:Electron Transport Complex IV; D006162:Guanylate Cyclase