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Mosquito genomics. Extensive introgression in a malaria vector species complex revealed by phylogenomics

Fontaine, Michael C
Pease, James B
Steele, Aaron
Neafsey, Daniel E
Sharakhov, Igor V
Jiang, Xiaofang
Hall, Andrew B
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Published in Science. 2015, vol. 347, no. 6217, p. 1258524
Abstract Introgressive hybridization is now recognized as a widespread phenomenon, but its role in evolution remains contested. Here, we use newly available reference genome assemblies to investigate phylogenetic relationships and introgression in a medically important group of Afrotropical mosquito sibling species. We have identified the correct species branching order to resolve a contentious phylogeny and show that lineages leading to the principal vectors of human malaria were among the first to split. Pervasive autosomal introgression between these malaria vectors means that only a small fraction of the genome, mainly on the X chromosome, has not crossed species boundaries. Our results suggest that traits enhancing vectorial capacity may be gained through interspecific gene flow, including between nonsister species.
Keywords AnimalsAnopheles/classification/genetics/growth & developmentChromosomes, Insect/geneticsEvolution, MolecularGenome, InsectGenomicsHumansInsect Vectors/geneticsMalaria/transmissionPhylogenyPolymorphism, GeneticPupa/anatomy & histology/growth & developmentX Chromosome/genetics
PMID: 25431491
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FONTAINE, Michael C et al. Mosquito genomics. Extensive introgression in a malaria vector species complex revealed by phylogenomics. In: Science, 2015, vol. 347, n° 6217, p. 1258524. doi: 10.1126/science.1258524 https://archive-ouverte.unige.ch/unige:90492

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Deposited on : 2016-12-16

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