Genomic evidence for role of inversion 3RP of Drosophila melanogaster in facilitating climate change adaptation.

Détails

ID Serval
serval:BIB_6FB0D3B0E7B6
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Genomic evidence for role of inversion 3RP of Drosophila melanogaster in facilitating climate change adaptation.
Périodique
Molecular Ecology
Auteur(s)
Rane R.V., Rako L., Kapun M., Lee S.F., Hoffmann A.A.
ISSN
1365-294X (Electronic)
ISSN-L
0962-1083
Statut éditorial
Publié
Date de publication
2015
Peer-reviewed
Oui
Volume
24
Numéro
10
Pages
2423-2432
Langue
anglais
Résumé
Chromosomal inversion polymorphisms are common in animals and plants, and recent models suggest that alternative arrangements spread by capturing different combinations of alleles acting additively or epistatically to favour local adaptation. It is also thought that inversions typically maintain favoured combinations for a long time by suppressing recombination between alternative chromosomal arrangements. Here, we consider patterns of linkage disequilibrium and genetic divergence in an old inversion polymorphism in Drosophila melanogaster (In(3R)Payne) known to be associated with climate change adaptation and a recent invasion event into Australia. We extracted, karyotyped and sequenced whole chromosomes from two Australian populations, so that changes in the arrangement of the alleles between geographically separated tropical and temperate areas could be compared. Chromosome-wide linkage disequilibrium (LD) analysis revealed strong LD within the region spanned by In(3R)Payne. This genomic region also showed strong differentiation between the tropical and the temperate populations, but no differentiation between different karyotypes from the same population, after controlling for chromosomal arrangement. Patterns of differentiation across the chromosome arm and in gene ontologies were enhanced by the presence of the inversion. These data support the notion that inversions are strongly selected by bringing together combinations of genes, but it is still not clear if such combinations act additively or epistatically. Our data suggest that climatic adaptation through inversions can be dynamic, reflecting changes in the relative abundance of different forms of an inversion and ongoing evolution of allelic content within an inversion.
Mots-clé
climatic adaptation, evolution, genomics, inversion
Pubmed
Web of science
Création de la notice
20/03/2015 13:11
Dernière modification de la notice
20/08/2019 15:28
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