Genomics of altitude-associated wing shape in two tropical butterflies.

Autor: Montejo-Kovacevich G; Department of Zoology, University of Cambridge, Cambridge, UK., Salazar PA; Animal and Plant Sciences, University of Sheffield, Sheffield, UK., Smith SH; Animal and Plant Sciences, University of Sheffield, Sheffield, UK., Gavilanes K; Universidad Regional Amazónica de Ikiam, Tena, Ecuador., Bacquet CN; Universidad Regional Amazónica de Ikiam, Tena, Ecuador., Chan YF; Friedrich Miescher Laboratory of the Max Planck Society, Tübingen, Germany., Jiggins CD; Department of Zoology, University of Cambridge, Cambridge, UK., Meier JI; Department of Zoology, University of Cambridge, Cambridge, UK.; St John's College, University of Cambridge, Cambridge, UK., Nadeau NJ; Animal and Plant Sciences, University of Sheffield, Sheffield, UK.
Jazyk: angličtina
Zdroj: Molecular ecology [Mol Ecol] 2021 Dec; Vol. 30 (23), pp. 6387-6402. Date of Electronic Publication: 2021 Jul 28.
DOI: 10.1111/mec.16067
Abstrakt: Understanding how organisms adapt to their local environment is central to evolution. With new whole-genome sequencing technologies and the explosion of data, deciphering the genomic basis of complex traits that are ecologically relevant is becoming increasingly feasible. Here, we studied the genomic basis of wing shape in two Neotropical butterflies that inhabit large geographical ranges. Heliconius butterflies at high elevations have been shown to generally have rounder wings than those in the lowlands. We reared over 1,100 butterflies from 71 broods of H. erato and H. melpomene in common-garden conditions and showed that wing aspect ratio, that is, elongatedness, is highly heritable in both species and that elevation-associated wing aspect ratio differences are maintained. Genome-wide associations with a published data set of 666 whole genomes from across a hybrid zone, uncovered a highly polygenic basis to wing aspect ratio variation in the wild. We identified several genes that have roles in wing morphogenesis or wing aspect ratio variation in Drosophila flies, making them promising candidates for future studies. There was little evidence for molecular parallelism in the two species, with only one shared candidate gene, nor for a role of the four known colour pattern loci, except for optix in H. erato. Thus, we present the first insights into the heritability and genomic basis of within-species wing aspect ratio in two Heliconius species, adding to a growing body of evidence that polygenic adaptation may underlie many ecologically relevant traits.
(© 2021 The Authors. Molecular Ecology published by John Wiley & Sons Ltd.)
Databáze: MEDLINE
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