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  Repeated genetic adaptation to high altitude in two tropical butterflies

Montejo-Kovacevich, G., Meier, J., Bacquet, C., Warren, I., Chan, Y., Kucka, M., et al. (2022). Repeated genetic adaptation to high altitude in two tropical butterflies. Nature Communications, 13: 4676. doi:10.1038/s41467-022-32316-x.

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Montejo-Kovacevich, G, Author
Meier, JI, Author
Bacquet, CN, Author
Warren, IA, Author
Chan, YF1, Author           
Kucka, M1, Author           
Salazar, C, Author
Rueda, N, Author
Montgomery, SH, Author
McMillan, WO, Author
Kozak, KM, Author
Nadeau, NJ, Author
Martin, S, Author
Jiggins, CD, Author
Affiliations:
1Chan Group, Friedrich Miescher Laboratory, Max Planck Society, ou_3008688              

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 Abstract: Repeated evolution can provide insight into the mechanisms that facilitate adaptation to novel or changing environments. Here we study adaptation to altitude in two tropical butterflies, Heliconius erato and H. melpomene, which have repeatedly and independently adapted to montane habitats on either side of the Andes. We sequenced 518 whole genomes from altitudinal transects and found many regions differentiated between highland (~ 1200 m) and lowland (~ 200 m) populations. We show repeated genetic differentiation across replicate populations within species, including allopatric comparisons. In contrast, there is little molecular parallelism between the two species. By sampling five close relatives, we find that a large proportion of divergent regions identified within species have arisen from standing variation and putative adaptive introgression from high-altitude specialist species. Taken together our study supports a role for both standing genetic variation and gene flow from independently adapted species in promoting parallel local adaptation to the environment.

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 Dates: 2022-08
 Publication Status: Published online
 Pages: -
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 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1038/s41467-022-32316-x
PMID: 35945236
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Title: Nature Communications
  Abbreviation : Nat. Commun.
Source Genre: Journal
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Publ. Info: London : Nature Publishing Group
Pages: 16 Volume / Issue: 13 Sequence Number: 4676 Start / End Page: - Identifier: ISSN: 2041-1723
CoNE: https://pure.mpg.de/cone/journals/resource/2041-1723