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The adaptive potential of subtropical rainbowfish in the face of climate change: heritability and heritable plasticity for the expression of candidate genes

Whilst adaptation and phenotypic plasticity might buffer species against habitat degradation associated with global climate change, few studies making such claims also possess the necessary and sufficient data to support them. Doing so requires demonstration of heritable variation in traits affectin...

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Autores principales: McCairns, R. J. Scott, Smith, Steve, Sasaki, Minami, Bernatchez, Louis, Beheregaray, Luciano B.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4831457/
https://www.ncbi.nlm.nih.gov/pubmed/27099620
http://dx.doi.org/10.1111/eva.12363
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author McCairns, R. J. Scott
Smith, Steve
Sasaki, Minami
Bernatchez, Louis
Beheregaray, Luciano B.
author_facet McCairns, R. J. Scott
Smith, Steve
Sasaki, Minami
Bernatchez, Louis
Beheregaray, Luciano B.
author_sort McCairns, R. J. Scott
collection PubMed
description Whilst adaptation and phenotypic plasticity might buffer species against habitat degradation associated with global climate change, few studies making such claims also possess the necessary and sufficient data to support them. Doing so requires demonstration of heritable variation in traits affecting fitness under new environmental conditions. We address this issue using an emerging aquatic system to study adaptation to climate change, the crimson‐spotted rainbowfish (Melanotaenia duboulayi), a freshwater species from a region of eastern Australia projected to be affected by marked temperature increases. Captive born M. duboulayi of known pedigree were used to assess the long‐term effects of contemporary and 2070‐projected summer temperatures on the expression of genes previously identified in a climate change transcriptomics (RNA‐Seq) experiment. Nearly all genes responded to increasing temperature. Significant additive genetic variance explained a moderate proportion of transcriptional variation for all genes. Most genes also showed broad‐sense genetic variation in transcriptional plasticity. Additionally, molecular pathways of candidate genes co‐occur with genes inferred to be under climate‐mediated selection in wild M. duboulayi populations. Together, these results indicate the presence of existing variation in important physiological traits, and the potential for adaptive responses to a changing thermal environment.
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spelling pubmed-48314572016-04-20 The adaptive potential of subtropical rainbowfish in the face of climate change: heritability and heritable plasticity for the expression of candidate genes McCairns, R. J. Scott Smith, Steve Sasaki, Minami Bernatchez, Louis Beheregaray, Luciano B. Evol Appl Original Articles Whilst adaptation and phenotypic plasticity might buffer species against habitat degradation associated with global climate change, few studies making such claims also possess the necessary and sufficient data to support them. Doing so requires demonstration of heritable variation in traits affecting fitness under new environmental conditions. We address this issue using an emerging aquatic system to study adaptation to climate change, the crimson‐spotted rainbowfish (Melanotaenia duboulayi), a freshwater species from a region of eastern Australia projected to be affected by marked temperature increases. Captive born M. duboulayi of known pedigree were used to assess the long‐term effects of contemporary and 2070‐projected summer temperatures on the expression of genes previously identified in a climate change transcriptomics (RNA‐Seq) experiment. Nearly all genes responded to increasing temperature. Significant additive genetic variance explained a moderate proportion of transcriptional variation for all genes. Most genes also showed broad‐sense genetic variation in transcriptional plasticity. Additionally, molecular pathways of candidate genes co‐occur with genes inferred to be under climate‐mediated selection in wild M. duboulayi populations. Together, these results indicate the presence of existing variation in important physiological traits, and the potential for adaptive responses to a changing thermal environment. John Wiley and Sons Inc. 2016-02-18 /pmc/articles/PMC4831457/ /pubmed/27099620 http://dx.doi.org/10.1111/eva.12363 Text en © 2016 The Authors. Evolutionary Applications published by John Wiley & Sons Ltd. This is an open access article under the terms of the Creative Commons Attribution (http://creativecommons.org/licenses/by/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
spellingShingle Original Articles
McCairns, R. J. Scott
Smith, Steve
Sasaki, Minami
Bernatchez, Louis
Beheregaray, Luciano B.
The adaptive potential of subtropical rainbowfish in the face of climate change: heritability and heritable plasticity for the expression of candidate genes
title The adaptive potential of subtropical rainbowfish in the face of climate change: heritability and heritable plasticity for the expression of candidate genes
title_full The adaptive potential of subtropical rainbowfish in the face of climate change: heritability and heritable plasticity for the expression of candidate genes
title_fullStr The adaptive potential of subtropical rainbowfish in the face of climate change: heritability and heritable plasticity for the expression of candidate genes
title_full_unstemmed The adaptive potential of subtropical rainbowfish in the face of climate change: heritability and heritable plasticity for the expression of candidate genes
title_short The adaptive potential of subtropical rainbowfish in the face of climate change: heritability and heritable plasticity for the expression of candidate genes
title_sort adaptive potential of subtropical rainbowfish in the face of climate change: heritability and heritable plasticity for the expression of candidate genes
topic Original Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4831457/
https://www.ncbi.nlm.nih.gov/pubmed/27099620
http://dx.doi.org/10.1111/eva.12363
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