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Evolutionary stability inferred for a free ranging lizard with sex‐reversal

The sex of vertebrates is typically determined genetically, but reptile sex can also be determined by developmental temperature. In some reptiles, temperature interacts with genotype to reverse sex, potentially leading to transitions from a chromosomal to a temperature‐dependent sex determining syst...

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Autores principales: Wild, Kristoffer H., Roe, John H., Schwanz, Lisa, Georges, Arthur, Sarre, Stephen D.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9303591/
https://www.ncbi.nlm.nih.gov/pubmed/35178809
http://dx.doi.org/10.1111/mec.16404
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author Wild, Kristoffer H.
Roe, John H.
Schwanz, Lisa
Georges, Arthur
Sarre, Stephen D.
author_facet Wild, Kristoffer H.
Roe, John H.
Schwanz, Lisa
Georges, Arthur
Sarre, Stephen D.
author_sort Wild, Kristoffer H.
collection PubMed
description The sex of vertebrates is typically determined genetically, but reptile sex can also be determined by developmental temperature. In some reptiles, temperature interacts with genotype to reverse sex, potentially leading to transitions from a chromosomal to a temperature‐dependent sex determining system. Transitions between such systems in nature are accelerated depending on the frequency and fitness of sex‐reversed individuals. The Central Bearded Dragon, Pogona vitticeps, exhibits female heterogamety (ZZ/ZW) but can have its sex reversed from ZZ male to ZZ female by high incubation temperatures. The species exhibits sex‐reversal in the wild and it has been suggested that climate change and fitness of sex‐reversed individuals could be increasing the frequency of reversal within the species range. Transitions to temperature‐dependent sex determination require low levels of dispersal and high (>50%) rates of sex‐reversal. Here, we combine genotype‐by‐sequencing, identification of phenotypic and chromosomal sex, exhaustive field surveys, and radio telemetry to examine levels of genetic structure, rates of sex‐reversal, movement, space use, and survival of P. vitticeps in a location previously identified as a hot spot for sex‐reversal. We find that the species exhibits low levels of population structure (FST ~0.001) and a modest (~17%) rate of sex‐reversal, and that sex‐reversed and nonsex‐reversed females have similar survival and behavioural characteristics to each other. Overall, our data indicate this system is evolutionary stable, although we do not rule out the prospect of a more gradual transition in sex‐determining mechanisms in the future in a more fragmented landscape and as global temperatures increase.
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spelling pubmed-93035912022-07-28 Evolutionary stability inferred for a free ranging lizard with sex‐reversal Wild, Kristoffer H. Roe, John H. Schwanz, Lisa Georges, Arthur Sarre, Stephen D. Mol Ecol ORIGINAL ARTICLES The sex of vertebrates is typically determined genetically, but reptile sex can also be determined by developmental temperature. In some reptiles, temperature interacts with genotype to reverse sex, potentially leading to transitions from a chromosomal to a temperature‐dependent sex determining system. Transitions between such systems in nature are accelerated depending on the frequency and fitness of sex‐reversed individuals. The Central Bearded Dragon, Pogona vitticeps, exhibits female heterogamety (ZZ/ZW) but can have its sex reversed from ZZ male to ZZ female by high incubation temperatures. The species exhibits sex‐reversal in the wild and it has been suggested that climate change and fitness of sex‐reversed individuals could be increasing the frequency of reversal within the species range. Transitions to temperature‐dependent sex determination require low levels of dispersal and high (>50%) rates of sex‐reversal. Here, we combine genotype‐by‐sequencing, identification of phenotypic and chromosomal sex, exhaustive field surveys, and radio telemetry to examine levels of genetic structure, rates of sex‐reversal, movement, space use, and survival of P. vitticeps in a location previously identified as a hot spot for sex‐reversal. We find that the species exhibits low levels of population structure (FST ~0.001) and a modest (~17%) rate of sex‐reversal, and that sex‐reversed and nonsex‐reversed females have similar survival and behavioural characteristics to each other. Overall, our data indicate this system is evolutionary stable, although we do not rule out the prospect of a more gradual transition in sex‐determining mechanisms in the future in a more fragmented landscape and as global temperatures increase. John Wiley and Sons Inc. 2022-02-27 2022-04 /pmc/articles/PMC9303591/ /pubmed/35178809 http://dx.doi.org/10.1111/mec.16404 Text en © 2022 The Authors. Molecular Ecology published by John Wiley & Sons Ltd. https://creativecommons.org/licenses/by-nc-nd/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc-nd/4.0/ (https://creativecommons.org/licenses/by-nc-nd/4.0/) License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made.
spellingShingle ORIGINAL ARTICLES
Wild, Kristoffer H.
Roe, John H.
Schwanz, Lisa
Georges, Arthur
Sarre, Stephen D.
Evolutionary stability inferred for a free ranging lizard with sex‐reversal
title Evolutionary stability inferred for a free ranging lizard with sex‐reversal
title_full Evolutionary stability inferred for a free ranging lizard with sex‐reversal
title_fullStr Evolutionary stability inferred for a free ranging lizard with sex‐reversal
title_full_unstemmed Evolutionary stability inferred for a free ranging lizard with sex‐reversal
title_short Evolutionary stability inferred for a free ranging lizard with sex‐reversal
title_sort evolutionary stability inferred for a free ranging lizard with sex‐reversal
topic ORIGINAL ARTICLES
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9303591/
https://www.ncbi.nlm.nih.gov/pubmed/35178809
http://dx.doi.org/10.1111/mec.16404
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