2022
DOI: 10.3389/fmars.2022.925845
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Genetic Variation in Heat Tolerance of the Coral Platygyra Daedalea Indicates Potential for Adaptation to Ocean Warming

Abstract: Ocean warming represents the greatest threat to the persistence of reef ecosystems. Most coral populations are projected to experience temperatures above their current bleaching thresholds annually by 2050. Adaptation to higher temperatures is necessary if corals are to persist in a warming future. While many aspects of heat stress have been well studied, few data are available for predicting the capacity for adaptive cross-generational responses in corals. Consistent sets of heat tolerant genomic markers that… Show more

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Cited by 6 publications
(7 citation statements)
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“…Interactions between loci (e.g. antagonist, synergistic, neutral) as well as functional redundancy between genomic regions or with other holobiont partners 57 , may also explain why direction of changes in allele frequencies are not necessarily consistent with changes in phenotypic response 43 . The thermal tolerance benefit arising from having a certain allele may therefore depends on allelic combinations at many other loci as well as transcriptional and post-transcriptional regulation such as epigenetics 33 .…”
Section: Challenges Of Building a Tolerance Index Using Snps Datamentioning
confidence: 99%
See 1 more Smart Citation
“…Interactions between loci (e.g. antagonist, synergistic, neutral) as well as functional redundancy between genomic regions or with other holobiont partners 57 , may also explain why direction of changes in allele frequencies are not necessarily consistent with changes in phenotypic response 43 . The thermal tolerance benefit arising from having a certain allele may therefore depends on allelic combinations at many other loci as well as transcriptional and post-transcriptional regulation such as epigenetics 33 .…”
Section: Challenges Of Building a Tolerance Index Using Snps Datamentioning
confidence: 99%
“…Despite evidences of contemporary increases in coral heat tolerance 40,41 , whether or not genetic adaptation through natural selection of beneficial host and symbiont traits can keep pace with global warming is still unknown. It depends in particular on several parameters that are undetermined in most taxa such as heat tolerance heritability [42][43][44] , selection differential 43 , covariance between traits 45 and potential tradeoffs 46,47 . Identifying genetic markers involved in heat tolerance and understanding their distribution through time and space is therefore crucial to predict the future of coral reefs [48][49][50][51][52] as well as targeting tolerant populations and individuals for conservation 53,54 and restoration 44,55,56 .…”
Section: Introductionmentioning
confidence: 99%
“…Heat tolerance in corals is polygenic, thus driven by many loci of small effect size 36 , with possible epistasis (e.g., antagonist, synergistic, neutral) and functional redundancy between genomic regions and with other holobiont partners 61 . This may explain why direction of changes in allele frequencies are not necessarily consistent with changes in phenotypic response 45 . The thermal tolerance bene t arising from having a certain allele at a HAL may therefore depend on allelic combination at many other loci as well as transcriptional and post-transcriptional regulation such as epigenetics 34 .…”
Section: Absence Of Visible Health Impairment Under Moderate Heat Stressmentioning
confidence: 99%
“…Despite evidences for contemporary increases in coral heat tolerance [41][42][43] , whether or not genetic adaptation through natural selection of bene cial host and symbiont traits can keep pace with global warming is still unknown. It depends in particular on several parameters that are undetermined in most taxa such as heat tolerance heritability [44][45][46] , selection differential 45 , covariance between traits (e.g., growth and symbiont retention) 47 and potential tradeoffs 48,49 . Identifying genetic markers involved in heat tolerance and understanding their distribution through time and space is therefore crucial to predict the future of coral reefs [50][51][52][53][54] as well as targeting tolerant populations and individuals for conservation [55][56][57][58] and restoration 46,59,60 .…”
Section: Introductionmentioning
confidence: 99%
See 1 more Smart Citation