Genetic markers for antioxidant capacity in a reef-building coral

Jin, Young K,, Lundgren, Petra, Lutz, Adrian, Raina, Jean-Baptiste, Howells, Emily J., Paley, Allison S., Willis, Bette L., and Van Oppen, Madeleine J.H. (2016) Genetic markers for antioxidant capacity in a reef-building coral. Science Advances, 2. e1500842. pp. 1-7.

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Abstract

The current lack of understanding of the genetic basis under lying environmental stress tolerance in reef-building corals impairs the development of new management approaches to confronting the global demise of coral reefs. On the Great Barrier Reef (GBR), an approximately 51% decline in coral cover occurred over the period 1985 – 2012.

We conducted a gene-by-environment association analysis across 12° atitude on the GBR,as wel as both insitu and laboratory genotype-by-phenotype association analyses. These analyses allowed us to identify alleles at two genetic loci that account for differences in environmental stress tolerance and antioxidant capacity in the common coral Acropora millepora. The effect size for antioxidant capacity was considerable and biologically relevant (32.5 and 14.6% for the two loci). Antioxidant capacity is a critical component of stress tolerance because a multitude of environmental stressors cause increased cellular levels of reactive oxygen species. Our findings provide the first step toward the development of novel coral reef management approaches, such as spatial mapping of stress tolerance for use in marine protected area design, identification of stress-tolerant colonies for assisted migration, and marker-assisted selective breeding to create more tolerant genotypes for restoration of denuded reef.

Item ID: 48428
Item Type: Article (Research - C1)
ISSN: 2375-2548
Additional Information:

2016 © The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).

Funders: Australian Institute of Marine Science (AIMS), ARC Centre of Excellence for Coral Reef Studies, AIMS@JCU
Date Deposited: 17 May 2017 00:14
FoR Codes: 06 BIOLOGICAL SCIENCES > 0604 Genetics > 060411 Population, Ecological and Evolutionary Genetics @ 60%
05 ENVIRONMENTAL SCIENCES > 0502 Environmental Science and Management > 050202 Conservation and Biodiversity @ 20%
06 BIOLOGICAL SCIENCES > 0602 Ecology > 060205 Marine and Estuarine Ecology (incl Marine Ichthyology) @ 20%
SEO Codes: 96 ENVIRONMENT > 9608 Flora, Fauna and Biodiversity > 960808 Marine Flora, Fauna and Biodiversity @ 100%
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