Genomic signatures in the coral holobiont reveal host adaptations driven by Holocene climate change and reef specific symbionts.

ABSTRACT: Genetic signatures caused by demographic and adaptive processes during past climatic shifts can inform predictions of species' responses to anthropogenic climate change. To identify these signatures in Acropora tenuis, a reef-building coral threatened by global warming, we first assembled the genome from long reads and then used shallow whole-genome resequencing of 150 colonies from the central inshore Great Barrier Reef to inform population genomic analyses. We identify population structure in the host that reflects a Pleistocene split, whereas photosymbiont differences between reefs most likely reflect contemporary (Holocene) conditions. Signatures of selection in the host were associated with genes linked to diverse processes including osmotic regulation, skeletal development, an

SUBMITTER: Cooke I 

PROVIDER: S-EPMC7695477 | biostudies-literature | 2020 Nov

REPOSITORIES: biostudies-literature