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Magallana gigas

ABSTRACT: Divergence and plasticity shape adaptive potential in the Pacific oyster

PROVIDER: PRJNA394055 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR6062980_1.fastq.gz	Fastqsanger.gz
	SRR6062980_2.fastq.gz	Fastqsanger.gz
	SRR6062990_1.fastq.gz	Fastqsanger.gz
	SRR6062990_2.fastq.gz	Fastqsanger.gz
	SRR6063000_1.fastq.gz	Fastqsanger.gz

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Fine-scale adaptive divergence and plasticity revealed by genetic and phenotypic variation in a marine invertebrate

Project description:The interplay between phenotypic plasticity and adaptive evolution has long been an important topic of evolutionary biology. This process is critical to our understanding of a species evolutionary potential in light of rapid climate changes. Despite recent theoretical work, empirical studies of natural populations, especially in marine invertebrates, are scarce. In this study, we investigated the relationship between adaptive divergence and plasticity by integrating genetic and phenotypic variation in Pacific oysters from its natural range in China. Genome resequencing of 371 oysters revealed unexpected fine-scale genetic structure that is largely consistent with phenotypic divergence in growth, physiology, thermal tolerance and gene expression across environmental gradient. These findings suggest that selection and local adaptation are pervasive and together with limited gene flow shape adaptive divergence. Plasticity in gene expression is positively correlated with evolved divergence, indicating that plasticity is adaptive and likely favored by selection in organisms facing dynamic environments such as oysters. Divergence in heat response and tolerance implies that the evolutionary potential to a warming climate differs among oyster populations. We suggest that trade-offs in energy allocation are important to adaptive divergence with acetylation playing a role in energy depression under thermal stress.

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