Pubblicazione scientifica

Adaptive genetic variation distinguishes Chilean blue mussels (Mytilus chilensis) from different marine environments

FILONE TECNOLOGICO	TEMA
economia circolare e sostenibilità
produzione e raccolta

RIASSUNTO

Abstract

Chilean mussel populations have been thought to be panmictic with limited genetic structure. Genotyping‐by‐sequencing approaches have enabled investigation of genomewide variation that may better distinguish populations that have evolved in different environments. We investigated neutral and adaptive genetic variation in Mytilus from six locations in southern Chile with 1240 SNPs obtained with RAD‐seq. Differentiation among locations with 891 neutral SNPs was low ( FST = 0.005). Higher differentiation was obtained with a panel of 58 putative outlier SNPs ( FST = 0.114) indicating the potential for local adaptation. This panel identified clusters of genetically related individuals and demonstrated that much of the differentiation (~92%) could be attributed to the three major regions and environments: extreme conditions in Patagonia, inner bay influenced by aquaculture (Reloncaví), and outer bay (Chiloé Island). Patagonia samples were most distinct, but additional analysis carried out excluding this collection also revealed adaptive divergence between inner and outer bay samples. The four locations within Reloncaví area were most similar with all panels of markers, likely due to similar environments, high gene flow by aquaculture practices, and low geographical distance. Our results and the SNP markers developed will be a powerful tool supporting management and programs of this harvested species.

DATA

Data di pubblicazione: 26/04/2016

AUTORI

ARANEDA CRISTIAN
LARRAIN MARIA ANGELICA
HECHT BENJAMIN
NARUM SHAWN

ENTE DI AFFERENZA

Columbia River Inter‐Tribal Fish Commission 3059‐F National Fish Hatchery Road Hagerman ID 83332
DEPARTAMENTO DE PROD ANIMAL FACULTAD DE CIENCIAS AGRONOMICAS UNIV CHILE AVDA SANTA ROSA 11315 LA PINTANA 8820808 SANTIAGO CHILE
DEPARTAMENTO DE CIENCIA DE LOS ALIMENTOS Y TECNOLOGIA QUIM FACULTAD DE CIENCIAS QUIM Y FARMA UNIV CHILE SERGIO LIVINGSTONE 1007 INDEPENDENCIA 8380492 SANTIAGO CHILE

RIVISTA

Ecology and Evolution, 6(11), 3632-3644

IMPACT FACTOR

2,540

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