Relative genomic impacts of translocation history, hatchery practices, and farm selection in Pacific oyster Crassostrea gigas throughout the Northern Hemisphere

Evolutionary Applications
Ben J G SutherlandKristina M. Miller

Abstract

Pacific oyster Crassostrea gigas, endemic to coastal Asia, has been translocated globally throughout the past century, resulting in self-sustaining introduced populations (naturalized). Oyster aquaculture industries in many parts of the world depend on commercially available seed (hatchery-farmed) or naturalized/wild oysters to move onto a farm (naturalized-farmed). It is therefore important to understand genetic variation among populations and farm types. Here, we genotype naturalized/wild populations from France, Japan, China, and most extensively in coastal British Columbia, Canada. We also genotype cultured populations from throughout the Northern Hemisphere to compare with naturalized populations. In total, 16,942 markers were identified using double-digest RAD-sequencing in 182 naturalized, 112 hatchery-farmed, and 72 naturalized-farmed oysters (n = 366). Consistent with previous studies, very low genetic differentiation was observed around Vancouver Island (mean FST = 0.0019) and low differentiation between countries in the Japan-Canada-France historical translocation lineage (France-Canada FST = 0.0024; Japan-Canada FST = 0.0060). Chinese populations were more differentiated (China-Japan FST = 0.0241). Hatchery-propagat...Continue Reading

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Citations

Jul 21, 2020·Evolutionary Applications·Anne-Laure FerchaudMaren Wellenreuther

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Methods Mentioned

BETA
amplicon
chips
electrophoresis
PCR
PCRs
Chip
deletion
genotyping
PCA

Software Mentioned

plink
Torrent Suite
custom
R
BayeScan
GitHub
vegan
gstacks
mem
workflow

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