10.5061/DRYAD.32Q80
Thompson, Jessica A.
Stow, Adam J.
Raftos, David A.
Thompson, JA
Macquarie University
Stow, AJ
Macquarie University
Raftos, DA
Macquarie University
Data from: Lack of genetic introgression between wild and selectively bred
Sydney rock oysters Saccostrea glomerata
Dryad
dataset
2018
Selective breeding
Aquaculture
2018-04-12T00:00:00Z
2018-04-12T00:00:00Z
en
https://doi.org/10.3354/meps12109
729706 bytes
1
CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
Sydney rock oysters Saccostrea glomerata are among the most important
estuarine species on the eastern coast of Australia and also the basis of
a major aquaculture industry. The industry now largely relies on Sydney
rock oysters that have been selectively bred for fast growth and disease
resistance. Selectively bred S. glomerata are currently farmed in
estuaries that also sustain wild populations of Sydney rock oysters,
providing the opportunity for interbreeding. This has led to concern that
gene flow from farmed, selectively bred oysters could alter the genetic
variability of wild oyster populations. Here, we use next-generation
genotype-by-sequencing to test for genetic introgression between wild and
farmed, selectively bred (B2 line) Sydney rock oysters from 2 sites in the
Georges River, NSW. Strong genetic partitioning was identified between the
wild and selectively bred populations. There was no evidence of gene flow
in the form of introgression, even though selectively bred B2 oysters have
been farmed in the Georges River since the early 1990s. Contrary to our
expectations, we also found significantly higher levels of genetic
diversity and heterozygosity in the selectively bred population relative
to the wild population. The relatively low level of genetic diversity that
we detected in wild oysters may be particularly relevant to the adaptive
capacity of this species in the wild.
Final filtered SNP data for Saccostrea glomerataSNP data for 90 oysters at
1200 loci, provided in GenAlEx format (0=Missing data, 1=Reference allele,
2=SNP allele) in an Excel file. Population codes match those used in the
text of the corresponding published manuscript.SNP_data_M12109.xlsx
Georges River Australia