bioRxiv (Cold Spring Harbor Laboratory),
Journal Year:
2023,
Volume and Issue:
unknown
Published: March 21, 2023
Molluscs
are
one
of
the
most
morphologically
diverse
clades
metazoans,
exhibiting
an
immense
diversification
calcium
carbonate
structures,
such
as
shell.
Biomineralization
calcified
shell
is
dependent
on
matrix
proteins
(SMPs).
While
SMP
diversity
hypothesized
to
drive
molluscan
diversity,
we
just
starting
unravel
evolutionary
history
and
biology.
Here
leveraged
two
complementary
model
mollusc
systems,
Crepidula
fornicata
atrasolea
,
determine
lineage-specificity
185
SMPs.
We
found
that
95%
adult
C.
proteome
belongs
conserved
metazoan
orthogroups,
with
molluscan-restricted
orthogroups
containing
half
all
SMPs
in
proteome.
The
low
number
-restricted
contradicts
generally-held
notion
animal’s
biomineralization
toolkit
dominated
by
mostly
novel
genes.
Next,
selected
a
subset
lineage-restricted
for
spatial-temporal
analysis
using
situ
hybridization
chain
reaction
(HCR)
during
larval
stages
.
12
out
18
analyzed
expressed
field.
Notably,
these
genes
present
5
expression
patterns,
which
define
at
least
three
distinct
cell
populations
within
These
results
represent
comprehensive
gastropod
age
field
patterns
date.
Collectively,
data
lay
foundation
future
work
interrogate
molecular
mechanisms
fate
decisions
underlying
mantle
specification
diversification.
Frontiers in Genetics,
Journal Year:
2022,
Volume and Issue:
13
Published: Nov. 2, 2022
Major
progress
has
been
made
with
genomic
and
genetic
studies
in
aquaculture
the
last
decade.
However,
research
on
epigenetic
regulation
of
traits
is
still
at
an
early
stage.
It
apparent
that
most,
if
not
all,
are
regulated
both
levels.
This
paper
reviews
recent
understanding
important
such
as
growth,
reproduction,
disease
resistance,
stress
responses.
Although
it
challenging
to
make
generalized
statements,
DNA
methylation
mostly
correlated
down-regulation
gene
expression,
especially
when
promoters
enhancers.
As
such,
growth
factors
their
receptors
negatively
growth;
hypomethylation
genes
for
tolerance
increased
tolerance;
male
or
female
sex
differentiation
leads
into
males
females,
respectively.
environmental
mediated
level
regulation,
environment-induced
changes
appeared
be
intergenerationally
inherited,
but
evidences
transgenerational
inheritance
limited.
Evolutionary Applications,
Journal Year:
2025,
Volume and Issue:
18(4)
Published: April 1, 2025
ABSTRACT
The
Kumamoto
oyster,
Crassostrea
sikamea
,
is
a
marine
bivalve
naturally
distributed
along
the
coasts
of
southern
China
and
Japan,
with
hatchery
population
that
has
been
under
domestication
in
United
States
since
its
introduction
from
Japan
1940s.
To
understand
evolutionary
history
environmental
adaptation,
we
produced
chromosome‐level
genome
assembly
C.
conducted
whole‐genome
resequencing
141
individuals
US
six
wild
populations
Japan.
assembled
size
616
Mb
covering
all
10
chromosomes
contig
N50
4.21
scaffold
62.25
Mb.
Phylogenetic
analysis
indicated
diverged
angulata
gigas
clade
about
9.9
million
years
ago.
Synteny
revealed
significant
chromosomal
rearrangements
during
evolution
leading
to
oysters,
but
remarkable
conservation
oyster
over
~180
years,
surprising
disparity
evolution.
three
distinct
clusters
for
US,
Japanese,
Chinese
populations,
closer
Japanese
population,
confirming
origin.
No
differentiation
was
detected
among
five
indicating
strong
gene
flow.
Between
402
genes
exhibited
selection
signals,
including
myosin
heavy
chain
were
also
differentiated
domesticated
lines
eastern
suggesting
changes
these
may
be
important
domestic
production.
Among
768
showing
signals
between
natural
China,
related
stress
response
are
most
enriched,
responding
critical
local
adaptation.
These
findings
provide
insights
into
as
well
useful
resources
comparative
genomics
genetic
improvement
cultured
stocks.
Science Advances,
Journal Year:
2023,
Volume and Issue:
9(31)
Published: Aug. 2, 2023
Pelagic
larval
stages
are
widespread
across
animals,
yet
it
is
unclear
whether
larvae
were
present
in
the
last
common
ancestor
of
animals
or
they
evolved
multiple
times
due
to
selective
pressures.
Many
marine
at
least
superficially
similar;
small,
swim
through
beating
bands
cilia,
and
sense
environment
with
an
apical
organ.
To
understand
these
similarities,
we
have
generated
single-cell
atlases
for
from
two
animal
phyla
compared
their
cell
types.
We
found
clear
similarities
among
ciliary
band
cells
between
neurons
organ
pointing
possible
homology
structures,
suggesting
a
single
origin
within
Spiralia.
also
find
several
clade-specific
innovations
each
larva,
including
distinct
myocytes
shell
gland
oyster
larva.
Oyster
express
many
recently
genes
that
made
previous
gene
age
estimates
trochophore
too
young.
PLoS ONE,
Journal Year:
2025,
Volume and Issue:
20(4), P. e0319165 - e0319165
Published: April 29, 2025
The
degradation
of
marine
plastic
debris
poses
a
threat
to
organisms
by
fragmenting
into
micro-
and
nano-scale
pieces
releasing
complex
chemical
leachate
the
water.
Numerous
studies
have
investigated
harms
from
pollution
such
as
microplastic
ingestion
exposure
single
chemicals.
However,
few
examined
holistic
synergistic
impacts
mixtures.
objective
this
study
was
measure
changes
in
gene
expression
gill
gonadal
tissue
eastern
oyster
(
Crassostrea
virginica
)
response
during
their
first
year,
using
RNA-seq
explore
multiple
types
physiological
responses.
Shell
polyethylene
terephthalate
were
used
substrate
for
metamorphosis
larval
oysters
settlement
tank.
Substrate
then
transferred
metal
cages
outplanted
pairs
–
shell
cage
onto
restoration
reefs
St.
Mary’s
River,
Maryland,
USA.
After
10
months
growth,
collected,
removed,
sex
identified.
tissues
six
each
type
analyzed
RNA-seq.
Both
samples
had
altered
immune
stress-response
genes
exposure.
Genes
upregulated
enriched
ontology
functions
proteolysis
fibrinolysis.
Downregulated
involved
biomineralization
growth.
One
male
exposed
“feminized”
patterns
despite
developing
mature
sperm,
suggesting
can
alter
shift
protandric
individuals
develop
females.
Plastic
may
therefore
reduce
initiate
stress
responses,
differentiation,
impact
reproductive
output
through
transcription.
Reviews in Aquaculture,
Journal Year:
2024,
Volume and Issue:
17(1)
Published: Aug. 28, 2024
ABSTRACT
Bivalves
possess
a
pair
of
valves
connected
to
stretchable
ligament
that
facilitates
the
opening
and
closing
shell.
The
growth
bioprocess
commences
when
supplemental
materials
secreted
from
edge
are
added
early‐constructed
Here,
we
endeavor
provide
glimpse
into
physiological
responses,
mechanistic
control,
omics
applications
toward
understanding
this
complex
trait.
In
first
section,
review
studies
have
been
performed
investigate
effects
food
availability,
temperature,
salinity,
contaminants,
climate
change
in
natural
ecosystems
under
experimental
conditions.
These
conditions
affect
some
internal
promotors
alter
concentration
particular
neuropeptides
neurotransmitters
induce
neuroendocrinal
signals
crucial
for
regulating
peculiar
process.
Besides,
predicted
concept
organs'
size
control
maintaining
body
homeostasis
via
intertwining
networks,
including
Hippo
pathway.
On
other
hand,
discuss
findings
employing
genomics,
transcriptomics,
proteomics,
metabolomics
approaches
uncover
modulation
growth‐related
traits
different
bivalve
species.
We
recommend
further
research
decipher
organ
its
intricate
relationship
with
entire
homeostasis.
Future
genetic
dissection
also
recommended
identify
new
key
genes
major
effect
profoundly
influences
trait,
facilitating
their
potential
editing
develop
strains
enhanced
rates.
Frontiers in Immunology,
Journal Year:
2022,
Volume and Issue:
13
Published: Aug. 19, 2022
The
Ostreid
herpesvirus
1
(OsHV-1)
is
a
lethal
pathogen
of
the
Pacific
oyster
(Crassostrea
gigas),
an
important
aquaculture
species.
To
understand
genetic
architecture
defense
against
pathogen,
we
studied
genomic
variations
associated
with
herpesvirus-caused
mortalities
by
pooled
whole-genome
resequencing
before
and
after-mortality
larval
samples
as
well
dead
surviving
adults
from
viral
challenge.
Analysis
data
identified
5,271
SNPs
1,883
regions
covering
3,111
genes
in
larvae,
18,692
28,314
4,863
that
were
significantly
mortalities.
Only
1,653
implicated
shared
larvae
adults,
suggesting
antiviral
response
or
resistance
involves
different
sets
differentiated
members
expanded
gene
families.
Combined
analyses
previous
transcriptomic
challenge
experiments
revealed
transcription
many
mortality-associated
was
also
upregulated
infection
confirming
their
importance
response.
Key
immune
especially
those
encoding
receptors
such
TLRs
RLRs
displayed
strong
association
between
variation
regulatory
region
mortality,
they
may
confer
through
transcriptional
modulation.
These
results
point
to
previously
undescribed
mechanisms
for
disease
at
developmental
stages
provide
candidate
polymorphisms
are
valuable
understanding
responses
breeding
resistance.