Philosophical Transactions of the Royal Society B Biological Sciences,
Год журнала:
2021,
Номер
376(1825), С. 20200161 - 20200161
Опубликована: Апрель 4, 2021
The
extraordinary
diversity
in
molluscan
body
plans,
and
the
genomic
mechanisms
that
enable
it,
remains
one
of
great
questions
evolution.
eight
distinct
living
taxonomic
classes
molluscs
are
each
unambiguously
monophyletic;
however,
significant
controversy
about
phylogenetic
relationships
among
those
branches.
Molluscs
second-largest
animal
phylum,
with
over
100
000
species
broad
biological,
economic
medical
interest.
To
date,
only
around
53
genome
assemblies
have
been
accessioned
to
NCBI
GenBank
covering
four
classes.
Furthermore,
taxa
where
partial
or
whole-genome
available
often
aberrantly
fast
evolving
recently
derived
lineages.
Characteristic
adaptations
provide
interesting
targets
for
projects,
animals
like
scaly-foot
snail
octopus,
but
without
basal-branching
lineages
comparison,
context
features
cannot
be
assessed.
currently
genomes
also
create
a
non-optimal
set
resolving
deeper
branches:
they
small
sample
representing
large
group,
come
primarily
from
rarefied
pool.
Thoughtful
selection
future
projects
should
focus
on
blank
areas
tree,
which
ripe
opportunities
delve
into
peculiarities
evolution,
reveal
biology
evolutionary
history
molluscs.
This
article
is
part
Theo
Murphy
meeting
issue
‘Molluscan
genomics:
insights
directions
neglected
phylum’.
Nature Communications,
Год журнала:
2022,
Номер
13(1)
Опубликована: Май 4, 2022
Abstract
Cephalopods
are
known
for
their
large
nervous
systems,
complex
behaviors
and
morphological
innovations.
To
investigate
the
genomic
underpinnings
of
these
features,
we
assembled
chromosomes
Boston
market
squid,
Doryteuthis
(Loligo)
pealeii,
California
two-spot
octopus,
Octopus
bimaculoides
,
compared
them
with
those
Hawaiian
bobtail
Euprymna
scolopes
.
The
genomes
soft-bodied
(coleoid)
cephalopods
highly
rearranged
relative
to
other
extant
molluscs,
indicating
an
intense,
early
burst
genome
restructuring.
coleoid
feature
multi-megabase,
tandem
arrays
genes
associated
brain
development
cephalopod-specific
We
find
that
a
hallmark,
extensive
A-to-I
mRNA
editing,
displays
two
fundamentally
distinct
patterns:
one
exclusive
system
concentrated
in
genic
sequences,
widespread
directed
toward
repetitive
elements.
conclude
novelty
is
mediated
part
by
substantial
reorganization,
gene
family
expansion,
tissue-dependent
editing.
Communications Biology,
Год журнала:
2025,
Номер
8(1)
Опубликована: Янв. 4, 2025
Abstract
Symbioses
are
major
drivers
of
organismal
diversification
and
phenotypic
innovation.
However,
how
long-term
symbioses
shape
whole
genome
evolution
in
metazoans
is
still
underexplored.
Here,
we
use
a
giant
clam
(
Tridacna
maxima
)
to
demonstrate
symbiosis
has
left
complex
signatures
an
animal’s
genome.
Giant
clams
thrive
oligotrophic
waters
by
forming
remarkable
association
with
photosymbiotic
dinoflagellate
algae.
Genome-based
demographic
inferences
uncover
tight
correlation
between
T.
global
population
change
paleoclimate
habitat
shifts,
revealing
abiotic
biotic
factors
may
dictate
microevolution.
Comparative
analyses
reveal
genomic
features
that
be
symbiosis-driven,
including
expansion
contraction
immunity-related
gene
families
large
proportion
lineage-specific
genes.
Strikingly,
about
70%
the
composed
repetitive
elements,
especially
transposable
most
likely
resulting
from
symbiosis-adapted
immune
system.
This
work
greatly
enhances
our
understanding
underlie
metazoan
diversification.
Communications Biology,
Год журнала:
2019,
Номер
2(1)
Опубликована: Дек. 11, 2019
Abstract
Bobtail
squid
are
emerging
models
for
host–microbe
interactions,
behavior,
and
development,
yet
their
species
diversity
distribution
remain
poorly
characterized.
Here,
we
combine
mitochondrial
transcriptome
sequences
with
morphological
analysis
to
describe
three
of
bobtail
(Sepiolidae:
Sepiolinae)
from
the
Ryukyu
archipelago,
compare
them
related
taxa.
One
Ryukyuan
type
was
previously
unknown,
is
described
here
as
Euprymna
brenneri
sp.
nov.
Another
morphologically
indistinguishable
Sepiola
parva
Sasaki,
1913.
Molecular
analyses,
however,
place
this
taxon
within
genus
Steenstrup,
1887,
additional
investigation
led
formal
rediagnosis
reassignment
comb.
While
no
adults
third
were
found,
hatchlings
suggest
a
close
relationship
E.
pardalota
Reid,
2011,
known
Australia
East
Timor.
The
broadly
sampled
transcriptomes
reported
provide
foundation
future
phylogenetic
comparative
studies.
Abstract
The
common
octopus,
Octopus
vulgaris
,
is
an
active
marine
predator
known
for
the
richness
and
plasticity
of
its
behavioral
repertoire,
remarkable
learning
memory
capabilities.
other
coleoid
cephalopods,
cuttlefish
squid,
possess
largest
nervous
system
among
invertebrates,
both
cell
counts
body
to
brain
size.
O
.
has
been
at
center
a
long-tradition
research
into
diverse
aspects
biology.
To
leverage
in
this
iconic
species,
we
generated
270
Gb
genomic
sequencing
data,
complementing
those
available
only
sequenced
congeneric
bimaculoides
We
show
that
genomes
are
similar
size,
but
display
different
levels
heterozygosity
repeats.
Our
data
give
first
quantitative
glimpse
rate
coding
non-coding
regions
support
view
hundreds
novel
genes
may
have
arisen
independently
despite
close
phylogenetic
distance.
furthermore
describe
reference-guided
assembly
open
resource
(CephRes-gdatabase),
opening
new
avenues
study
novelties
cephalopods
their
