bioRxiv (Cold Spring Harbor Laboratory),
Journal Year:
2023,
Volume and Issue:
unknown
Published: Sept. 6, 2023
Abstract
Island
organisms
often
evolve
phenotypes
divergent
from
their
mainland
counterparts,
providing
a
useful
system
for
studying
adaption
under
differential
selection.
Some
island
birds
have
melanic
plumage
differing
the
color
of
conspecifics,
trait
proposed
as
an
insular
adaptation.
In
white-winged
fairywren
(
Malurus
leucopterus
),
subspecies
on
two
islands
black
nuptial
whereas
Australian
has
blue
plumage.
The
feather
nanostructure
that
could
produce
structural
color,
suggesting
ancestor.
An
earlier
study
independent
evolution
melanism
based
history
divergence.
However,
genetic
basis
and
origin
differentiation
in
this
group
are
still
unknown.
Here,
we
used
whole-genomes
to
investigate
by
comparing
M.
identify
highly
genomic
regions.
We
identified
well-known
pigmentation
gene
ASIP
four
candidate
genes
may
contribute
development.
also
detected
signatures
selective
sweep
regions
containing
SCUBE2
not
subspecies,
predicted
work,
but
which
possesses
many
derived
SNPs
these
regions,
re-evolved
This
re-evolution
was
likely
driven
pre-existing
female
preference.
Our
findings
provide
new
insight
into
coloration
versus
continental
populations,
and,
importantly,
play
roles
development
coloration.
The American Naturalist,
Journal Year:
2024,
Volume and Issue:
204(5), P. 517 - 532
Published: July 15, 2024
AbstractHormones
mediate
sexual
dimorphism
by
regulating
sex-specific
patterns
of
gene
expression,
but
it
is
unclear
how
much
this
regulation
involves
hormone
levels
versus
transcriptomic
responses
to
the
same
hormonal
signal.
Moreover,
hormones
can
evolve,
extent
which
pleiotropy
in
conserved
across
closely
related
species
not
well
understood.
We
addressed
these
issues
elevating
testosterone
juvenile
females
and
males
three
Molecular Biology and Evolution,
Journal Year:
2024,
Volume and Issue:
41(3)
Published: Feb. 28, 2024
Abstract
Island
organisms
often
evolve
phenotypes
divergent
from
their
mainland
counterparts,
providing
a
useful
system
for
studying
adaptation
under
differential
selection.
In
the
white-winged
fairywren
(Malurus
leucopterus),
subspecies
on
two
islands
have
black
nuptial
plumage
whereas
Australian
has
blue
plumage.
The
feather
nanostructure
that
could
in
principle
produce
structural
color,
suggesting
ancestor.
An
earlier
study
proposed
independent
evolution
of
melanism
based
history
divergence.
However,
genetic
basis
and
origin
color
differentiation
this
group
are
still
unknown.
Here,
we
used
whole-genome
resequencing
to
investigate
by
comparing
M.
leucopterus
identify
highly
genomic
regions.
We
identified
well-known
pigmentation
gene
ASIP
four
candidate
genes
may
contribute
development.
Contrary
prediction
convergent
island
melanism,
detected
signatures
selective
sweep
regions
containing
SCUBE2
not
but
subspecies,
which
possesses
many
derived
SNPs
these
regions,
re-evolved
This
re-evolution
was
likely
driven
preexisting
female
preference.
Our
findings
provide
new
insight
into
coloration
versus
continental
populations,
and,
importantly,
play
roles
development
coloration.
bioRxiv (Cold Spring Harbor Laboratory),
Journal Year:
2024,
Volume and Issue:
unknown
Published: Aug. 19, 2024
Abstract
Animal
communication
can
be
complex,
often
involving
multiple
static
and
dynamic
traits.
The
extent
to
which
these
traits
are
correlated
elucidate
their
function
as
either
redundant
or
messages.
Using
the
agamid
lizard,
Psammophilus
dorsalis
,
a
model
system
we
examined
patterns
of
trait
expression
role
steroid
hormones
in
mediating
during
social
interactions.
We
staged
male-male
interactions
lab
measured
repertoire
display
behaviour
colours,
change
dynamically
visible
ultraviolet
ranges
different
body
regions.
Additionally,
testosterone
corticosterone
levels
before
after
trials.
Our
results
show
that
within
colour
categories,
components
were
strongly
individuals,
suggesting
shared
physiological
pathway
information
content.
However,
across
correlation
varied.
chromatic
contrast
(yellow)
dorsal
region
lizards
was
with
both
size
level
aggression,
whereas
UV
patches
only.
also
found
negative
association
between
baseline
levels,
yellow
contrast,
mechanistic
link
interaction
induced
uncorrelated
behavioural
displays
itself.
Notably,
intensity
males
matched
by
opponents.
Overall,
our
suggest
signalling
ensure
redundancy
well
provide
messages
receivers,
thus
improving
robustness
transfer,
particularly
competitions
have
high
fitness
consequences.
Biological Journal of the Linnean Society,
Journal Year:
2023,
Volume and Issue:
143(1)
Published: Oct. 13, 2023
Abstract
Signals
conveyed
by
ornaments
can
be
indicators
in
the
process
of
sexual
selection.
Specifically,
signals
may
superimposed
on
each
other
to
represent
an
individual’s
quality,
convey
different
information,
or
offer
redundant
information.
As
much
research
this
area
has
focused
relationships
between
diverse
males,
those
females
have
largely
been
overlooked.
From
2022
2023,
we
tested
whether
three
traits,
namely
acoustic
(song
display)
and
visual
(patch
size
carotenoid-based
plumage
coloration),
morphology
(wing
tail
length),
were
interrelated
males
a
wild
population
varied
tits
(Sittiparus
varius).
We
found
that
with
brighter
more
reddish
sang
at
lower
maximum
minimum
frequencies,
narrower
bandwidths
frequency
peaks.
Similarly,
negative
correlation
length
coloration
was
observed
both
sexes.
Furthermore,
positive
relationship
within
traits.
These
results
highlight
trade-offs
as
well
consistency
same
bioRxiv (Cold Spring Harbor Laboratory),
Journal Year:
2024,
Volume and Issue:
unknown
Published: June 18, 2024
Abstract
Carotenoid
pigmentation
produces
the
yellow
and
red
coloration
of
birds
other
vertebrates,
but
our
understanding
genetic
architecture
carotenoid
ornamentation
is
largely
limited
to
studies
novel
color
variants
observed
in
captively
bred
populations.
The
complexity
carotenoid-based
evolution
nature
remains
poorly
characterized.
Here,
we
examine
long-tailed
finch
Poephila
acuticauda
,
an
Australian
songbird
with
two
hybridizing
subspecies
that
differ
bill
coloration:
western
eastern
hecki
.
We
characterize
composition
each
find
bills
can
be
explained
by
loss
C(4)-oxidation,
thus
blocking
dietary
pigments
from
being
metabolized
red.
Combining
linked-read
genomic
sequencing
reflectance
spectrophotometry
measurements
collected
wild-sampled
finches
laboratory
crosses,
identify
four
loci
together
explain
53%
variance
this
trait.
largest
effect
contain
genes
CYP2J19
essential
enzyme
for
ketolation
via
C(4)-oxidation
carotenoids,
TTC39B
enhancer
ketocarotenoid
production.
Evolutionary
genealogy
reconstruction
indicates
red-billed
phenotype
ancestral
alleles
at
both
arose
fixed
approximately
100
kya.
Yellow
then
introgressed
into
less
than
5
Across
all
loci,
derived
show
evidence
selective
sweeps,
implying
has
been
favored
natural
selection.
Our
study
suggests
frequent
adaptive
evolutionary
transitions
between
have
a
simple
basis.
Significance
studied
variation
color:
one
identified
single
metabolic
process,
underlying
distinct
these
colors.
Genetic
association
mapping
revealed
major
most
trait,
including
oxidative
gene
are
derived,
ancient
(~100
kya),
under
positive
This
driven
their
recent
(<5
kya)
introgression
across
hybrid
zone.
These
findings
important
implications
role
selection
phenotypic
systems.