Research Square (Research Square),
Journal Year:
2022,
Volume and Issue:
unknown
Published: Nov. 21, 2022
Abstract
Vertebrates
show
diversity
in
their
sex
determining
systems.
The
main
reasons
to
explain
why
a
species
shows
specific
system
is
yet
unclear.
Charnov-Bull
model
predicts
that
temperature-dependent
(TSD)
evolve
when
there
differential
fitness
between
sexes,
linking
the
determination
different
environmental
temperatures.
Here,
I
observed
TSD
tend
breed
inside
range
allows
them
produce
both
males
and
females.
Contrary,
close
where
controlled
by
genotypic
mechanisms
(GSD)
outside
these
ranges,
suggesting
possible
complete
bias
if
they
had
also
do
not
find
support
for
thermal
adaptation
25
reptile
belonging
three
phylogenetic
orders.
Finally,
test
scenarios
confirm
able
transitions
from
chromosomes
systems
has
never
been
neither
mammals
nor
birds.
Molecular Ecology,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 10, 2024
ABSTRACT
Alternative
reproductive
tactics
are
discrete,
intrasexual
differences
in
behaviour
within
a
population.
In
some
cases,
these
complex
phenotypes
determined
by
autosomal
supergenes
or
sex
chromosomes—both
of
which
exhibit
reduced
recombination
and
thus
enable
the
linked
inheritance
co‐adapted
alleles
from
multiple
loci.
Most
alternative
amphibians
plastic
(and
reversible),
environmentally
lacking
morphological
differentiation,
but
striking
exception
is
found
two‐lined
salamander
(
Eurycea
bislineata
)
species
complex.
populations,
two
distinct
male
coexist:
‘searching’
males
have
mental
glands,
protruding
premaxillary
teeth
elongate
cirri
used
terrestrial
courtship,
while
‘guarding’
lack
traits
instead
hypertrophied
jaw
musculature
mate
guarding
at
aquatic
nesting
sites.
These
differ
many
behavioural
phenotypes,
their
proximate
cause
has
not
yet
been
described.
Here,
we
generated
genome‐wide
SNP
data
>
130
cf.
wilderae
collected
Highlands
Biological
Station.
We
provide
evidence
for
an
XY
determination
Y‐linked
polymorphism
underlying
this
then
develop
validate
PCR‐based
genotyping
assay
apply
it
to
characterise
ratio
relative
frequency
sample
larvae.
Our
results
add
growing
body
literature
exploring
importance
chromosomes
intraspecific
polymorphisms,
highlight
opportunities
future
work
continue
genomic
architecture
traits.
Research Square (Research Square),
Journal Year:
2023,
Volume and Issue:
unknown
Published: March 21, 2023
Abstract
Using
recently
published
chromosome-length
genome
assemblies
of
damselfly
species
Ischnura
elegans
and
Platycnemis
pennipes
dragonfly
Pantala
flavescens
Tanypteryx
hageni
,
we
demonstrate
that
the
autosomes
Odonata
show
a
high
level
conservation,
despite
250
million
years
separation.
In
four
genomes
discussed
here,
our
results
all
have
clear
homolog
to
ancestral
karyotype.
Despite
synteny,
different
factors,
including
concentration
repeat
dynamics,
GC
content,
relative
proportion
coding
sequence
influence
amount
synteny
across
chromosomes,
these
factors
differ
among
species.
Micro-
sex
chromosomes
in
do
not
share
same
as
autosomes.
Of
sampled,
Black
Petaltail,
which
diverged
from
its
sister
70
ago,
is
outlier,
showing
similarities
other
long-lived
lineages.
Research Square (Research Square),
Journal Year:
2022,
Volume and Issue:
unknown
Published: Nov. 21, 2022
Abstract
Vertebrates
show
diversity
in
their
sex
determining
systems.
The
main
reasons
to
explain
why
a
species
shows
specific
system
is
yet
unclear.
Charnov-Bull
model
predicts
that
temperature-dependent
(TSD)
evolve
when
there
differential
fitness
between
sexes,
linking
the
determination
different
environmental
temperatures.
Here,
I
observed
TSD
tend
breed
inside
range
allows
them
produce
both
males
and
females.
Contrary,
close
where
controlled
by
genotypic
mechanisms
(GSD)
outside
these
ranges,
suggesting
possible
complete
bias
if
they
had
also
do
not
find
support
for
thermal
adaptation
25
reptile
belonging
three
phylogenetic
orders.
Finally,
test
scenarios
confirm
able
transitions
from
chromosomes
systems
has
never
been
neither
mammals
nor
birds.
