Abstract
Phylogeographically
structured
lineages
are
a
common
outcome
of
range-wide
population
genetic
studies.
In
the
southeastern
United
States,
disconnection
between
populations
found
at
intersection
coastal
plains
peninsular
Florida
and
adjacent
continent
is
readily
apparent
among
many
plants
animals.
However,
timing
maintenance
species
boundaries
these
distinctly
different
subtropical
temperate
regions
remains
unknown
for
all
organisms
studied
there.
Using
genome-scale
data,
we
examine
origins,
gene
flow,
movement
genes
under
selection
in
unique
ecoregions
within
North
American
racers
(
Coluber
constrictor
).
Isolation-migration
models
along
with
tests
genome-wide
selection,
locus-environment
associations,
spatial
genomic
clines
demonstrate
that
two
unrecognized
present
contact
boundary
ecoregions.
We
show
several
loci
associated
environments
have
maintained
despite
constant
levels
flow
over
thousands
generations.
This
research
provides
new
avenue
to
speciation
processes
poorly
biodiversity
hotspots.
bioRxiv (Cold Spring Harbor Laboratory),
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 5, 2024
Most
of
our
understanding
the
fundamental
processes
mutation
and
recombination
stems
from
a
handful
disparate
model
organisms
pedigree
studies
mammals,
with
little
known
about
other
vertebrates.
To
gain
broader
comparative
perspective,
we
focused
on
zebra
finch
(
Abstract
Background
Primary
transcripts
are
largely
comprised
of
intronic
sequences
that
excised
and
discarded
shortly
after
synthesis.
In
vertebrates,
the
shape
intron
size
distribution
is
constant;
however,
most
teleost
fish
have
a
diverged
log-bimodal
‘teleost
distribution’
(TD)
seen
only
in
teleosts.
How
TD
evolved
to
what
extent
this
was
affected
by
adaptative
or
non-adaptive
mechanisms
unknown.
Results
Here,
we
show
has
independently
at
least
six
times
its
appearance
linked
loss
aKRAB
domain
from
PRDM9.
We
determined
distributions
identified
PRDM9
orthologues
annotated
genomes
addition
scanning
1193
assemblies
for
domain.
form
(
$$\beta$$
β
)
predominant
teleosts
whereas
$$\alpha$$
α
version
absent
species.
Only
subset
PRDM9-
proteins
contain
aKRAB,
hence,
it
present
small
number
lineages.
Almost
all
lineages
lacking
(but
no
species
with)
had
TDs.
Conclusions
mammals,
defines
sites
meiotic
recombination
through
mechanism
increases
structural
variance
depends
on
aKRAB.
The
likely
shifted
locations
both
hotspots.
Our
observations
suggest
as
side-effect
these
changes
link
evolution
illustrating
how
genome
architectures
can
evolve
absence
selection.
Abstract
Phylogeographically
structured
lineages
are
a
common
outcome
of
range-wide
population
genetic
studies.
In
the
southeastern
United
States,
disconnection
between
populations
found
at
intersection
coastal
plains
peninsular
Florida
and
adjacent
continent
is
readily
apparent
among
many
plants
animals.
However,
timing
maintenance
species
boundaries
these
distinctly
different
subtropical
temperate
regions
remains
unknown
for
all
organisms
studied
there.
Using
genome-scale
data,
we
examine
origins,
gene
flow,
movement
genes
under
selection
in
unique
ecoregions
within
North
American
racers
(
Coluber
constrictor
).
Isolation-migration
models
along
with
tests
genome-wide
selection,
locus-environment
associations,
spatial
genomic
clines
demonstrate
that
two
unrecognized
present
contact
boundary
ecoregions.
We
show
several
loci
associated
environments
have
maintained
despite
constant
levels
flow
over
thousands
generations.
This
research
provides
new
avenue
to
speciation
processes
poorly
biodiversity
hotspots.
