Reproductive
isolating
barriers
are
a
crucial
element
in
the
speciation
process.
There
various
types
of
barriers,
and
within
those
that
act
early
process,
behavioral
one
can
play
an
important
role
populations
or
closely
related
species.
It
has
been
shown
high
diversity
some
taxa
correlates
with
variation
sexual
signals,
which
facilitate
isolation.
Here
it
is
explored
whether
chemical
signals
may
contribute
to
Liolaemus
lizards,
more
than
290
Population
discrimination
was
investigated
two
co-distributed
species,
L.
tenuis
lemniscatus.
The
studied
were
located
likely
belonged
same
genetic
lineages.
Lizards
both
species
discriminated
between
scents
their
own
different
populations,
most
cases,
from
population
preferred.
Results
suggest
fast
evolution
scents,
recognition,
there
for
ethological
associated
modality
evolve
fast.
However,
because
differed
strength
exhibited
discrimination,
at
rates
across
be
concluded
involving
disrupt
species'
cohesion,
contributing
diversification,
synergy
not
geographical
barriers.
New Phytologist,
Journal Year:
2022,
Volume and Issue:
237(2), P. 656 - 671
Published: Oct. 10, 2022
Summary
Biodiversity
hotspots,
such
as
the
Caucasus
mountains,
provide
unprecedented
opportunities
for
understanding
evolutionary
processes
that
shape
species
diversity
and
richness.
Therefore,
we
investigated
evolution
of
Primula
sect.
,
a
clade
with
high
degree
endemism
in
Caucasus.
We
performed
phylogenetic
network
analyses
whole‐genome
resequencing
data
from
entire
nuclear
genome,
chloroplast
heterostyly
supergene.
The
different
characteristics
genomic
partitions
resulting
incongruences
enabled
us
to
disentangle
histories
tokogenetic
vs
cladogenetic
processes.
first
phylogeny
inferred
supergene
includes
all
.
Our
results
identified
recurrent
admixture
at
deep
nodes
between
lineages
cause
non‐monophyly
Biogeographic
support
‘out‐of‐the‐Caucasus’
hypothesis,
emphasizing
importance
this
hotspot
cradle
biodiversity.
findings
novel
insights
into
causal
discordance,
demonstrating
genome‐wide
contrasting
genetic
broad
geographic
sampling
are
crucial
disentangling
diversification
species‐rich
clades
biodiversity
hotspots.
Systematic Biology,
Journal Year:
2023,
Volume and Issue:
72(4), P. 739 - 752
Published: April 25, 2023
In
this
study
we
detangled
the
evolutionary
history
of
Patagonian
lizard
clade
Liolaemus
kingii,
coupling
dense
geographic
sampling
and
novel
computational
analytical
approaches.
We
analyzed
nuclear
mitochondrial
data
(restriction
site-associated
DNA
sequencing
cytochrome
b)
to
hypothesize
evaluate
species
limits,
phylogenetic
relationships,
demographic
histories.
complemented
these
analyses
with
posterior
predictive
simulations
assess
fit
genomic
multispecies
coalescent
model.
also
employed
a
approach
time-calibrate
network.
Our
results
show
several
instances
mito-nuclear
discordance
consistent
support
for
reticulated
history,
supporting
view
that
complex
kingii
is
characterized
by
extensive
gene
flow
rapid
diversification
events.
discuss
our
findings
in
contexts
"gray
zone"
speciation,
phylogeographic
patterns
region,
taxonomic
outcomes.
[Model
adequacy;
coalescent;
network
phylogenomics;
delimitation.].
Ecology and Evolution,
Journal Year:
2022,
Volume and Issue:
12(8)
Published: Aug. 1, 2022
Abstract
Recovering
phylogenetic
relationships
in
lineages
experiencing
intense
diversification
has
always
been
a
persistent
challenge
evolutionary
studies,
including
Gentiana
section
Chondrophyllae
sensu
lato
(s.l.).
Indeed,
this
subcosmopolitan
taxon
encompasses
more
than
180
mostly
annual
species
distributed
around
the
world.
We
sequenced
and
assembled
22
new
plastomes
representing
21
s.l.
In
addition
to
previously
released
plastome
data,
our
study
includes
all
main
within
section.
reconstructed
their
based
on
protein‐coding
genes
recombinant
DNA
(rDNA)
cistron
sequences,
then
investigated
structural
evolution
as
well
divergence
time.
Despite
an
admittedly
humble
cover
overall,
we
recovered
well‐supported
tree
found
significant
discordance
between
taxonomic
treatments.
Our
results
show
that
G.
capitata
leucomelaena
diverged
early
section,
which
is
further
divided
into
two
clades.
The
time
estimation
showed
evolved
second
half
of
Oligocene.
had
smallest
average
size
(128
KB)
tribe
Gentianeae
(Gentianaceae),
with
frequent
gene
sequence
losses
such
ndh
complex
its
flanking
regions.
addition,
detected
both
expansion
contraction
inverted
repeat
(IR)
suggests
degradation
parallels
group,
illustrates
strong
treatments,
now
need
be
carefully
revised.
Molecular Ecology,
Journal Year:
2024,
Volume and Issue:
34(2)
Published: Dec. 24, 2024
Adaptive
radiations
are
rich
laboratories
for
exploring,
testing,
and
understanding
key
theories
in
evolution
ecology
because
they
offer
spectacular
displays
of
speciation
ecological
adaptation.
Particular
challenges
to
the
study
adaptive
radiation
include
high
levels
species
richness,
rapid
speciation,
gene
flow
between
species.
Over
last
decade,
high-throughput
sequencing
technologies
access
population
genomic
data
have
lessened
these
by
enabling
analysis
samples
from
many
individual
organisms
at
whole-genome
scales.
Here
we
review
how
facilitated
our
knowledge
five
areas:
(1)
phylogenetics,
(2)
hybridization,
(3)
timing
rates
diversification,
(4)
basis
trait
evolution,
(5)
role
genome
structure
divergence.
We
current
each
area,
highlight
outstanding
questions,
focus
on
methods
that
facilitate
detection
complex
patterns
divergence
demography
populations
through
time.
It
is
clear
revolutionising
ability
reconstruct
evolutionary
history
rapidly
diversifying
clades.
Additionally,
studies
increasingly
emphasising
central
flow,
re-use
standing
genetic
variation
during
adaptation,
structural
elements
as
facilitators
process
radiations.
hybridization-and
hypothesized
processes
which
it
shapes
diversification-and
questions
seeking
bridge
divide
microevolutionary
macroevolutionary
areas
future
study.
Overall,
has
an
exciting
era
research,
with
implications
deeper
fundamental
across
tree
life.
Ecology and Evolution,
Journal Year:
2022,
Volume and Issue:
12(6)
Published: June 1, 2022
Abstract
Evolutionary
correlations
between
phenotypic
and
environmental
traits
characterize
adaptive
radiations.
However,
the
lizard
genus
Liolaemus
,
one
of
most
ecologically
diverse
terrestrial
vertebrate
radiations
on
earth,
has
so
far
shown
limited
or
mixed
evidence
diversification
in
phenotype.
Restricted
use
comprehensive
data,
incomplete
taxonomic
representation
not
considering
phylogenetic
uncertainty
may
have
led
to
contradictory
evidence.
We
compiled
a
26‐taxon
dataset
for
gracilis
species
group,
representing
much
ecological
diversity
represented
within
used
data
how
environments
occupied
by
species'
relate
evolution.
Our
analyses,
explicitly
accounting
uncertainty,
suggest
toward
present,
with
body
shape
evolution
rapidly
evolving
this
group.
Body
correlates
occupation
different
structural
habitats
indicated
vegetation
axes
suggesting
adapted
maximal
locomotory
performance
these
habitats.
results
also
imply
that
effects
model
misspecification
be
more
extensive
univariate,
relative
multivariate
analyses
evolutionary
correlations,
which
is
an
important
consideration
analyzing
from
radiating
bioRxiv (Cold Spring Harbor Laboratory),
Journal Year:
2022,
Volume and Issue:
unknown
Published: Nov. 14, 2022
ABSTRACT
Gene-flow
processes
such
as
hybridization
and
introgression
play
important
roles
in
shaping
diversity
across
the
tree
of
life.
Recent
studies
extending
birth-death
models
have
made
it
possible
to
investigate
patterns
reticulation
a
macroevolutionary
context.
These
allow
for
different
gene
flow
events
that
can
either
add,
maintain,
or
remove
lineages—with
itself
possibly
being
dependent
on
relatedness
between
species—thus
creating
complex
diversification
scenarios.
Further,
many
reticulate
phylogenetic
inference
methods
assume
specific
structures
phylogenies
belonging
certain
network
classes.
However,
distributions
networks
under
are
poorly
characterized,
is
unknown
whether
they
violate
common
methodological
assumptions.
We
use
simulation
techniques
explore
space
birth-death-hybridization
process
where
rate
linear
dependence
genetic
distance.
Specifically,
we
measured
number
lineages
through
time
role
along
with
proportion
belong
commonly
used
classes
(e.g.,
tree-child,
tree-based,
level-1
networks).
find
growth
class
membership
largely
affected
by
assumptions
about
flow.
In
accordance
previous
studies,
lower
belonged
these
based
type
density
events.
process,
factors
form
an
antagonistic
relationship;
cause
high
proportions
also
lead
highest
density,
consequently
lowering
overall
some
observed
distance–dependent
incomplete
sampling
increase
membership,
primarily
due
having
fewer
Our
results
inform
if
their
biological
expectations
associated
evolutionary
histories
satisfy
current
methodology
aid
finding
relevant
development.
Evolution,
Journal Year:
2024,
Volume and Issue:
78(5), P. 1018 - 1019
Published: March 11, 2024
Abstract
Recent
perspectives
on
speciation
genomics
emphasize
the
pivotal
role
of
hybridization
in
driving
rapid
radiations.
The
Liolaemus
lizard
genus
displays
impressive
species
richness
with
around
290
widely
distributed
across
southern
South
America.
Sánchez
et
al.
conducted
a
comprehensive
study
5-million-year-old
kingii
group,
which
includes
14
species.
research
provides
new
key
insights
to
enhance
our
understanding
this
radiation,
including
its
diversification
space
and
time
consequences
morphological
evolution
taxonomy.