Plants,
Год журнала:
2024,
Номер
13(7), С. 993 - 993
Опубликована: Март 30, 2024
Landmark-based
geometric
morphometrics
(GM)
was
used
to
examine,
for
the
first
time,
spontaneous
hybridization
between
Alnus
incana
(L.)
Moench
and
rohlenae
Vít,
Douda
Mandák,
assess
inter-
intrapopulation
variability
in
leaf
shape,
size
venation
natural
populations
Serbia
(Western
Balkans).
Two
geographically
distant
(30
km)
two
close
(1.2
were
selected
examine
hybridization.
The
shapes
assessed
by
canonical
variate
analysis
linear
discriminant
performed
on
symmetric
component
of
variation.
Covariation
shape
variation
number
pairs
secondary
veins
investigated
with
partial
least
squares
analysis.
Static
allometry
examined
time
genus
Mill.
A
higher
proportion
A.
leaves
classified
as
populations,
which
is
accordance
hypothesis
about
No
single
incana,
indicating
that
putative
hybrids
can
only
be
found
grey
alder
populations.
This
study
demonstrates
GM
a
powerful
tool
species
delimitation
hybrid
detection
it
preliminary
screening
zones.
Communications Biology,
Год журнала:
2025,
Номер
8(1)
Опубликована: Апрель 30, 2025
Cryptic
diversity
in
evolutionary
radiation
offers
an
excellent
system
for
investigating
the
intricacies
of
progress.
Understanding
evolution
cryptic
is
imperative
unraveling
hidden
complexities
biodiversity.
However,
empirical
evidence
elucidating
mechanisms
behind
remains
limited,
particularly
plants.
Here,
we
focus
on
a
monophyletic
group
Aquilegia
species
mainly
distributed
mountains
Southwest
China,
one
world's
biodiversity
hotspots.
Using
whole-genome
resequencing
158
individuals
from
23
natural
populations,
identify
three
to
four
paraphyletic
lineages
within
each
morphological
species.
Our
findings
reveal
that
39
out
43
detected
instances
introgression
occurred
post-lineage
formation.
Identifying
shared
genomic
regions
indicates
divergence
fixed
singletons
A.
kansuensis
and
rockii
predates
lineage
formation,
supporting
scenario
where
incomplete
sorting
standing
variation
contributes
parallelism.
Furthermore,
strong
positive
correlations
among
differentiation,
divergence,
suggest
variations
non-sister
contribute
rapid
genetic
divergence.
study
illuminates
important
roles
plant
radiation,
advancing
our
understanding
complex
recent
events.
Frontiers in Plant Science,
Год журнала:
2025,
Номер
16
Опубликована: Май 12, 2025
Polyploidization
is
not
only
an
important
driving
force
for
plant
speciation
and
evolution,
but
also
effective
approach
domestication
improvement.
Polyploid
taxa
are
quite
common
in
Paeonia
section
(herbaceous
peonies),
very
rare
Moutan
(tree
which
known
as
the
'king
of
flowers'.
In
this
paper,
we
studied
origination
a
tetraploid
tree
peony,
P.
×
lemoinei
'Golden
Era'
('GE',
AABB),
by
comparing
its
karyotype
with
seed
parent,
Isles'
('GI',
AB),
based
on
genomic
situ
hybridization
(GISH)
rDNA
fluorescence
(FISH).
The
meiosis
behaviors
'GI'
were
observed
to
make
clear
cytogenetic
process
unreduced
(2n)
gamete
generation.
Four
chromosomes
inter-genome
translocations
identified
'GE',
two
might
be
reciprocal
translocations.
2n
female
gametes
via
first
division
restitution
(FDR)
from
play
role
tetraploidization
'GE'.
distant
between
intersterile
species
different
subsections
probably
promotes
peonies
facilitating
production.
mechanism
highly
consistent
that
Paeonia,
inseparable
assist
mankind.
divergence
life
history
herbaceous
speculated
contribute
level
polyploidization,
distinct
tempo
genus
Paeonia.
These
findings
bring
new
insights
polyploid
breeding,
evolution
Heredity,
Год журнала:
2023,
Номер
131(5-6), С. 307 - 315
Опубликована: Окт. 27, 2023
An
interesting
conundrum
was
recently
revealed
by
R.
Abbott
when
he
found
that
the
number
of
hybrid
zones
reported
in
literature
for
plants
is
very
low,
given
propensity
to
hybridise.
In
another
survey
on
performed
over
period
1970-2022,
we
vertebrates
2.3
times
greater
than
vascular
plants,
even
though
there
are
about
six
more
plant
species
vertebrates.
Looking
at
papers
reporting
zones,
4.9
plants.
These
figures
support
relevance
this
conundrum.
paper
aim
shed
light
question
providing
a
structured
discussion
causes
may
underlie
We
propose
non-mutually
exclusive
factors,
namely
lack
or
deficit
spatial
structure,
genetic
effects
hybridisation
between
non-closely
related
species,
lability
time,
botanists'
perception
hybridisation,
and
population
data.
There
does
not
appear
be
single
factor
explains
our
puzzle,
which
applies
all
cases
where
detected
but
no
zone
reported.
It
argued
some
features
suggest
puzzle
not,
least
entirely,
due
insufficient
knowledge
specific
cases,
hypothesis
should
addressed
with
wider
range
empirical
data
across
different
taxonomic
groups.
Molecular Biology and Evolution,
Год журнала:
2024,
Номер
41(9)
Опубликована: Сен. 1, 2024
The
heterogeneous
landscape
of
genomic
variation
has
been
well
documented
in
population
studies.
However,
disentangling
the
intricate
interplay
evolutionary
forces
influencing
genetic
over
time
remains
challenging.
In
this
study,
we
assembled
a
chromosome-level
genome
for
Castanopsis
eyrei
and
sequenced
whole
genomes
276
individuals
from
12
species,
spanning
broad
divergence
continuum.
We
found
highly
correlated
landscapes
across
these
species.
Furthermore,
variations
diversity
differentiation
along
were
strongly
associated
with
recombination
rates
gene
density.
These
results
suggest
that
long-term
linked
selection
conserved
features
have
contributed
to
formation
common
landscape.
By
examining
how
correlations
between
summary
statistics
change
throughout
species
continuum,
determined
background
alone
does
not
fully
explain
observed
patterns
variation;
effects
recurrent
selective
sweeps
must
be
considered.
further
revealed
extensive
flow
significantly
influenced
estimated
admixture
proportion
positively
rate
negatively
density,
supporting
scenario
against
flow.
Additionally,
putative
introgression
regions
exhibited
strong
signals
positive
selection,
an
enrichment
functional
genes,
reduced
burdens,
indicating
adaptive
played
role
shaping
hybridizing
This
study
provides
insights
into
different
interacted
driving
evolution
Genes,
Год журнала:
2024,
Номер
15(4), С. 520 - 520
Опубликована: Апрель 21, 2024
DNA
damage
causes
the
mutations
that
are
principal
source
of
genetic
variation.
detection
and
repair
mechanisms
therefore
play
a
determining
role
in
generating
diversity
on
which
natural
selection
acts.
Speciation,
it
is
commonly
assumed,
occurs
at
rate
set
by
level
standing
allelic
population.
The
process
speciation
driven
combination
two
evolutionary
forces:
drift
ecological
selection.
Genetic
takes
place
under
conditions
relaxed
selection,
results
balance
between
rates
mutation
substitution.
These
processes,
necessarily
mediated
variety
guaranteeing
genome
stability
any
given
species.
One
outstanding
questions
biology
concerns
origin
widely
varying
phylogenetic
distribution
biodiversity
across
Tree
Life
how
forces
contribute
to
shaping
distribution.
following
examines
some
molecular
underlying
adaptive
radiations
associated
with
species
richness
evenness
different
eukaryotic
lineages.
bioRxiv (Cold Spring Harbor Laboratory),
Год журнала:
2024,
Номер
unknown
Опубликована: Июнь 2, 2024
Abstract
The
seasonality
hypothesis
posits
that
limited
seasonal
temperature
variability
in
tropical
mountains
leads
to
greater
climatic
zonation
along
elevation
gradients
compared
temperate
regions.
This
is
predicted
result
narrow
thermal
tolerances
and
restricted
dispersal
for
organisms,
which
may
reduce
gene
flow
increase
opportunities
climate-associated
parapatric
or
allopatric
speciation
relative
temperate-zone
mountains.
has
been
tested
various
animal
groups
but
not
plants.
We
examine
the
elevational
ranges
of
pairs
sister
species
angiosperms
from
worldwide.
Our
findings
indicate
no
significant
difference
breadth
overlap
between
species.
However,
have
narrower
show
similarity
these
ones.
Such
specialization
plants
facilitates
population
divergence
within
zones
more
than
