The Complex Genetic Legacy of Hybridization and Introgression between the Rare Ocotea loxensis van der Werff and the Widespread O. infrafoveolata van der Werff (Lauraceae)
Plants,
Journal Year:
2024,
Volume and Issue:
13(14), P. 1956 - 1956
Published: July 17, 2024
Hybridization
and
introgression
are
complex
evolutionary
mechanisms
that
can
increase
species
diversity
lead
to
speciation,
but
may
also
extinction.
In
this
study,
we
tested
the
presence
genetic
consequences
of
hybridization
between
rare
Ecuadorian
endemic
Language: Английский
Phylogenetic challenges in a recently diversified and polyploid-rich Alyssum (Brassicaceae) lineage: low divergence, reticulation, and parallel polyploid speciation
Evolution,
Journal Year:
2023,
Volume and Issue:
77(5), P. 1226 - 1244
Published: Feb. 23, 2023
Abstract
Elucidating
the
evolution
of
recently
diverged
and
polyploid-rich
plant
lineages
may
be
challenging
even
with
high-throughput
sequencing,
both
for
biological
reasons
bioinformatic
difficulties.
Here,
we
apply
target
enrichment
genome
skimming
(Hyb-Seq)
to
unravel
evolutionary
history
Alyssum
montanum-A.
repens
species
complex.
Reconstruction
phylogenetic
relationships
in
diploids
supported
recent
rapid
diversification
accompanied
by
reticulation
events.
Of
4
main
clades
identified
among
diploids,
3
included
from
Alps,
Apennine,
Balkan
peninsulas,
indicating
close
biogeographic
links
between
these
regions.
We
further
focused
on
clade
distributed
Western
Alps
Iberian
Peninsula,
which
comprises
numerous
polyploids
as
opposed
a
few
diploids.
Using
developed
PhyloSD
(phylogenomic
subgenome
detection)
pipeline,
successfully
tracked
ancestry
all
polyploids.
inferred
multiple
polyploidization
events
that
involved
2
closely
related
diploid
progenitors,
resulting
into
several
sibling
polyploids:
autopolyploids
6
allopolyploids.
The
skewed
proportions
major
homeolog-types
occurrence
some
minor
homeolog-types,
exhibiting
geographic
patterns,
suggest
introgression
progenitors
other
Our
study
highlights
unique
case
parallel
polyploid
speciation
was
enhanced
ecological
separation
provides
an
excellent
resource
future
studies
evolution.
Language: Английский
Untangling the origin and diversification of the Carthamus–Carduncellus complex (Cardueae, Compositae) in the Mediterranean basin
Journal of Systematics and Evolution,
Journal Year:
2024,
Volume and Issue:
62(5), P. 1009 - 1024
Published: Feb. 24, 2024
Abstract
Understanding
the
richness
and
diversification
processes
in
Mediterranean
basin
requires
both
knowledge
of
current
environmental
complexity
paleogeographic
paleoclimate
events
information
from
studies
that
introduce
temporal
dimension.
The
Carthamus–Carduncellus
complex
(Cardueae,
Compositae)
constitutes
a
good
case
study
to
investigate
biogeographic
history
this
region
because
it
evolved
throughout
basin.
We
performed
molecular
dating,
ancestral
area
estimation,
analyses
based
on
previous
phylogenetic
nearly
complete
taxon
sampling
complex.
main
aims
were
determine
role
tectonic
climatic
disjunction
expansion
route
two
lineages,
Carduncellus
s.l.
Carthamus
.
Our
results
suggest
lineages
originated
during
Miocene.
Later,
all
paleoclimatic
Neogene
Pleistocene
had
an
important
imprint
evolutionary
Messinian
Salinity
Crisis
facilitated
dispersion
genus
North
Africa
Iberian
Peninsula
split
genera
Phonus
Femeniasia
lineage.
onset
climate
Pliocene
together
with
some
orogenic
could
be
causes
In
contrast,
glaciations
played
key
species
addition,
we
emphasize
problems
derived
secondary
dating
existing
differences
between
tribe
Cardueae.
Language: Английский
Ecological correlates of population genetics in Linum suffruticosum, an heterostylous polyploid and taxonomic complex endemic to the Western Mediterranean Basin
AoB Plants,
Journal Year:
2024,
Volume and Issue:
16(4)
Published: May 20, 2024
Abstract
Linum
suffruticosum
s.l.
is
a
taxonomic
complex
widespread
in
the
Western
Mediterranean
basin.
The
characterized
by
high
phenotypic
and
cytogenetic
diversity,
unique
three-dimensional
heterostyly
system
that
makes
it
an
obligate
outcrosser.
We
studied
patterns
of
genetic
diversity
structure
populations
throughout
entire
distribution
L.
with
microsatellite
markers.
analysed
their
relationships
various
biological
ecological
variables,
including
morph
ratio
sex
organ
reciprocity
measured
novel
multi-dimensional
method.
Populations
consistently
showed
approximate
1:1
diversity.
found
differentiation
populations,
showing
pattern
isolation
distance.
Rif
mountains
NW
Africa
were
most
important
barrier.
treatment
within
group
was
not
related
to
but
environmental
differentiation.
Genetic
unrelated
latitude,
elevation,
population
size,
niche
suitability
or
breeding
system.
However,
there
clear
influence
ploidy
level
on
seeming
centre–periphery
its
distribution.
Our
results
suggest
polyploidization
events,
outcrossing
rates,
distance
geographical
barriers
gene
flow
have
played
major
roles
microevolutionary
history
this
species
complex.
Language: Английский
Anthemis sect. Hiorthia (Asteraceae) on Kriti Island, Greece: high ploidy levels and a new species
PhytoKeys,
Journal Year:
2023,
Volume and Issue:
229, P. 113 - 129
Published: July 13, 2023
A
morphological
and
karyological
investigation
of
the
Anthemissect.Hiorthia
representatives
Kriti
(Greece)
revealed
that
three
different
species
are
found
on
island,
all
endemic,
each
characterised
by
a
ploidy
level
based
haploid
series
x
=
9.
Anthemisabrotanifolia,
with
widest
distribution,
is
tetraploid
2n
4x
36.
A.samariensis,
local
endemic
Lefka
Ori,
was
being
decaploid,
10x
90,
highest
number
ever
recorded
in
Anthemis.
The
recently
discovered
population
Mt.
Kedros
(south-central
Kriti)
morphologically
distinct
from
Anthemis
entities
growing
Kriti;
it
also
differs
variable
widespread
A.cretica
group.
It
here
described
as
new
species,
A.pasiphaes
Goula
&
Constantinidis.
hexaploid,
6x
54.
All
chromosome
numbers
reported
for
first
time.
Polyploidy
might
have
acted
reproductive
barrier
among
these
perennial
complementing
isolation
spatial
distance
evolutionary
divergence.
Further,
contributed
adaptation
advantages
to
predominately
mountain
species.
Language: Английский