Cytogenetic comparison of Cuscuta psorothamnensis and C. veatchii (Convolvulaceae), two species originated from recurrent hybridization between the same diploid parents
Plant Systematics and Evolution,
Год журнала:
2025,
Номер
311(2)
Опубликована: Фев. 14, 2025
Язык: Английский
Hybridization in palms (Arecaceae)
Ecology and Evolution,
Год журнала:
2024,
Номер
14(7)
Опубликована: Июль 1, 2024
Hybridization
has
significant
evolutionary
consequences
across
the
Tree
of
Life.
The
process
hybridization
played
a
major
role
in
plant
evolution
and
contributed
to
species
richness
trait
variation.
Since
morphological
traits
are
partially
product
their
environment,
there
may
be
link
between
ecology.
Plant
hybrid
is
noted
higher
harsh
environments,
we
explore
this
hypothesis
with
keystone
tropical
lineage,
palms
(Arecaceae).
Leveraging
recent
literature
review
naturally
occurring
palm
hybrids,
developed
method
calculate
frequency,
then
tested
if
phylogenetic
signal
hybrids
using
phylogeny
all
palms.
Further,
used
comparative
methods
examine
interaction
frequency
presence
dry
on
islands,
genera.
Phylogenetic
generalized
least
squares
models
had
stronger
support
than
random
association,
indicating
for
island
environments.
However,
Язык: Английский
Hybridization has localized effect on genetic variation in closely related pine species
BMC Plant Biology,
Год журнала:
2024,
Номер
24(1)
Опубликована: Окт. 26, 2024
Abstract
Background
Hybridization
is
a
known
phenomenon
in
nature
but
its
genetic
impact
on
populations
of
parental
species
remains
less
understood.
We
investigated
the
evolutionary
consequences
interspecific
gene
flow
several
contact
zones
closely
related
pine
species.
Using
set
markers
from
both
nuclear
and
organellar
genomes,
we
analyzed
four
hybrid
(384
individuals)
large
panel
reference
allopatric
taxa
(2104
individuals
96
stands).
Results
observed
reduced
diversity
maternally
transmitted
mitochondrial
genomes
pure
hybrids
compared
to
populations.
The
distribution
mt
DNA
haplotypes
followed
geographic
rather
than
boundaries.
Additionally,
no
new
emerged
zones,
instead
these
contained
most
common
local
variants.
However,
diverged
significantly
at
exhibited
similar
or
higher
stands.
There
were
signs
admixture
any
population,
while
clear
was
evident
indicating
that
hybridization
has
geographically
localized
effect
variation
Conclusions
Our
results
suggest
act
as
sinks
melting
pots
diversity.
influences
sympatric
confined
zones.
spectrum
ancestry
reflects
old
history
These
findings
also
imply
introgression
may
play
crucial
role
adaptation
specific
environments.
Язык: Английский
Cytogenetic comparison of Cuscuta psorothamnensis and C. veatchii (Convolvulaceae), two species originated from recurrent hybridization between the same diploid parents
bioRxiv (Cold Spring Harbor Laboratory),
Год журнала:
2024,
Номер
unknown
Опубликована: Апрель 19, 2024
Genus
Cuscuta
L.
(Convolvulaceae)
exhibits
cases
of
hybridization
and
allopolyploidy.
Section
Denticulatae,
subg.
Grammica,
includes
four
species:
the
allopolyploids,
C.
veatchii
psorothamnensis
(2n
=
60),
which
originated
from
two
independent
reticulation
events
between
diploids,
denticulata
nevadensis
30).
The
allopolyploids
are
morphologically
similar,
but
differing
in
their
geographical
distribution
host
specificity.
While
cytogenetic
data
have
been
reported
for
veatchii,
this
study
aims
to
provide
a
comparative
analysis
with
psorothamnensis.
To
characterize
chromosomal
complement
compare
it
we
used
CMA/DAPI
banding,
FISH,
GISH.
karyotypes
both
species
displayed
similarity
chromosome
number,
size,
symmetry,
interphase
nucleus
organization.
Both
exhibited
pair
5S
35S
rDNA
sites
adjacent
on
same
chromosome.
number
is
variable,
some
individuals
displaying
four,
five,
six
sites.
Our
results
show:
1)
carrying
retained
polyploids;
2)
loss
occurred
tetraploids;
3)
part
complex,
successive
nevadensis;
4)
probably
more
recent
origin
than
based
degree
diploidization.
This
comparison
allows
us
understand
processes
involved
emergence
new
polyploid
by
hybridization.
Язык: Английский