Contrasting patterns of differentiation among three taxa of the rapidly diversifying orchid genus Ophrys sect. Insectifera (Orchidaceae) where their ranges overlap
Botanical Journal of the Linnean Society,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Oct. 17, 2024
Abstract
In
rapidly
diversifying
groups,
taxa
defined
on
the
basis
of
typological
criteria
can
be
difficult
to
support
with
genetic
data.
The
diversity
observed
in
insect-mimicking
orchid
genus
Ophrys
perfectly
illustrates
this
situation;
among
400
described
species
only
9–10
lineages
are
detectable
by
markers
such
as
nrITS.
three
insectifera
group,
O.
insectifera,
subinsectifera,
and
aymoninii,
clearly
distinguished
their
flowers,
which
have
evolved
different
phenotypes
a
result
adaptation
specific
pollinator
insect
from
families.
However,
differentiation
between
these
has
never
been
really
supported
population
data
taxonomic
status
is
still
debated.
Using
genomic
approaches,
we
found
clustering
consistent
existence
entities
where
geographic
distributions
overlap.
Two
clusters
correspond
France
populations
widespread
micro-endemic
aymoninii.
last
cluster
grouped
together
all
Iberian
individuals,
suggesting
that
individuals
phenotypically
identified
either
or
subinsectifera
genetically
weakly
differentiated
there.
Populations
two
pairs
thus
may
experienced
patterns
inter-specific
gene
flow.
Language: Английский
Floral phenotypic divergence and genomic insights in an Ophrys orchid: unraveling early speciation processes
New Phytologist,
Journal Year:
2024,
Volume and Issue:
245(2), P. 849 - 868
Published: Nov. 18, 2024
Summary
Adaptive
radiation
in
Ophrys
orchids
leads
to
complex
floral
phenotypes
that
vary
scent,
color
and
shape.
Using
a
novel
pipeline
quantify
these
phenotypes,
we
investigated
trait
divergence
at
early
stages
of
speciation
six
populations
aveyronensis
experiencing
recent
allopatry.
By
integrating
different
genetic/genomic
techniques,
investigated:
variation
integration
components
(scent,
shape);
genomic
regions
under
divergent
selection;
the
bases
variation.
We
identified
large
island
divergence,
likely
associated
with
phenotypic
particular
odor.
detected
potential
selection
on
macular
color,
while
stabilizing
was
suspected
morphology
for
several
volatile
olfactive
compounds.
also
candidate
genes
involved
anthocyanin
steroid
biosynthesis
pathways
standing
genetic
This
study
sheds
light
differentiation
,
revealing
patterns
often
become
invisible
over
time,
is
geographic
mosaic
traits
appearance
strong
divergence.
It
supports
crucial
region
future
investigation
highlights
value
multifaceted
approach
unraveling
within
taxa
genomes.
Language: Английский