Communications Biology,
Год журнала:
2020,
Номер
3(1)
Опубликована: Ноя. 25, 2020
Abstract
Crop
productivity
must
increase
at
unprecedented
rates
to
meet
the
needs
of
growing
worldwide
population.
Exploiting
natural
variation
for
genetic
improvement
crops
plays
a
central
role
in
increasing
productivity.
Although
current
genomic
technologies
can
be
used
high-throughput
identification
variation,
methods
efficiently
exploiting
this
potential
targeted,
systematic
manner
are
lacking.
Here,
we
developed
haplotype-based
approach
identify
diversity
crop
using
genome
assemblies
from
15
bread
wheat
(
Triticum
aestivum
)
cultivars.
We
stringent
criteria
identical-by-state
haplotypes
and
distinguish
these
near-identical
sequences
(~99.95%
identity).
showed
that
each
cultivar
shares
~59
%
its
with
other
sequenced
cultivars
detected
presence
extended
haplotype
blocks
containing
hundreds
thousands
genes
across
all
chromosomes.
found
genic
sequence
alone
was
insufficient
fully
differentiate
between
haplotypes,
as
were
commonly
array-based
genotyping
chips
due
their
gene
centric
design.
successfully
focused
discovery
novel
landrace
collection
documented
trait
modern
wheat.
This
study
provides
framework
defining
efficiency
precision
breeding
towards
optimising
agronomic
performance
crucial
crop.
Nature,
Год журнала:
2020,
Номер
588(7837), С. 277 - 283
Опубликована: Ноя. 25, 2020
Abstract
Advances
in
genomics
have
expedited
the
improvement
of
several
agriculturally
important
crops
but
similar
efforts
wheat
(
Triticum
spp.)
been
more
challenging.
This
is
largely
owing
to
size
and
complexity
genome
1
,
lack
genome-assembly
data
for
multiple
lines
2,3
.
Here
we
generated
ten
chromosome
pseudomolecule
five
scaffold
assemblies
hexaploid
explore
genomic
diversity
among
from
global
breeding
programs.
Comparative
analysis
revealed
extensive
structural
rearrangements,
introgressions
wild
relatives
differences
gene
content
resulting
complex
histories
aimed
at
improving
adaptation
diverse
environments,
grain
yield
quality,
resistance
stresses
4,5
We
provide
examples
outlining
utility
these
genomes,
including
a
detailed
multi-genome-derived
nucleotide-binding
leucine-rich
repeat
protein
repertoire
involved
disease
characterization
Sm1
6
associated
with
insect
resistance.
These
will
basis
functional
discovery
deliver
next
generation
modern
cultivars.
Nature Genetics,
Год журнала:
2021,
Номер
53(4), С. 574 - 584
Опубликована: Март 18, 2021
Abstract
Rye
is
a
valuable
food
and
forage
crop,
an
important
genetic
resource
for
wheat
triticale
improvement
indispensable
material
efficient
comparative
genomic
studies
in
grasses.
Here,
we
sequenced
the
genome
of
Weining
rye,
elite
Chinese
rye
variety.
The
assembled
contigs
(7.74
Gb)
accounted
98.47%
estimated
size
(7.86
Gb),
with
93.67%
(7.25
assigned
to
seven
chromosomes.
Repetitive
elements
constituted
90.31%
genome.
Compared
previously
Triticeae
genomes,
Daniela
,
Sumaya
Sumana
retrotransposons
showed
strong
expansion
rye.
Further
analyses
assembly
shed
new
light
on
genome-wide
gene
duplications
their
impact
starch
biosynthesis
genes,
physical
organization
complex
prolamin
loci,
expression
features
underlying
early
heading
trait
putative
domestication-associated
chromosomal
regions
loci
This
sequence
promises
accelerate
breeding
related
cereal
crops.
Plant Breeding,
Год журнала:
2019,
Номер
139(3), С. 429 - 454
Опубликована: Дек. 12, 2019
Abstract
Fusarium
head
blight
is
among
the
most
extensively
studied
fungal
diseases
of
wheat
and
other
small
grain
cereals
due
to
its
impact
on
yield
quality,
but
particularly
potential
produce
mycotoxins,
which
are
harmful
humans
animals.
Since
our
last
comprehensive
review
QTL
mapping
marker‐assisted
selection
for
FHB
resistance
in
2009,
numerous
studies
have
been
conducted
identify,
validate
or
fine‐map
QTL.
The
main
aim
this
update
summarize
findings
breeding
published
during
decade.
Furthermore,
we
compiled
a
user‐friendly
table
listing
data
providing
valuable
resource
further
research.
role
morphological
phenological
traits
possible
consequences
discussed.
This
concentrates
current
knowledge
suggests
strategies
enhance
by
deploying
molecular
methods,
including
genomic
selection.
Nature Communications,
Год журнала:
2020,
Номер
11(1)
Опубликована: Окт. 8, 2020
Abstract
Tibetan
wheat
is
grown
under
environmental
constraints
at
high-altitude
conditions,
but
its
underlying
adaptation
mechanism
remains
unknown.
Here,
we
present
a
draft
genome
sequence
of
semi-wild
(
Triticum
aestivum
ssp.
tibetanum
Shao)
accession
Zang1817
and
re-sequence
245
accessions,
including
world-wide
landraces,
cultivars
as
well
landraces.
We
demonstrate
that
environments
can
trigger
extensive
reshaping
genomes,
also
uncover
accessions
accumulate
adapted
haplotypes
related
genes
in
response
to
harsh
constraints.
Moreover,
find
feral
form
landrace,
identify
two
associated
loci,
0.8-Mb
deletion
region
containing
Brt1/2
homologs
genomic
with
TaQ-5A
gene,
responsible
for
rachis
brittleness
during
the
de-domestication
episode.
Our
study
provides
confident
evidence
support
hypothesis
de-domesticated
from
local
extremes.
The Plant Cell,
Год журнала:
2022,
Номер
34(7), С. 2549 - 2567
Опубликована: Май 1, 2022
Bread
wheat
(Triticum
aestivum,
genome
BBAADD)
is
a
young
hexaploid
species
formed
only
8,500-9,000
years
ago
through
hybridization
between
domesticated
free-threshing
tetraploid
progenitor,
BBAA,
and
Aegilops
tauschii,
the
diploid
donor
of
D
subgenome.
Very
soon
after
its
formation,
it
spread
globally
from
cradle
in
fertile
crescent
into
new
habitats
climates,
to
become
staple
food
humanity.
This
extraordinary
global
expansion
was
probably
enabled
by
allopolyploidy
that
accelerated
genetic
novelty
acquisition
traits,
intergenomic
interactions,
buffering
mutations,
attractiveness
bread
wheat's
large,
tasty,
nutritious
grain
with
high
baking
quality.
New
sequences
suggest
elusive
B
subgenome
distinct
(unknown
or
extinct)
rather
than
mosaic
genome.
We
discuss
origin
progenitors
conflicting
archaeological
evidence
on
where
which
progenitor.
Wheat
experienced
many
environmental
changes
throughout
evolution,
therefore,
while
might
adapt
current
climatic
changes,
efforts
are
needed
better
use
conserve
vast
gene
pool
biodiversity
our
security
depends.
Molecular Plant,
Год журнала:
2022,
Номер
15(3), С. 488 - 503
Опубликована: Янв. 1, 2022
Common
wheat
(Triticum
aestivum,
BBAADD)
is
a
major
staple
food
crop
worldwide.
The
diploid
progenitors
of
the
A
and
D
subgenomes
have
been
unequivocally
identified;
that
B,
however,
remains
ambiguous
controversial
but
suspected
to
be
related
species
Aegilops,
section
Sitopsis.
Here,
we
report
assembly
chromosome-level
genome
sequences
all
five
Sitopsis
species,
namely
Aegilops
bicornis,
Ae.
longissima,
searsii,
sharonensis,
speltoides,
as
well
partial
Amblyopyrum
muticum
(synonym
mutica)
for
phylogenetic
analysis.
Our
results
reveal
donor
common
B
subgenome
distinct,
most
probably
extinct,
diverged
from
an
ancestral
progenitor
lineage
which
still
extant
speltoides
Am.
belong.
In
addition,
identified
interspecific
genetic
introgressions
throughout
evolution
Triticum/Aegilops
complex.
various
assembled
sizes
(4.11–5.89
Gb)
with
high
proportions
repetitive
(85.99%–89.81%);
nonetheless,
they
retain
collinearity
other
genomes
or
in
Differences
size
were
primarily
due
independent
post-speciation
amplification
transposons.
We
also
set
genes
pertinent
important
agronomic
traits
can
harnessed
breeding.
These
newly
resources
provide
new
roadmap
evolutionary
studies
complex,
improvement.
