A
Genetic
Linkage
Map
of
Eggplant
Doganlar,
S
.
,
Frary,
A
.
,
Daunay,
M
.
C
.
,
Lester,
R
.
N
.
,
and
Tanksley,
S
.
D
.
Cornell
University,
Plant
Breeding
Department,
Ithaca,
NY,
USA
A
genetic
linkage
map
is
being
constructed
for
eggplant
using
an
interspecific
F2
population
from
a
cross
between
cultivated
eggplant
Solanum
melongena
cv
.
Rima
and
its
wild
relative
S
.
linneanum
MM195
.
Rima
bears
large,
oblong,
purple
fruit
whereas
S
.
linneanum
has
small,
round,
green
fruit
.
The
mapping
population
consists
of
58
F2
individuals
which
have
been
scored
for
several
qualitative
and
quantitative
traits
including
fruit
size
and
shape
characteristics
.
The
final
map
will
consist
of
RFLP
markers
that
are
single
copy
in
tomato,
thereby
allowing
comparative
mapping
between
the
two
Solanaceous
species
.
Examples
of
gene
conservation
in
eggplant
and
tomato
include
regions
on
chromosome
10
of
tomato
that
contain
the
anthocyanin
gainer
(
ag
)
and
uniform
shoulder
(
u
)
genes
(Figure
1)
.
In
addition,
a
marker
(CT16)
linked
to
u
in
tomato
is
strongly
associated
with
the
presence
of
stripes
on
eggplant
fruit
.
The
availability
of
a
complete
genetic
linkage
map
for
eggplant
that
can
be
easily
compared
to
tomato
will
allow
us
to
use
the
tremendous
wealth
of
knowledge
from
tomato
genetics
to
characterize
the
genome
of
its
relative,
eggplant
.
Figure
1
.
Comparative
map
of
the
bottom
of
chromosome
10
of
tomato
and
eggplant
.
a)
eggplant
map,
b)
tomato
map
.
Mapping
indicated
that
this
region
of
the
chromosome
is
inverted
in
eggplant
relative
to
tomato
.
