Jumping
tomato
gene
"
gs
"
Avdeyev,
Y
.
I
.
and
Kigashpaeva,
O
.
P
.
Russian
Scientific
Institute
of
Irrigative
Vegetable
and
Melon
Growing
The
gene
"
gs
"
determines
green
stripes
in
the
epidermis
of
unripe
fruit
and
golden
stripes
in
ripe
fruit
.
It
is
located
on
chromosome
7
in
position
5,
in
the
same
location
as
the
pst
gene,
which
controlls
the
persistance
of
the
style
on
the
fruit,
resulting
in
beak
(Mutschler
et
al
.
1987)
.
The
gene
"
gs
"
is
accepted
as
being
recessive,
but
on
the
fruits
of
gs/+
genotype
pale
green
stripes
are
visible,
especially
on
the
lower
fruits
shaded
by
leaves
.
Using
the
variety
Tigerella
as
background,
we
selected
several
samples
with
round
and
plum
-
like
fruit
shapes,
including
such
types
as
Crupny
Avuri,
in
which
the
pst
gene
is
not
expressed
(photo
1)
.
After
10
-
12
years
of
using
gs
-
selection
we
noted
that
some
plants
in
the
original
lines,
not
hybridized
with
gs
-
forms,
had
developed
obvious
stripes
.
In
1996,
among
lines
of
the
parental
variety
Bachtemir
2,
we
discovered
one
line
in
which
some
plants
formed
all
gs
-
fruits
or
all
normal
fruits;
on
other
plants
gs
-
fruits
were
only
on
one
main
or
lateral
stems;
on
a
third
group
of
plants
such
fruits
were
only
on
1
-
2
or
more
clusters,
or
only
on
1
-
2
or
more
fruits
.
In
addition,
fruits
with
green
stripes
at
1/2
or
1/4
of
the
surface
and
only
with
1
-
4
or
more
stripes
were
found
(photo
2)
.
Some
plants
were
with
very
clear
stripes
on
the
fruit,
similar
to
those
of
genotype
gs/gs
,
but
on
other
plants
the
stripes
were
pale,
comparable
to
plants
of
genotype
gs
/+
.
From
plants
of
this
line
we
gathered
seed
for
screening
the
next
generations
.
Analysis
of
the
next
and
the
following
generation
showed
that
all
plants
kept
the
genotype
of
the
initial
Bachtemir
2
variety
(genes
d
,
u
,
j
-
2
;
round
fruit,
100
g,
etc
.
)
but
segregation
of
the
gs
character
was
also
present,
as
described
above
.
The
gs
character
demonstrated
nonstability
.
In
the
generation
of
one
plant
(No
.
4/10)
a