TGC
REPORT
No
.
31,
1981
RESEARCH
NOTES
10
The
hybrids
L
.
pimpinellifolium
X
F
1
(L
.
peruvianum
X
L
.
hirsutum)also
studied
last
year,
gave
similar
results,
only
fruits
were
small
.
A
few
years
ago,
I
had
three
hybrids
of
L
.
peruvianum
X
L
.
esculentum
made
via
periclinal
chimera
L
.
peruvianum
+
L
.
esculentum
.
Those
plants
also
very
much
resembled
the
L
.
esculentum
parent,
and
it
was
very
difficult
to
ascertain
that
they
were
really
hybrids
.
It
seems
therefore
that
dominance
of
L
.
esculentum
characters
probably
did
not
depend
on
the
direction
of
crossing
.
It
is
important
to
note
that
all
such
observations
concerned
hybrids
with
participation
of
the
L
.
pervuianum
genotype
.
I
did
not
notice
similar
phenomena
after
crossing
L
.
esculentum
with
L
.
hirsutum
.
It
is
yet
too
early
to
discuss
reasons
for
the
described
phenomena;
this
intriguing
problem
needs
further
research
.
Lukyanenko,
A
.
N
.
and
M
.
E
.
Egioyan
A
new
A
new
spontaneous
mutant
has
been
tomato
mutant
.
found
in
the
local
line
at
Krimsk
Plant
Breeding
Station
of
All
-
Union
Institute
of
Plant
Industry
.
Its
phenotypical
manifestation
is
the
following:
mutant
plants
have
a
tall
indeterminate
bush,
a
prolonged
form
of
fruit
(index
1
.
5
-
1
.
6)
with
a
modified
tip
.
At
the
tip
of
the
fruit
there
is
a
hollow
5
-
10
mm
deep
from
which
an
epiglottis
extends
.
The
form
of
the
tip
resembles
a
flower
of
the
snapdragon
(
Antirrhinum),
hence
the
gene
determining
this
trait
is
indicated
by
us
with
the
anr
symbol
.
The
analysis
of
a
number
of
crosses
with
the
mutant
showed
this
trait
to
be
a
recessive
character
.
The
gene
is
linked
with
sp
+
,
hence
it
is
probably
on
chromosome
6
.
Pleiotropic
action
of
the
gene
is
a
very
weak
joint
of
the
fruit
stem
and
a
hollow
fruit
.
The
mutant
is
easily
identified
under
field
and
greenhouse
conditions
.
Martin,
B
.
A
.
Experiments
on
the
phos
-
Tomato
plants
homozygous
for
the
phate
deficiency
syndrome
mutant
recessive
phosphate
deficiency
(
pds)
.
(Submitted
by
C
.
M
.
Rick)
syndrome
allele
(pds)
exhibited
what
appeared
to
be
severe
phosphate
deficiency
symptoms,
i
.
e
.
small
stature,
purple
coloration,
and
chlorosis
of
older
leaves
when
grown
on
supraoptimal
concentrations
of
inorganic
phosphate
(Pi)
(Rick,
Zobel,
Opeña
1970,
TGC
20:52
-
54)
.
In
addition,
when
pds/pds
scions
were
grafted
onto
wild
type
root
-
stocks,
the
plants
appeared
phosphate
deficient
.
When
the
reciprocal
graft
was
made,
wild
type
scion
onto
pds/pds
root
-
stock,
the
plants
grew
normally
(C
.
Rick
and
J
.
Fobes,
personal
communication)
.
This
evidence
suggested
that
pds/pds
shoots
were
unable
to
produce
a
metabolite
necessary
for
normal
growth
.
The
roots
were
either
able
to
produce
the
metabolite
or
it
was
imported
from
normal
leaves
.
Experiments
were
designed
to
determine
whether
the
pds
mutation
was
expressed
in
callus
made
from
homozygous
pds
plants
and
to
determine
whether
the
pds
allele
is
a
lesion
in
either
P
-
choline
transport
or
metabolism
since
P
-
choline
is
the
primary
form
of
organic
phosphate
transported
in
the
xylem
sap
of
tomatoes
.
Further
grafting