A
self
-
compatible
population
of
Lycopersicon
peruvianum
collected
from
N
.
Chil
Graham,
E
.
B,
Shannon,
S
.
M
.
,
Petersen,
J
.
P
.
,
and
Chetelat,
R
.
T
.
e
C
.
M
.
R
vis,
a,
s
self
-
fruit
harvested
from
three
plants
showed
ormal
seed
set
(40
-
60
seeds/fruit)
.
In
addition,
growth
of
pollen
tubes
was
observed
lination
of
three
flowers
from
each
of
10
plants
using
the
aniline
uorescence
method
of
Martin
(1959)
.
In
all
flowers
we
observed
pollen
tubes
reaching
the
flowers
ccessions
of
L
.
peruvianum
or
L
.
chilense
showed
e
normal
arrest
of
pollen
tube
growth
in
the
upper
half
of
the
style
following
self
pollination
.
rs,
all
trait
.
peruvianum
.
Several
morphological
features
of
the
Camina
eruvianum
differ
from
typical
SI
accessions,
and
are
suggestive
of
self
-
pollination
in
the
parent
reduct
Plants
also
have
a
more
diminutive
tature
than
outcrossing
forms
.
Secondly,
flowers
are
somewhat
smaller,
with
less
e
1
.
5
mm
at
11
iso
,
-
2
,
Got
-
2
,
-
3
,
Idh
-
1
,
Pgi
-
1
,
Pgm
-
1
,
and
Prx
-
2
)
.
Nearly
all
accessions
of
L
.
peruvianum
examined
to
date
are
SI
.
Of
the
ca
.
180
active
(Rick
1
hich
is
clos
native
distribution
.
LA2157
has
all
the
allmarks
of
a
naturally
self
-
compatible
race,
including
small
flowers
with
little
or
no
stigma
segreg
hese
include
LA1708
LA2172
from
Cajamarca
(R
.
Robinson,
pers
.
comm
.
),
and
LA1278
from
Dept
.
Lima
(J
.
.
Guerra
-
Sanz,
pers
.
comm
.
)
.
Regarding
the
latter
accession,
we
observed
partial
fruit
set
fter
selfing
on
only
a
minority
of
the
plants
tested
(3
of
15)
.
Examination
of
pollen
tube
growth
revealed
a
nearly
complete
SI
response
.
Based
on
our
observations
of
pollen
tube
growth,
fruit
set,
morphology,
and
marker
homozygosity,
LA4125
appears
to
have
a
ick
Tomato
Genetics
Resource
Center,
Department
of
Vegetable
Crops,
UC
Da
Davis,
CA
95616
.
Email:
tgrc@vegmail
.
ucdavis
.
edu
Lycopersicon
peruvianum
accession
LA4125
was
collected
in
2001
on
a
TGRC
-
led
trip
to
Northern
Chile
.
It
was
found
growing
along
a
roadside
in
the
valley
of
the
Rio
Camin
near
the
town
of
Camina,
in
the
Tarapaca
region
(19°18’22”
S,
69°
25’14”
W,
2510
masl)
.
This
drainage
represents
the
southernmost
limit
of
the
distribution
of
L
.
peruvianum
,
as
far
a
we
can
tell
.
While
growing
plants
for
seed
increase
in
the
greenhouse
at
UC
Davis
in
2002
-
03
we
observed
fruit
set
without
manual
cross
pollination,
suggesting
that
it
might
be
a
compatible
(Sc)
strain
.
The
nature
of
its
mating
system
was
investigated
further
by
performing
controlled
self
pollinations
and
recording
fruit
set
.
Of
the
10
plants
tested,
all
set
fruit
after
manual
self
pollinations
(Table
1)
.
Selfed
n
following
self
-
pol
fl
bottom
of
the
style
and
the
ovaries,
consistent
with
a
Sc
reaction
(Table
1)
.
In
contrast,
from
known
self
-
incompatible
(SI)
a
th
Inflorescences
of
LA4125
are
unbranched,
with
enlarged
bracts
and
curved
anthe
s
seen
in
SI
L
p
wild
.
First,
overall
leaf
size
is
reduced,
mostly
due
to
a
shorter
rachis,
with
little
ap
ion
in
leaflet
size
or
number
of
leaflets
per
leaf
.
s
pronounced
coloration
of
the
corolla,
and
a
moderate
degree
of
stigma
exsertion
(averag
)
.
Finally,
plants
are
morphologically
uniform,
and
showed
complete
homozygosity
zyme
loci
(
6pgdh
-
1
,
-
2
,
-
3
,
Aco
-
1
collections
maintained
at
our
Center
only
one
accession
(LA2157)
is
fully
self
compatible
986)
.
The
latter
was
collected
at
Tunel
Chotano
in
Dept
.
Cajamarca,
a
location
w
e
to
the
northern
boundary
of
this
species’
h
exsertion,
heavy
fruit
set,
and
diminutive
stature
.
Other
accessions
have
been
reported
to
ate
for
Sc
vs
.
SI,
possibly
as
a
result
of
artificial
inbreeding
.
T
and
M
a
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