facultative
mating
system
similar
to
LA2157
.
The
geographic
distribution
of
these
two
populations
with
respect
to
the
rest
of
L
.
peruvianum
is
analogous
to
the
situation
in
L
.
hirsutum
and
L
.
pennellii
.
All
are
predominantly
SI,
with
Sc
biotypes
occurring
at
the
northern
r
southern
margins
(Rick
et
al,
1979,
Rick
and
Tanksley
1981)
.
An
interesting
aspect
of
the
Camina
Sc
population
is
the
nature
of
its
unilateral
incompatibility
reaction
.
e
v
a
nnellii
LA716,
the
Sc
biotype
hybridizes
succ
he
male
parent
with
an
SI
accession
and
the
progeny
exhibit
the
same
level
of
se
(Hardon
1967,
Rick
1986)
.
When
LA4125
is
crossed
as
the
male
parent
with
an
SI
L
.
peruvianum
accession
the
cross
fails,
although
the
reciprocal
cross
is
fully
compatible
(Table
2)
.
Like
LA716,
styles
of
LA4125
rejec
ollen
of
f
self
-
c
le
(SC
esculentu
.
These
observations
suggest
that
expression
of
se
compa
LA41
s
fundame
ally
different
from
that
manifested
by
LA716
.
The
former
appears
to
carry
a
lack
of
function
mutation
for
pollen
phenotype,
whereas
the
latter
expresses
a
self
-
fertility
allele
that
is
functional
on
styles
with
SI
activity
.
For
a
discussion
of
symbols
used
to
describe
compatibility
reactions
(SI,
Sc,
SC,
and
UI)
and
evolutionary
theory
see
Lewis
and
Crowe
(1958)
.
Literature
Cited
ardon,
JJ
.
1967
.
Unilateral
incompatibility
between
Solanum
pennellii
and
Lycopersicon
artin,
FW
.
1959
.
Staining
and
observing
pollen
tubes
in
the
style
by
means
of
fluorescence
.
Stain
Technology
34:125
-
128
.
R
1
ep
e
in
op
per
ianu
ex
.
In:
and
Systematics
of
the
eae
.
C
nive
ss
o
7
R
Fo
,
a
sl
9
lut
atin
yst
cop
icon
c
variation
in
ra
Pla
Ev
79
R
an
sle
98
eti
ion
num
enn
par
ns
Plant
Sys
Evol
139:11
-
45
.
o
In
the
cas
essfully
as
t
of
L
.
peru
ianum
LA2157
nd
L
.
pe
lf
-
compatibility
as
the
parent
t
p
ully
ompatib
)
L
.
m
lf
-
tibility
in
25
i
nt
H
esculentum
.
Genetics
57:795
-
808
.
Lewis,
D
and
Crowe,
LK
.
1958
.
Unilateral
incompatibility
in
flowering
plants
.
Heredity
12:233
-
256
.
M
ick,
CM
.
D’Arcy
WG
(ed)
Biology
986
.
R
roductiv
isolation
the
Lyc
ersicon
Solanac
uv
m
compl
olumbia
U
rsity
Pre
,
New
Y
rk,
pp
47
-
495
.
ick
CM,
bes
JF
nd
Tank
ey
SD
.
1
79
.
Evo
ion
of
m
g
s
ems
in
Ly
ers
hirsutum
cha
as
deduced
from
geneti
cters
.
electrophoretic
and
morphological
nt
Sys
ol
132:2
-
298
.
ick
CM,
d
Tank
y
SD
.
1
1
.
Gen
c
variat
in
Sola
p
ellii
:
Com
iso
with
two
other
sympatric
species
.
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