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Pollen Tube Growth in Interspecific Crosses between Capsicum Species
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Crossing barriers between white- and purple-flowered species were examined. Four accessions of
Capsicum annuum
and three of
C. pubescens
were reciprocally crossed with one to four accessions of C.
baccatum, C. cardenasii, C. chacoense, C. chinense, C. eximium, C. frutescens, C. galapagoense,
and
C. praetermissum. Capsicum chacoense
is the only white-flowered species that inhibits
C. annuum
pollen tube growth but allows
C. pubescens
pollen tube penetration into the egg cell.
Capsicum cardenasii
and
C. eximium
exhibit similar crossabilities with
C. annuum
and C.
pubescens:
pollen tubes of
C. cardenasii
and of
C. eximium
can penetrate the egg cells of
C. annuum
but not vice versa, and pollen tubes of
C. pubescens
can penetrate the egg cells of C.
cardenasii
and of
C. eximium
but not vice versa.
American Society for Horticultural Science
Title: Pollen Tube Growth in Interspecific Crosses between Capsicum Species
Description:
Crossing barriers between white- and purple-flowered species were examined.
Four accessions of
Capsicum annuum
and three of
C.
pubescens
were reciprocally crossed with one to four accessions of C.
baccatum, C.
cardenasii, C.
chacoense, C.
chinense, C.
eximium, C.
frutescens, C.
galapagoense,
and
C.
praetermissum.
Capsicum chacoense
is the only white-flowered species that inhibits
C.
annuum
pollen tube growth but allows
C.
pubescens
pollen tube penetration into the egg cell.
Capsicum cardenasii
and
C.
eximium
exhibit similar crossabilities with
C.
annuum
and C.
pubescens:
pollen tubes of
C.
cardenasii
and of
C.
eximium
can penetrate the egg cells of
C.
annuum
but not vice versa, and pollen tubes of
C.
pubescens
can penetrate the egg cells of C.
cardenasii
and of
C.
eximium
but not vice versa.
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