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KMID : 0903620040450060324
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Journal of the Korean Society for Horticultural Science
2004 Volume.45 No. 6 p.324 ~ p.329
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Interspecific Cross Compatibility among Five Domesticated Species of Capsicum Genus
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Yoon Jae-Bok
Do Jae-Wahng
Yang Dong-Cheol
Park Hyo-Guen
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Abstract
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The Capsicum genus includes 27 species; 5 domesticated and 22 wild ones. Among the 5 domesticated species, C. annuum is the most widely cultivated commercial species and thus, intensive breeding programs have been being carried out to improve this species worldwide. Recently, it has been reported that almost all traits needed for pepper breeding are mainly found in related or wild species of cultivated pepper (C. annuum). This experiment was carried out to determine interspecific crossability among 13 different genotypes of 5 cultivated species. The crosses of C. annuum with C. chinense or with C. frutescens were compatible or partial-compatible in many cases, although there were some differences in crossability among genotypes within the two parental species. In contrast, the crosses of C. annuum with C. baccatum or with C. pubescens were completely incompatible. The cause of incompatibility between C. annuum and C. baccatum was determined to be embryo and/or endosperm abortion. Several crosses determined as incompatible by the conventional crossability test were able to be re-determined as partial-compatible through an embryo rescue technique. Consequently, this experiment extended the boundary of breeding by interspecific hybridization in chili peppers.
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KEYWORD
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cross incompatibility, diallel cross, embryo rescue, genetic resources, interspecific hybridization
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