Capsicum tovarii, a new member of the Capsicum baccatum complex
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Interspecific hybrid performance and meiotic chromosome behavior of F1 hybrids were studied to elucidate the genetic relationship between C. tovarii and the other Capsicum species. C. tovarii was hybridized, as a female and a male parent, to C. annuum, C. chinense, C. frutescens, C. chacoense, C. galapogense, C. baccatum, C. praetermissum, C. cardenasii, C. eximium and C. pubescens. When the hybridization of C. baccatum × C. tovarii was performed, F1, F2 and backcross progenies were successfully obtained. In addition, a successful hybridization of C. praetermissum × C. tovarii was also obtained. A cytological investigation of F1 hybrids of C. baccatum × C. tovarii revealed that most meiotic chromosomes paired as bivalents. However, multivalents, chromosome bridges, and chromosome lags were observed. These results suggest that C. baccatum differs from C. tovarii by at least a chromosomal reciprocal translocation. Crosses of C. tovarii to C. chinense and C. frutescens produced plump seeds, but none of the seeds germinated. Hybridizations of C. tovarii to C. pubescens, C. eximium and C. cardenasii did not produce seed. These hybridization results indicate that C. tovarii is genetically more closely related to the C. baccatum complex than to the C. annuum complex or the C. pubescens complex.
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