Reproductive characterization of interspecific hybrids among Capsicum species

Abstract

The objective of this study was the reproductive characterization of Capsicum accessions as well as of interspecific hybrids, based on pollen viability. Hybrids were obtained between Capsicum species. Pollen viability was high in most accessions, indicating that meiosis is normal, resulting in viable pollen grains. The pollen viability of species C. pubescens was the lowest (27 %). The interspecific hybrids had varying degrees of pollen viability, from fertile combinations (C. chinense x C. frutescens and C. annuum x C. baccatum) to male sterile combinations. Pollen viability also varied within the hybrid combination according to accessions used in the cross. Results indicate that male sterility is one of the incompatibility barriers among Capsicum species since hybrids can be established, but may be male sterile.

Characterization of Capsicum species using anatomical and molecular data

“…Also, the authors hypothesized that this clustering could indicate some closeness and the possibility of gene exchange between C. baccatum, C. annuum and C. frutescens. The results obtained by Monteiro et al (2011) support this hypothesis, since fertile hybrids were obtained between the species C. annuum var. annuum (sweet or hot pepper) and C. baccatum var.…”

Production of interspecific hybrids between commercial cultivars of the eggplant (Solanum melongena L.) and its wild relative S. torvum

“…and S. melongena x S. integrifolium (Grigg et al, 1988;Ali et al, 1992;Falusi and Morakinyo, 1994). Translocations and chromosome pairing could contribute to low hybrid fertility (Kumar et al, 1987;Pickersgill, 1997;Monteiro et al, 2011). This problem can be resolved by chemical treatment with colchicine, which has been successfully applied to double the chromosome number (Anderson et al, 1991).…”

Meiotic analysis of interspecific hybrids between Capsicum frutescens and Capsicum chinense

“…Thus, it was observed satisfactory relationship between the number of normal tetrads and the viability of pollen grains. Monteiro et al (2011) evaluated interspecific hybrids obtained between Capsicum species and observed that fertility ranged from fertile combinations (C. chinense x C. frutescens) to male sterility combinations (C. baccatum var. pendulum x C. chinense).…”

“…According to Shifriss (1997), the degree of male sterility of interspecific hybrids of Capsicum depends on the accessions used in the crosses. Monteiro et al (2011) observed that the degree of viable interspecific hybrids of Capsicum ranged from high, in combinations involving C. chinense x C. frutescens, to complete male sterility, or hybrid unviability. The authors also observed that pollen viability of the interspecific hybrid depended on the accessions involved in the combination, and this was a genotype-specific viability.…”