Unilateral incompatibility in Capsicum (Solanaceae): Occurrence and taxonomic distribution

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Onus A. N., PICKERSGILL B.

ANNALS OF BOTANY, vol.94, no.2, pp.289-295, 2004 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 94 Issue: 2
  • Publication Date: 2004
  • Doi Number: 10.1093/aob/mch139
  • Journal Name: ANNALS OF BOTANY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.289-295
  • Keywords: Capsicum pubescens complex, chile pepper, incompatibility, incongruity, interspecific hybridization, pollen tube growth, S gene, LYCOPERSICON-ESCULENTUM, SELF-INCOMPATIBILITY, POLLEN-REJECTION, S-RNASE, EVOLUTION, BARRIERS, COMPATIBILITY, TOMATO
  • Akdeniz University Affiliated: Yes

Abstract

Background and aims Unilateral incompatibility (UI) occurs when pollinations between species are successful in one direction but not in the other. Self-incompatible (SI) species frequently show UI with genetically related, self-compatible (SC) species, as pollen of SI species is compatible on the SC pistil, but not vice versa. Many examples of unilateral incompatibility, and all those which have been studied most intensively, are found in the Solanaceae, particularly Lycopersicon, Solanum, Nicotiana and Petunia. The genus Capsicum is evolutionarily somewhat distant from Lycopersicon and Solanum and even further removed from Nicotiana and Petunia. Unilateral incompatibility has also been reported in Capsicum; however, this is the first comprehensive study of crosses between all readily available species in the genus.