A study of the mating system in Dolichandra cynanchoides (Bignoniaceae): an Argentinian Chaco woodlands liane with a late-acting self-incompatibility

Journal article

We estimated the outcrossing rate in a population of 14 individuals of Dolichandra cynanchoides (Bignoniaceae), a species with late-acting self-incompatibility (LSI), at a site in Chaco woodland in Santa Fe province, Argentina. A subsample of five arbitrarily chosen loci from a total of 16 allozyme loci gave mating system parameters of tm = 0.881 (SD 0.039) and ts = 0.749 (SD 0.048), thus indicating that although predominantly outcrossing, D. cynanchoides has a mixed mating system. We draw attention to the fact that mixed mating in species with LSI is a very likely scenario, given that previous studies with diverse LSI taxa have shown that mixed cross-self pollen loads on the stigma, which is probably a common occurrence with natural pollinators, result in fruits with a proportion of selfed seeds. © Springer-Verlag 2005.

Authors: Bianchi, M; Harris, S; Gibbs, P; Prado, D

• Publication status: Published
• Journal: PLANT SYSTEMATICS AND EVOLUTION More from this journal
• Volume: 251
• Issue: 2-4
• Pages: 173-181
• Publication date: 2005-03-01
• DOI: 10.1007/s00606-004-0227-y
• EISSN: 1615-6110
• ISSN: 0378-2697
• Language: English
• Keywords: Dolichandra cynanchoides; late-acting self-incompatibility; mixed mating; mating system; Bignoniaceae