Patterns of reproductive isolation in Nolana (Chilean bellflower)

Evolution. 2012 Aug;66(8):2628-36. doi: 10.1111/j.1558-5646.2012.01607.x. Epub 2012 Mar 19.


We examined reproductive isolating barriers at four postmating stages among 11 species from the morphologically diverse genus Nolana (Solanaceae). At least one stage was positively correlated with both genetic and geographic distance between species. Postzygotic isolation was generally stronger and faster evolving than postmating prezygotic isolation. In addition, there was no evidence for mechanical isolation, or for reproductive character displacement in floral traits that can influence pollinator isolation. In general, among the potential isolating stages examined here, postzygotic barriers appear to be more effective contributors to reducing gene flow, including between sympatric species.

MeSH terms

  • Chile
  • Evolution, Molecular
  • Genetic Speciation*
  • Peru
  • Plant Proteins / genetics
  • Reproduction
  • Sequence Alignment
  • Sequence Analysis, DNA
  • Solanaceae / genetics
  • Solanaceae / physiology*
  • Species Specificity


  • Plant Proteins