Academic
Publications
Herkogamy and Mating Patterns in the Self-compatible Daffodil Narcissus longispathus

Herkogamy and Mating Patterns in the Self-compatible Daffodil Narcissus longispathus,O ONICA MEDRANO,CARLOS M. HERRERA,SPENCER C. H. BARRETT

Herkogamy and Mating Patterns in the Self-compatible Daffodil Narcissus longispathus   (Citations: 9)
BibTex | RIS | RefWorks Download
Background and Aims Floral design in self-compatible plants can influence mating patterns. This study invest- igated Narcissus longispathus, a self-compatible bee-pollinated species with wide variation in anther-stigma separation (herkogamy), to determine the relationship between variation in this floral trait and the relative amounts of cross- and self-fertilization. Methods Anther-stigma separation was measured in the field in six populations of N. longispathus from south- eastern Spain. Variation in herkogamy during the life of individual flowers was also quantified. Multilocus out- crossing rates were estimated from plants differing in herkogamy using allozyme markers. Key ResultsAnther-stigmaseparationvariedconsiderablyamongflowerswithinthesixpopulationsstudied(range = 1-10 mm). This variation was nearly one order of magnitude larger than the slight, statistically non-significant developmentalvariationduringthelifespanofindividualflowers.Estimatesofmultilocusoutcrossingratefordifferent herkogamy classes (tm range = 049-076) failed to reveal a monotonic increase with increasing herkogamy. Conclusions It is suggested that the lack of a positive relationship between herkogamy and outcrossing rate, a result that has not been previously documented for other species, could be mostly related to details of the foraging behaviour of pollinators.
Published in 2005.
Cumulative Annual
View Publication
The following links allow you to view full publications. These links are maintained by other sources not affiliated with Microsoft Academic Search.
Sort by: