Low selfing in a mass‐flowering, endangered perennial, Eryngium alpinum L. (Apiaceae)
- 1 May 2003
- journal article
- Published by Wiley in American Journal of Botany
- Vol. 90 (5), 716-723
- https://doi.org/10.3732/ajb.90.5.716
Abstract
We investigated the reproductive ecology of an endangered alpine species, Eryngium alpinum L., to determine its selfing rate and to propose possible mechanisms that may shape its breeding system. Whereas pollinators' foraging behavior suggested a high potential for geitonogamy (70% of the flights occur within plants), microsatellite analyses of seed progenies demonstrated that plants are primarily outcrossing (outcrossing rate [tm] = 0.65, 0.96, and 1 in three populations). Given the relatively long pollen viability (at least 4-5 d) and the high number of simultaneously opened flowers on each plant, protandry is not sufficient to eliminate selfing. Second, controlled crosses demonstrated not only auto-fertility, but also partial self-incompatibility. Partial self-incompatibility is probably due to the competitive advantage of cross vs. self-pollen, and, together with protandry, could lead the species to selfing as a reproductive assurance. These results are encouraging for the maintenance of large populations. However, higher selfing was observed in a small population that could suffer inbreeding depression, as observed on experimentally selfed seeds. Thus, these populations should be carefully monitored. Finally, this study shows how molecular markers and field experiments may complement each other in our reaching a global understanding of mating patterns.Keywords
This publication has 49 references indexed in Scilit:
- Isolation and characterization of microsatellites in a perennial Apiaceae, Eryngium alpinum L.Molecular Ecology Notes, 2002
- Experimental Demonstration of an Allee Effect in American GinsengConservation Biology, 2001
- Variation in self-fertility, inbreeding depression and levels of inbreeding in four Cyclamen speciesJournal of Evolutionary Biology, 1999
- Inbreeding and Extinction: Island PopulationsConservation Biology, 1998
- Ecology and evolution of plant matingTrends in Ecology & Evolution, 1996
- Geitonogamy: The neglected side of selfingTrends in Ecology & Evolution, 1993
- Self- and Cross-Fertilization in Plants. II. The Selection of Self- FertilizationInternational Journal of Plant Sciences, 1992
- Mass-Action Models of Plant Mating Systems: The Evolutionary Stability of Mixed Mating SystemsThe American Naturalist, 1991
- A model for the evolution of self-fertilization and vegetative reproductionJournal of Theoretical Biology, 1976
- AVERAGE EXCESS AND AVERAGE EFFECT OF A GENE SUBSTITUTIONAnnals of Eugenics, 1941