Data from: Evolutionary consequences of ecological factors: pollinator reliability predicts mating-system traits of a perennial plant

  • Øystein H. Opedal (Contributor)
  • Elena Albertsen (Contributor)
  • Scott Armbruster (Contributor)
  • Rocio Perez-Barrales (Contributor)
  • Mohsen Falahati-Anbaran (Contributor)
  • Christophe Pélabon (Contributor)



The reproductive-assurance hypothesis predicts that mating-system traits will evolve towards increased autonomous self-pollination in plant populations experiencing unreliable pollinator service. We tested this long-standing hypothesis by assessing geographic covariation among pollinator reliability, outcrossing rates, heterozygosity, and relevant floral traits across populations of Dalechampia scandens in Costa Rica. Mean outcrossing rates ranged from 0.16 to 0.49 across four populations, and covaried with the average rates of pollen arrival on stigmas, a measure of pollinator reliability. Across populations, genetically based differences in herkogamy (anther-stigma distance) were associated with variation in stigmatic pollen loads, outcrossing rates, and heterozygosity. These observations are consistent with the hypothesis that, when pollinators are unreliable, floral traits promoting autonomous selfing evolve as a mechanism of reproductive assurance. Extensive covariation between floral traits and mating system among closely related populations further suggests that floral traits influencing mating systems track variation in adaptive optima generated by variation in pollinator reliability.,Opedal et al. 2016, bisexual phase dataThis file contains trait measurements of bisexual-phase blossom inflorescences in the fieldOpedal_etal_2016_bisexual_phase_data_Dryad.txtOpedal et al. 2016, greenhouse dataThis file contains greenhouse trait measurements of bisexual-phase blossom inflorescencesOpedal_etal_2016_greenhouse_data.txt,
Date made available1 Jan 2017

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