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In wild radish, two anther traits influencing pollination showed stabilizing and disruptive selection. Selection strength and type did not differ between male and female fitness, even with increased ancestral variation.

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Area of Science:

  • Evolutionary Biology
  • Plant Reproduction
  • Population Genetics

Background:

  • Anther traits are crucial for pollination efficacy in wild radish.
  • Understanding selection pressures on these traits is key to adaptation.
  • Increased ancestral trait variation may alter selection dynamics.

Purpose of the Study:

  • To investigate the strength and type of natural selection on two correlated anther traits.
  • To determine if selection differs between male and female fitness components.
  • To assess the impact of increased ancestral trait variation on selection.

Main Methods:

  • Quantification of selection on anther traits in a wild radish population.
  • Analysis of trait variation reflecting ancestral levels.
  • Comparison of selection differentials for male and female fitness.

Main Results:

  • Stabilizing selection was observed on one anther trait.
  • Disruptive selection was identified on the second anther trait.
  • No significant difference in selection was found between male and female fitness.

Conclusions:

  • Selection on anther traits is complex, involving both stabilizing and disruptive components.
  • Male and female fitness pathways experience similar selection pressures.
  • These findings offer insights into trait adaptation processes in populations with diverse genetic backgrounds.