## Selection on floral traits through male fertility in a natural plant population

2008
##### Authors
Burczyk, Jaroslaw
Journal article
##### Published in
Evolutionary Ecology ; 22 (2008), 1. - pp. 39-54. - ISSN 0269-7653. - eISSN 1573-8477
##### Abstract
Most studies on selection in plants estimate female fitness components and neglect male mating success, although the latter might also be fundamental to understand adaptive evolution. Information from molecular genetic markers can be used to assess determinants of male mating success through parentage analyses. We estimated paternal selection gradients on floral traits in a large natural population of the herb Mimulus guttatus using a paternity probability model and maximum likelihood methods. This analysis revealed more significant selection gradients than a previous analysis based on regression of estimated male fertilities on floral traits. There were differences between results of univariate and multivariate analyses most likely due to the underlying covariance structure of the traits. Multivariate analysis, which corrects for the covariance structure of the traits, indicated that male mating success declined with distance from and depended on the direction to the mother plants. Moreover, there was directional selection for plants with fewer open flowers which have smaller corollas, a smaller anther–stigma separation, more red dots on the corolla and a larger fluctuating asymmetry therein. For most of these traits,however, there was also stabilizing selection indicating that there are intermediate optima for these traits. The large number of significant selection gradients in this study shows that even in relatively large natural populations where not all males can be sampled, it is possible to detect significant paternal selection gradients, and that such studies can give us valuable information required to better understand adaptive plant evolution.
##### Subject (DDC)
570 Biosciences, Biology
##### Keywords
Isozymes,Natural selection,Mating system,Paternity,Pollen dispersal,Reproduction
##### Cite This
ISO 690VAN KLEUNEN, Mark, Jaroslaw BURCZYK, 2008. Selection on floral traits through male fertility in a natural plant population. In: Evolutionary Ecology. 22(1), pp. 39-54. ISSN 0269-7653. eISSN 1573-8477. Available under: doi: 10.1007/s10682-007-9157-9
BibTex
@article{vanKleunen2008Selec-12545,
year={2008},
doi={10.1007/s10682-007-9157-9},
title={Selection on floral traits through male fertility in a natural plant population},
number={1},
volume={22},
issn={0269-7653},
journal={Evolutionary Ecology},
pages={39--54},
author={van Kleunen, Mark and Burczyk, Jaroslaw}
}

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