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

van Kleunen, Mark; Burczyk, Jaroslaw (2008). Selection on floral traits through male fertility in a natural plant population. Evolutionary ecology, 22(1), pp. 39-54. London: Chapman and Hall 10.1007/s10682-007-9157-9

Full text not available from this repository. (Request a copy)

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.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Department of Biology > Institute of Plant Sciences (IPS) > Plant Ecology
08 Faculty of Science > Department of Biology > Institute of Plant Sciences (IPS)

UniBE Contributor:

van Kleunen, Mark

ISSN:

0269-7653

Publisher:

Chapman and Hall

Language:

English

Submitter:

Peter Alfred von Ballmoos-Haas

Date Deposited:

04 Oct 2013 15:08

Last Modified:

13 Jun 2014 14:49

Publisher DOI:

10.1007/s10682-007-9157-9

Web of Science ID:

000251651100003

URI:

https://boris.unibe.ch/id/eprint/30132 (FactScience: 172141)

Actions (login required)

Edit item Edit item
Provide Feedback