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AOBPreview published online on June 10, 2009
Annals of Botany, doi:10.1093/aob/mcp141
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© The Author 2009. Published by Oxford University Press on behalf of the Annals of Botany Company. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

INVITED REVIEW

Recent advances in the study of gynodioecy: the interface of theory and empiricism

David E. McCauley1,* and Maia F. Bailey2

1 Department of Biological Sciences, Vanderbilt University, Nashville, TN 37235, USA
2 Biology Department, Providence College, Providence, RI 02918 USA

* For correspondence. E-mail david.e.mccauley{at}vanderbilt.edu

Received: 19 February 2009    Returned for revision: 25 March 2009    Accepted: 29 April 2009   

Background: In this review we report on recent literature concerned with studies of gynodioecy, or the co-occurrence of female and hermaphrodite individuals in natural plant populations. Rather than review this literature in its entirety, our focus is on the interplay between theoretical and empirical approaches to the study of gynodioecy.

Scope: Five areas of active inquiry are considered. These are the cost of restoration, the influence of population structure on spatial sex-ratio variation, the influence of inbreeding on sex expression, the signature of cyto-nuclear coevolution on the mitochondrial genome, and the consequences of mitochondrial paternal leakage.

Conclusions: Recent advances in the study of gynodioecy have been made by considering both the ecology of female:hermaphrodite fitness differences and the genetics of sex expression. Indeed theory has guided empiricism and empiricism has guided theory. Future advances will require that some of the methods currently available only for model organisms be applied to a wider range of species.

Key words: Breeding system, gynodioecy, cytoplasmic male sterility, restoration, sex ratio, inbreeding, population structure, genetic conflict


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