Present address: Laboratoire d'Evolution et Systématique des Végétaux, Bat 362, Université Paris Sud, 91405 Orsay Cedex, France
Sex allocation in an hermaphroditic plant: the case of gynodioecy in Thymus vulgaris L.
Article first published online: 13 DEC 2002
Journal of Evolutionary Biology
Volume 5, Issue 2, pages 189–203, March 1992
How to Cite
Atlan, A., Gouyon, P. H., Fournial, T., Pomente, D. and Couvet, D. (1992), Sex allocation in an hermaphroditic plant: the case of gynodioecy in Thymus vulgaris L. Journal of Evolutionary Biology, 5: 189–203. doi: 10.1046/j.1420-9101.1992.5020189.x
- Issue published online: 13 DEC 2002
- Article first published online: 13 DEC 2002
- Received 14 January 1991; accepted 22 April 1991.
- Cited By
- Resource allocation;
- sex allocation;
- pollen production;
Resource allocation to male and female functions was investigated in Thymus vulgaris L. (thyme), a gynodioecious species, in which females produce twice as many seeds as hermaphrodites. Negative correlations were found between male and female fertility of hermaphrodites, providing evidence of a trade-off. There was a high variability in sexual investment, some of the hermaphrodites functioning almost as males, and others almost as females. Estimation of the relative cost of male and female gametes showed that the female advantage in seed production was mainly due to reallocation of the resources not allocated to male function into female function. The determination of sex allocation was shown to have a genetic component, and there were some evidence that an interaction between nuclear and cytoplasmic genomes was involved.