Shared influence of pathogen and host genetics on a trade-off between latent period and spore production capacity in the wheat pathogen, Puccinia triticina
Article first published online: 7 SEP 2012
© 2012 The Authors. Evolutionary Applications published by Blackwell Publishing Ltd.
This is an open access article under the terms of the Creative Commons Attribution-NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.
Volume 6, Issue 2, pages 303–312, February 2013
How to Cite
Pariaud, B., van den Berg, F., van den Bosch, F., Powers, S. J., Kaltz, O. and Lannou, C. (2013), Shared influence of pathogen and host genetics on a trade-off between latent period and spore production capacity in the wheat pathogen, Puccinia triticina. Evolutionary Applications, 6: 303–312. doi: 10.1111/eva.12000
- Issue published online: 18 FEB 2013
- Article first published online: 7 SEP 2012
- Manuscript Accepted: 11 JUL 2012
- Manuscript Received: 17 APR 2012
- ISPG ‘MATHEMATICAL AND COMPUTATIONAL BIOLOGY’
- genetic correlation;
- latent period;
- leaf rust;
- sporulation capacity;
- Triticum aestivum ;
Crop pathogens are notorious for their rapid adaptation to their host. We still know little about the evolution of their life cycles and whether there might be trade-offs between fitness components, limiting the evolutionary potential of these pathogens. In this study, we explored a trade-off between spore production capacity and latent period in Puccinia triticina, a fungal pathogen causing leaf rust on wheat. Using a simple multivariate (manova) technique, we showed that the covariance between the two traits is under shared control of host and pathogen, with contributions from host genotype (57%), pathogen genotype (18.4%) and genotype × genotype interactions (12.5%). We also found variation in sign and strength of genetic correlations for the pathogen, when measured on different host varieties. Our results suggest that these important pathogen life-history traits do not freely respond to directional selection and that precise evolutionary trajectories are contingent on the genetic identity of the interacting host and pathogen.