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

Bénédicte Pariaud¹  Femke van den Berg²  Frank van den Bosch²  Stephen J. Powers²  Oliver Kaltz³ 

[1] UMR1290 Bioger, INRA, BP 01, Thiverval Grignon, France;Department of Computational and Systems Biology, Rothamsted Research, Harpenden, Hertfordshire AL5 2JQ, UK;Institut des Sciences de l'Evolution, UMR CNRS-UM2-IRD5554, CC 065, Université Montpellier 2, Place E. Bataillon, 34095 Montpellier, Cedex 05, France

关键词: genetic correlation;    latent period;    leaf rust;    sporulation capacity;    Triticum aestivum;    Wheat;   

DOI  :  10.1111/eva.12000

来源: Wiley

【 摘 要 】

Abstract

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.

【 授权许可】

CC BY-NC   
© 2012 The Authors. Evolutionary Applications published by Blackwell Publishing Ltd.

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.