Zhan, Jiasui
- Institutionen för skoglig mykologi och växtpatologi, Sveriges lantbruksuniversitet
- Fujian Agriculture and Forestry University
Sammanfattning
Expected global changes in environmental conditions underline the need for a better understanding of genetic variation in ecological traits and their strategies of adaptation to the stresses. In this study, evolutionary mechanisms and processes of UV adaptation in plant pathogens were investigated by combining statistical genetics, physiological assays, and common garden experiment approaches in an assessment of the potato late blight pathogen, Phytophthora infestans, sampled from various geographic locations in China. We found spatial divergence caused by diversifying selection in UV tolerance among P. infestans populations. Local UV radiation was the driving force of selection as indicated by a positive correlation between UV tolerance in P. infestans populations and the altitude of collection sites. Plasticity accounted for 68% of population variation while heritability was negligible, suggesting temporary changes in gene expression and/or enzymatic activity play a more important role than permanent modification of gene structure in the evolution of UV adaptation. This adaptation strategy may explain the lack of fitness penalty observed in genotypes with higher UV tolerance.
Nyckelord
aggressiveness; genetic differentiation; pathogen evolution; phenotypic plasticity; Phytophthora infestans; Q(ST)/F-ST analysis; ultraviolet adaptation
Publicerad i
Evolutionary applications
2019, volym: 12, nummer: 3, sidor: 415-424
Utgivare: WILEY
SLU författare
Associerade SLU-program
SLU Nätverk växtskydd
Globala målen (SDG)
SDG13 Bekämpa klimatförändringarna
UKÄ forskningsämne
Evolutionsbiologi
Publikationens identifierare
- DOI: https://doi.org/10.1111/eva.12722
Permanent länk till denna sida (URI)
https://res.slu.se/id/publ/99055