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- W4245692071 abstract "Abstract Pathogens have dramatic effects in natural and agricultural plant systems. There is evidence of evolutionary changes in disease susceptibility as a consequence of climate change, but we know little about the underlying genetic basis of this evolution. To address this, we took advantage of a historical seed collection of a Brassica rapa population, which we previously demonstrated evolved an increase in disease susceptibility to a necrotrophic fungal pathogen following a drought. Previously, we combined a resurrection experiment with genome-wide sequencing of 124 pooled ancestral and descendant plants. In this study, we found that well-characterized necrotrophic fungal pathogen response (NFPR) genes were differentiated between ancestors and descendants, with several of them identified as extreme F ST outliers. The jasmonic acid (JA) signaling pathway in particular seemed to underlie the evolution of disease susceptibility, in addition to its well characterized role in plastic disease response. Next, we identified a list of 260 genes that are both NFPR genes and are differentially expressed in response to drought, based on publicly available data. We found evidence that five of these genes evolved between ancestors and descendants, suggesting that the drought acted as the evolutionary driver, and that the accompanying increase in disease susceptibility may have been a consequence of genetic pleiotropy. Our study provides evidence that for this population, standing natural variation in NFPR genes is affected by natural selection related to climate change. Our results reveal potentially important candidates that may underlie trait evolution in both crops and natural systems. Additionally, this trade-off between adaptation to biotic and abiotic stresses is an example of how climate change can have diverse and unexpected consequences." @default.
- W4245692071 created "2022-05-12" @default.
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- W4245692071 date "2019-10-21" @default.
- W4245692071 modified "2023-09-26" @default.
- W4245692071 title "Evolution of pathogen response genes associated with increased disease susceptibility during adaptation to an extreme drought in a Brassica rapa plant population" @default.
- W4245692071 doi "https://doi.org/10.21203/rs.2.16267/v1" @default.
- W4245692071 hasPublicationYear "2019" @default.
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