A genome-wide association study identifies <i>Arabidopsis thaliana</i> genes that contribute to differences in the outcome of infection with two <i>Turnip mosaic potyvirus</i> strains that differ in their evolutionary history and degree of host specialization.

First, highly significant differences exist between the two viruses, with TuMV-G showing larger median values than TuMV-S for the three traits (median ±IQR for TuMV-G vs TuMV-S, respectively: symptoms severity 2.354 ±3.000 vs 1.779 ±4.000; AUDPS 11.692 ±8.822 vs 11.162 ±9.447; and infectivity 0.950 ±0.000 vs 0.936 ±0.000) ( Fig. 2 ).

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