This paper builds on the authors’ previously published method to identify candidate R genes in N. benthamianafor a given target effector. In this paper, they employ this method to determine the R gene(s) required to confer recognition to the Ptoeffector HopQ1, which “is the sole effector [from Pto]… recognized in both Nb andNicotiana tabacum” (lines 96- 97). They argue that the widespread conservation of HopQ1 among phytopathogenic bacteria means that, “the identification of R proteins able to recognize [this] effector is potentially valuable to achieve resistance to a wide range of plant pathogens” (lines 106- 107).