Inheritance of resistance to Xanthomonas campestris pv phaseoli in tetary bean (Phaseolus acutifolius)

Summary The F1, F2 and F3 from two crosses within Phaseolus acutifolius were exposed to Xanthomonas campestris pv phaseoli to analyse the inheritance of resistance. The resistant parent, PI 319.443, gave a hypersensitive reaction in leaves and pods with small necrotic lesions. Based on the resistance of F1, the segregation in F2 and the reaction of F3 plants and lines, it is concluded that resistance in leaves and pods is governed by one dominant gene. Comparisons are made with the resistance to X. campetris in P. vulgaris.