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Selection of progenies of Coffea arabica with simultaneous resistance to bacterial blight and leaf rust

This research aimed at to study C. arabica progenies as to resistances to bacterial blight "mancha aureolada", caused by Pseudomonas syringae pv. garcae, and coffee leaf rust, caused by Hemileia vastatrix. The experiment was carried out in the Centro de Produção e Experimentação de Londrina, Instituto Agronômico do Paraná. It was set in a randomized complete block design with 13 treatments (11 progenies and the controls 'IAPAR 59' and 'Catuaí Vermelho IAC 81') and three replications. The results suggest the ocurrence of new(s) pathotype(s) of P. syringae pv. garcae in Paraná State. The IAPAR 59 cultivar is an option to minimize the damage caused by P. syringae pv. garcae in areas of high incidence of this pathogen. The progeny PRFB 2-27-1/F5 (IAPAR 96095) from "Catuaí" x "Icatú" cross presented simultaneous resistance to leaf rust and to bacterial blight ("mancha aureolada"). It will be tested in future regional trials.

coffee breeding; disease resistance; cultivar; Pseudomonas syringae pv. garcae; Hemileia vastatrix


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