Crop Breeding and Applied Biotechnology (Jan 2008)
Resistance to bacterial blight in arabica coffee cultivars
Abstract
The purpose of this study was to identify sources of resistance to Pseudomonas syringae pv. garcae in arabicacoffee cultivars. The experiment was set up in March 2003. The cultivars IAPAR 59, IPR97, IPR98, IPR99, IPR100, IPR101,IPR102, IPR103, IPR104, IPR105, IPR106, IPR107 and IPR108 were evaluated under field conditions with natural diseaseoccurrence. Catuaí Vermelho IAC-99 was used as susceptible control. Young plants were evaluated in the field in January2004 based on a 1 to 5 disease severity scale, where: 1 = absence of necrotic lesions, with yellow halo; and 5 = over 45%leaves with dark necrotic lesions and dieback of vegetative shoots. The only case of complete resistance was IPR 102(Catucaí), while partial resistance is presumed in IPR 103, IPR 104, IPR 108 and IAPAR 59.
