Resistance to bacterial blight in arabica coffee cultivars

D.S. Ito, T. Sera, G.H. Sera, L.D. Grossi, F.S. Kanayama
2008 Crop Breeding and Applied Biotechnology  
Resistance to bacterial blight in arabica coffee cultivars Crop Breeding and Applied Biotechnology ABSTRACT -The purpose of this study was to identify sources of resistance to Pseudomonas syringae pv. garcae in arabica coffee 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 disease occurrence. Catuaí Vermelho IAC-99 was used
more » ... as susceptible control. Young plants were evaluated in the field in January 2004 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.
doi:10.12702/1984-7033.v08n02a01 fatcat:lzmb6ak3tvf2zjl64qn2quj4sa