Resistance to bacterial halo blight in Arabica coffee lines derivative from the genotype C1195-5-6-2 under natural infection conditions

• Published in: Crop breeding and applied biotechnology 2018-01, Vol.18 (1), p.110-115
• Main Authors: Andreazi, Elder, Sera, Gustavo Hiroshi, Sera, Tumoru, Fonseca, Inês Cristina de Batista, Carducci, Fernando Cesar, Shigueoka, Luciana Harumi, Santos, Willian Gabriel dos, Pereira, Carlos Theodoro Motta
• Format: Article
• Language: English
• Subjects: AGRONOMY; Bacteria; BIOTECHNOLOGY & APPLIED MICROBIOLOGY; Blight; Breeding; Coffea arabica; Coffea racemosa; Coffee; Coffee industry; Cultivars; Genes; Genotypes; Halo blight
• ISSN: 1518-7853; 1984-7033; 1984-7033
• DOI: 10.1590/1984-70332018v18n1n17

The aim of this study was to identify resistance to bacterial halo blight in Arabica coffee lines carrying Coffea racemosa genes. Eighteen Arabica coffee lines derivative from the genotype C1195-5-6-2, and the cultivars IAPAR 59 and IPR 99 were evaluated for resistance to bacterial halo blight in two trials carried out in field conditions, in Londrina, PR, Brazil. The cultivars Mundo Novo IAC 376-4 and Catuaí Vermelho IAC 81 were included as susceptible controls. Ten lines and the cultivar IAPAR 59 showed resistance to bacterial halo blight. The cultivar IPR 99 presented intermediate reaction, and the controls were very susceptible. This is the first study to show that lines derivative from the genotype C1195-5-6-2, which has C. racemosa genes, could be a source of resistance to bacterial halo blight in coffee breeding programs.