L. M. R. Rodrigues, S. Destéfano, L. Beriam, Mariana Ferreiro-Tonin, M. T. Braghini, Oliveiro Guerreiro Filho
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引用次数: 0
摘要
摘要:研究了联合国粮农组织咖啡代表团1964-1965年从埃塞俄比亚选育的7个野生阿拉比卡咖啡品种对18株巴西菌株和2株肯尼亚菌株丁香假单胞菌的抗性。花园和四个紫丁香属pv。烟粉虱菌株分别为细菌性光晕疫病和细菌性叶斑病的致病因子。以抗病阿拉比卡品种IPR 102和易感品种Mundo Novo IAC 376-4为对照。结果表明，埃塞俄比亚种质对巴西产丁香假单胞菌均表现出较高的抗性。但是容易受到肯尼亚菌株引起的感染，这在野生品种和实验对照中造成不同程度的严重程度。埃塞俄比亚品种也被认为对4种紫丁香假单胞菌具有抗性。在E-268通道对一株细菌的反应中，观察到易受感染的烟粉虱菌株，在严重程度量表上为1分。
Ethiopian coffee germplasm is a valuable resistance gene pool to brazilian Pseudomonas syringae PVS garcae and tabaci
ABSTRACT Seven wild accessions of Coffea arabica from Ethiopia prospected by FAO Coffee Mission 1964-1965 were investigated concerning the resistance to 18 Brazilian strains and two Kenyan strains of Pseudomonas syringae pv. garcae and four P. syringae pv. tabaci strains, causal agents of bacterial halo blight and bacterial leaf spot, respectively. The cultivars of C. arabica IPR 102, resistant to the diseases, and Mundo Novo IAC 376-4, susceptible, were used as experimental controls. Our results indicated that the Ethiopian accessions presented high levels of resistance to all Brazilian strains of P. syringae pv. garcae but were susceptible to infection caused by Kenyan strains, which causes different levels of severity in wild accessions and experimental controls. Ethiopian accessions were also considered resistant to the four P. syringae pv. tabaci strains, with low susceptibility observed, one point on the severity scale, in access E-268 in response to a strain of the bacterium.
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A Ciência e Agrotecnologia, editada a cada 2 meses pela Editora da Universidade Federal de Lavras (UFLA), publica artigos científicos de interesse agropecuário elaborados por membros da comunidade científica nacional e internacional.
A revista é distribuída em âmbito nacional e internacional para bibliotecas de Faculdades, Universidades e Instituições de Pesquisa.
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