期刊
AUSTRALASIAN PLANT PATHOLOGY
卷 40, 期 4, 页码 442-447出版社
SPRINGER
DOI: 10.1007/s13313-011-0056-8
关键词
Eucalyptus; Rust; Resistance gene; Variability; Race
资金
- CNPq (National Counsel of Technological and Scientific Development)
- FAPEMIG (Fundacao de Amparo a Pesquisa do Estado de Minas Gerais)
Rust caused by Puccinia psidii is one the most destructive diseases of Eucalyptus. Management of the disease is achieved through selection of resistant host genotypes. Recently, eucalypt plants from clone BA6021, resistant to P. psidii isolate race-1, were infected by rust in Brazil. Microsatellite profiles of infected plants confirmed that the host was indeed clone BA6021. In pathogenicity tests, the resistant clones BA6021 and G21 (which carry the resistance gene Ppr-1) were found susceptible to the newly discovered isolate EUBA-1, indicating a new biotype of the pathogen. These results show that the isolate EUBA-1 and other potentially unrecognized pathogen races should be given strong consideration for eucalypt breeding programs aimed rust resistance.
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