Data/hora: 14/06/2024 04:01:24

Biblioteca(s): | Embrapa Mandioca e Fruticultura.
Data corrente: | 24/07/2017
Data da última atualização: | 24/07/2017
Autoria: | VILAS BOAS, S. A.; OLIVEIRA, S. A. S. de; BRAGANÇA, C. A. D.; RAMOS, J. B.; OLIVEIRA, E. J. de.
Afiliação: | SANDIELLE ARAÚJO VILAS BOAS, UFRB; SAULO ALVES SANTOS DE OLIVEIRA, CNPMF; CARLOS AUGUSTO DÓREA BRAGANÇA, UFRB; JULIANA BARROS RAMOS, UFRB; EDER JORGE DE OLIVEIRA, CNPMF.
Título: | Survey of fungi associated with cassava root rot from different producing regions in Brazil.
Ano de publicação: | 2017
Fonte/Imprenta: | Scientia Agricola, v.74, n.1, p.60-67, , January/February 2017.
ISSN: | 1678-992X
DOI: | 1590/0103-9016-2015-0366
Idioma: | Inglês
Conteúdo: | Although root rot is one of the major diseases affecting Brazilian cassava (Manihot esculenta Crantz.), little is known about the diversity of root rot pathogens. In this study, dis-eased plants exhibiting root rot symptoms were collected from cassava-producing regions in five Brazilian states: Bahia, Sergipe, Paraíba, Maranhão, Tocantins, and Paraná. Seventy isolates were obtained and assigned to species complexes based on rDNA?s ITS (internal transcribed spacer of the ribosomal DNA) region (ITS1, ITS2 and 5.8S). A total of seven species complexes was found belonging to the genus Fusarium (56/74), followed by Lasiodiplodia (8/74), Neos-cytalidium (6/74), and Diaporthe/Phomopsis complex (2/74), Phytophthora, and Corallomyce-tella (1/74 each). These species were distributed differently according to sample locations and states, but overall, the F. solani species complex (FSSC) was the most prevalent. A number of phylogenetic lineages had not been previously reported as being associated with cassava-root rot disease, such as: F. graminearum (FGSC), F. incarnatum-equiseti (FIESC) and F. chlamydos-porum (FCSC) complexes, and a phylogenetic lineage most closely related to P. phaseolorum. Results suggest the need to improve knowledge of the species associated with cassava, includ-ing multilocus phylogeny for a more specific characterization, and differences in the resistance background associated with these species, as a strategy to incorporate resistance to multiple pathogens in cassava breeding programs.
Thesagro: | Mandioca.
Thesaurus Nal: | Cassava.
Categoria do assunto: | --
Registro original: | Embrapa Mandioca e Fruticultura (CNPMF)
Exemplares: | CNPMF - (31973-1) - UPC - AP - DD - Publicação digital -  -  - DIS