Data/hora: 24/06/2024 16:54:45

Biblioteca(s): | Embrapa Mandioca e Fruticultura.
Data corrente: | 07/07/2014
Data da última atualização: | 25/05/2023
Autoria: | COSTA, S. N.; BRAGANÇA, C. A. D.; RIBEIRO, L. R.; AMORIM, E. P.; OLIVEIRA, S. A. S. de; RODRIGUEZ, M. A. D.; BARBOSA, F. F. L.; HADDAD, F.
Afiliação: | S. N. COSTA, UFRB; C. A. D. BRAGANÇA, CAPES; L. R. RIBEIRO, UFRB; EDSON PERITO AMORIM, CNPMF; SAULO ALVES SANTOS DE OLIVEIRA, CNPMF; MIGUEL ANGEL DITA RODRIGUEZ, CNPMF; FRANCISCO FERRAZ LARANJEIRA BARBOSA, CNPMF; FERNANDO HADDAD, CNPMF.
Título: | Genetic structure of Fusarium oxysporum f. sp. cubense in different regions from Brazil.
Ano de publicação: | 2014
Fonte/Imprenta: | Plant Pathology, 2014.
ISSN: | 0032-0862
DOI: | 10.1111/ppa.12242
Idioma: | Inglês
Conteúdo: | Panama disease, caused by Fusarium oxysporum f. sp. cubense (Foc), is ranked among the most destructive diseases of banana. The use of resistant varieties is the most desirable and effective control measure. Information on the pathogen population structure is essential, as durability of the resistance and effective cultivar deployment are strongly linked to this structure. In this study, 214 Foc isolates from different banana producing states in three regions of Brazil (north- eastern, southeastern and southern) were analysed. Initially, nine microsatellite markers (SSR) were tested, which revealed 52 distinct haplotypes distributed in the different geographical regions and cultivars. While AMOVA analysis showed that 68 01% of the total variation occurred within states, correlation between genetic and geographical dis- tances was only found in the southern region. Results indicated that isolates from different states comprise a single population, which is predominantly clonal. When isolates representing different haplotypes were inoculated in four banana cultivars, differences in severity were found, with the high severity values being caused by isolates from haplo- types H7, H31 and H41. The diversity found here points to the need for additional studies, as this characteristic may be related to Foc?s evolutionary potential and possibly to its ability to overcome the resistance from breeding pro- gramme-generated cultivars. This is the most comprehensive study on population biology of Foc in Brazil.
Palavras-Chave: | Disorders; Plant diseases.
Thesagro: | Doença de planta; Fusarium.
Thesaurus Nal: | Fusarium oxysporum f. sp. cubense.
Categoria do assunto: | --
Registro original: | Embrapa Mandioca e Fruticultura (CNPMF)
Exemplares: | CNPMF - (30123-1) - UPC - AP - DD - Publicação digital -  -  - DIS