Data/hora: 13/06/2024 08:08:00

Provedor de dados: 	102	
País: 	Brazil	
Título: 	Pathogenicity, molecular characterization, and cercosporin content of Brazilian isolates of Cercospora kikuchii	
Autores: 	Almeida,Álvaro M. R.; Piuga,Fernanda F.; Marin,Silvana R. R.; Binneck,Eliseu; Sartori,Fábio; Costamilan,Leila M.; Teixeira,Maria R. O.; Lopes,Marcelo.	
Data: 	2005-12-01	
Ano: 	2005	
Palavras-chave: 	Genotypic diversity; PCR-RFLP; RAPD; ITS sequence; Virulence.	
Resumo: 	Cercospora kikuchii, involved with the defoliation of soybean (Glycine max) plants, is normally associated with Septoria glycines in late season. Seventy-two isolates from different regions in Brazil, obtained mainly from purple stained seeds, showed phenotypic variation. Cercosporin content and rate of colony growth was higly variable among isolates. A strong correlation between cercosporin content and virulence was identified. Genetic variation among and within populations was evaluated based on 86 RAPD loci. The RAPD analysis clustered all isolates into seven groups. No relationship was observed between RAPD groups and geographic origin or cercosporin content. The sequence of the internal spacer regions (ITS1-5.8S-ITS2) from 13 isolates chosen according to the previous RAPD and clustering analysis showed high similarity (97%-100%) to the GenBank sequences of C. kikuchii (AY266160, AY266161, AY152577 and AF291708). It is clear from this work that Brazilian isolates of C. kikuchii from different geographic regions, are variable in relation to virulence, RAPD profiles and cercosporin content. Cercosporin content could be a good parameter for choosing an adequate isolate for screening resistant or tolerant cultivars. Considering that this pathogen is easily seed-borne, findings are expected to show the same haplotypes in different regions. Migration could be favoured by infected seeds as demonstrated by RAPD analysis.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-41582005000600005	
Editor: 	Sociedade Brasileira de Fitopatologia	
Relação: 	10.1590/S0100-41582005000600005	
Formato: 	text/html	
Fonte: 	Fitopatologia Brasileira  v.30 n.6 2005	
Fonte: 	info:eu-repo/semantics/openAccess