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| Almeida,Álvaro M. R.; Piuga,Fernanda F.; Marin,Silvana R. R.; Binneck,Eliseu; Sartori,Fábio; Costamilan,Leila M.; Teixeira,Maria R. O.; Lopes,Marcelo. |
| 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... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Genotypic diversity; PCR-RFLP; RAPD; ITS sequence; Virulence. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-41582005000600005 |
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| Almeida,Álvaro M. R.; Piuga,Fernanda F.; Marin,Silvana R.R.; Kitajima,Elliot W.; Gaspar,José O.; Oliveira,Thalita G. de; Moraes,Tanara G. de. |
| Stunting and stem necrosis were noticed in soybeans (Glycine max) grown in 2000/2001 in West Central Brazil the same condition was also observed in the following year in plantations as far as 2,000 km from the initial area. Based on transmission (mechanical, graft, insect vector), purification and serology, electron microscopy and molecular studies the causal agent was determined to be a whitefly-borne carlavirus which is possibly related to Cowpea mild mottle virus (CpMMV). |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cowpea mild mottle virus; Whitefly; Bemisia tabaci biotype B.. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-41582005000200016 |
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