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Genetic variation among pathogens causing "Helminthosporium" diseases of rice, maize and wheat
Provedor de dados: 102
Autores: WEIKERT-OLIVEIRA,RITA C. B.; RESENDE,M. APARECIDA DE; VALÉRIO,HENRIQUE M.; CALIGIORNE,RACHEL B.; PAIVA,EDILSON.
Twenty isolates of four fungal species, agents of "Helminthosporium" diseases in cereals, were collected from different regions: nine Bipolarisoryzae isolated from rice (Oryza sativa), seven B.sorokiniana from wheat (Triticum aestivum), two B. maydis, and two Exserohilumturcicum from maize (Zea mays). The strains were compared by PCR-RFLP and RAPD analysis. Size polymorphism among the isolates in the ITS region comprising the 5.8 S rDNA indicated genetic differences among the isolates, while a UPGMA phenogram constructed after the digestion of this region with restriction enzymes showed inter- and intra-specific polymorphism. The RAPD profiles indicated an expressive level of polymorphism among different species, compared with a low level of polymorphism...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bipolaris sorokiniana; Bipolaris oryzae; Bipolaris maydis; Exserohilum turcicum; PCR-RFLP; RAPD.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-41582002000600015