Data/hora: 10/06/2024 08:03:48

Provedor de dados: | 102
País: | Brazil
Título: | Resistance spectra of wheat cultivars and virulence diversity of Magnaporthe grisea isolates in Brazil
Autores: | Urashima,Alfredo S.; Lavorent,Norberto A.; Goulart,Augusto C. P.; Mehta,Yeshwant R.
Data: | 2004-10-01
Ano: | 2004
Palavras-chave: | Pyricularia grisea; Triticum aestivum; Resistance; Control.
Resumo: | Seventy-two monoconidial isolates of Magnaporthe grisea were obtained from the States of Mato Grosso do Sul and Paraná. The isolates were inoculated on seedlings of 20 wheat (Triticum aestivum) cultivars under greenhouse conditions. The virulence diversity of M. grisea was assessed based on compatible and incompatible reactions of leaf blast on wheat cultivars. Fifty-four distinct virulence patterns were identified on test cultivars among the isolates collected from the two wheat growing States. Sixteen of these isolates corresponding to 22.2% showed similar virulence pattern. None of the wheat cultivars was resistant to all isolates of M. grisea, but the cultivars differed in degree of resistance as measured by the relative spectrum of resistance (RSR) and disease index (DI). Among the cultivars the RSR ranged from 0 to 53.3% and DI from 0.4662 to 0.9662 (0 to 1 scale). The wheat cultivar BR18 exhibited a broad resistance spectrum in relation to the rest of the tested cultivars to the isolates of M. grisea, and can be used in wheat resistance breeding.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-41582004000500007
Editor: | Sociedade Brasileira de Fitopatologia
Relação: | 10.1590/S0100-41582004000500007
Formato: | text/html
Fonte: | Fitopatologia Brasileira  v.29 n.5 2004
Fonte: | info:eu-repo/semantics/openAccess