Data/hora: 10/06/2024 17:12:05

Provedor de dados: | 102
País: | Brazil
Título: | Expression of resistance in rice hybrids to Pyricularia grisea
Autores: | PRABHU,ANNE S.; GUIMARÃES,ELCIO P.; FILIPPI,MARTA C.; ARAUJO,LEILA G.; CUTRIM,VERIDIANO A.
Data: | 2002-09-01
Ano: | 2002
Palavras-chave: | Magnaporthe grisea; Rice blast; Hybrid rice; Partial resistance; Oryza sativa.
Resumo: | Thirty-nine rice (Oryza sativa) hybrids and their restorers were assessed for vertical resistance to Pyricularia grisea in the rice blast nursery, and in artificial inoculation tests with two pathotypes, under controlled greenhouse conditions. The hybrids were developed from cytoplasmic genetic male sterile lines 046I and IR 58025A, derived from WA cytoplasm. In the rice blast nursery all hybrids showed susceptible reaction varying from 5 to 9. Compatible and incompatible leaf blast reactions of hybrids to two pathotypes, IC-1 and IB-45, were observed in inoculation tests. A majority of the hybrids were resistant when the restorer was resistant. However, seven of the 25 F1 hybrids exhibited susceptible reactions even when one of the parents was resistant to a pathotype. The partial resistance of 11 hybrids and their parents that showed compatible reactions to two pathotypes was analyzed. Differential interaction between isolates and genotypes was observed for partial resistance in relation to both disease severity and lesion number indicating the specific nature of partial resistance.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-41582002000500003
Editor: | Sociedade Brasileira de Fitopatologia
Relação: | 10.1590/S0100-41582002000500003
Formato: | text/html
Fonte: | Fitopatologia Brasileira  v.27 n.5 2002
Fonte: | info:eu-repo/semantics/openAccess