use of local rice cultivars as additional differentials to identify pathotypes of pyricularia oryzae
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2011
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Abstract
Eight additional rice cultivars as differentials were selected to identify pathotypes occurring in the Tocantins State. They were BRS Jaburu, BRS Taim, BRS Biguá, BR IRGA-417, Epagri 109, Javaé, Metica-1 and Supremo. These differentials were used in addition to the international set to determine the pathogenic diversity of 193 Pyricularia oryzae isolates collected during 1994-2002 from irrigated rice cultivars. They were conserved in Pyricularia culture collection of Embrapa Rice and Bean Research center. From 193 P. oryzae isolates 38 pathotypes were identified based on leaf blast reactions of international set and 29 pathotypes based on these additional differentials. The predominant pathotypes (TI-1, TG-2, TD-15 and TF-2) were represented by 53% of the tested isolates. The major international pathotypes (IB-45, IB-41, II-1 and ID-13) were represented by 43% of the isolates tested. The virulence pattern of 28 isolates belonging to the pathotype IB-45 was further differentiated into nine local pathotypes using additional set of differentials. The irrigated rice cultivars used as additional differentials serve as complementary set to identify pathotypes of interest for breeding blast resistant cultivars for Tocantins State.
| Reference Key |
silva2011bragantiause
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| Authors | ;Gisele Barata da Silva;Leila Garcês de Araújo;Valácia Lemes da Silva Lobo;Anne Sitarama Prabhu;Marcela Cristiane Ferreira Rêgo;Eduardo Tavares Paes;Marta Cristina Corsi de Filippi |
| Journal | revista espanola de salud publica |
| Year | 2011 |
| DOI |
10.1590/S0006-87052011000400019
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