Genética da resistência de cultivares de arroz à raça IA-1 de Pyricularia grisea

Virulence and rep-PCR Analysis of Pyricularia grisea Isolates from Two Brazilian Upland Rice Cultivars

The phenotypic and genetic diversity of 77 isolates of Pyricularia grisea collected from two upland rice cultivars, Maravilha and Primavera, was studied. Isolates exhibiting compatible reaction to cv.Primavera were incompatible to cv.Maravilha and vice versa, with the exception of six isolates that were compatible to both cultivars. The virulence of isolates from cv. Maravilha on 32 test genoty...

Adaptation du Virus de l'Echtyma Contrgieux à la Culture de Cellules de Singe

Virulence Pattern of Pyricularia grisea Isolates from Farmers’ Fields on Newly Released Upland Rice Cultivars

The virulence pattern of the isolates of Pyricularia grisea from commercial fields of the upland rice (Oryza sativa) cultivars ‘Primavera’ and ‘BRS Bonança’ was analyzed. A hundred and seventy monoconidial isolates of the pathogen virulent to ‘Primavera’ and 139 to ‘BRS Bonança’ collected from eight fields, during two years (2001-2003) were tested, under greenhouse conditions, on six newly rele...

Comportamento De Cultivares De Feijoeiro Comum À Murcha-de-curtobacterium*

Behaviour of dry bean cultivars to bacterial wilt The objective of this research was to evaluate the reaction of 40 dry bean (Phaseolus vulgaris) cultivars inoculated with two isolates of Curtobacterium flaccumfaciens pv. flacummfaciens, and the shoot dry weight of resistant and susceptible dry bean cultivars inoculated or not with this bacteria. The cultivars IAC Carioca Aruã, IAC Carioca Akyt...

GENETIC AND PHENOTYPIC CHARACTERIZATION OF ISOLATES OF Pyricularia grisea FROM THE RICE CULTIVARS EPAGRI 108 AND 109 IN THE STATE OF TOCANTINS

An epidemic of rice (Oryza sativa) blast occurred on cultivars Epagri 108 and 109 in the municipalities of Lagoa da Confusão and Duerê in the State of Tocantins, during the rice-growing season 199899. DNA fingerprinting and virulence phenotype analysis were utilized to determine the diversity of Pyricularia grisea isolates collected from these cultivars in one epidemic year. Rep-PCR analysis of...