Fecha/hora: 31/05/2024 23:23:14

Biblioteca(s): | INIA Las Brujas.
Fecha corriente: | 29/09/2014
Fecha de la última actualización: | 29/09/2014
Autoria: | DEAHL, K.L.; PAGANI, M.C.; VILARO, F.; PÉREZ, F.M.; MORAVEC, B.; COOKE, L.R.
Afiliación: | MARIA CRISTINA PAGANI; FRANCISCO LUIS VILARO PAREJA, Instituto Nacional de Investigación Agropecuaria (INIA), Uruguay.
Título: | Characteristics of Phytophthora infestans isolates from Uruguay.
Año de publicación: | 2003
Fuente/Imprenta: | European Journal of Plant Pathology, 2003, v.109, no.3, p.277?281.
ISSN: | 0929-1873
DOI: | http://dx.doi.org/10.1023/A:1022825907389
Idioma: | Inglés

Contenido:

ABSTRACT. 
Isolates of Phytophthora infestans were obtained from late blighted plants from several potato-growing regions of Uruguay in 1998 and 1999. Of these, 25 representative isolates (4 from 1998, 21 from 1999) from the mainpotato-growing areas of the country, were characterised in terms of mating type, metalaxyl resistance, allozyme genotype, mitochondrial haplotype, RG57 fingerprint (1999 isolates only) and pathotype. All isolates proved to be A2 mating type, monomorphic and homozygous at the loci coding for glucose-6-phosphate isomerase and peptidase (Gpi 100/100, Pep 100/100) and to possess mitochondrial haplotype IIa. Metalaxyl-resistant isolates constituted 92% of the total. All the 1999 isolates possessed the same RG57 fingerprint, which was that previously reported as associated with the clonal lineage BR-1 from Brazil and Bolivia, which is also A2, Gpi 100/100, Pep 100/100. Most of the isolates displayed broad-spectrum virulence and five carried virulence to 10 of the 11 R genes tested despite the absence of R genes in commercially grown potato cultivars. It was concluded that the Uruguayan P. infestans isolates resembled isolates from neighbouring South American countries, notably Brazil, and belong to the new populations of the pathogen now predominant in many countries.
© 2003 Kluwer Academic Publishers.

Thesagro: | PAPA; RESISTENCIA A TIZONES; TIZONES.
Categoría del tema: | F30 Genética vegetal y fitomejoramiento
Registro original: | INIA Las Brujas (LB)
Ejemplares: | LB - (100117-1) - PXI - AP - DD - PP/EUROP.JR.PLANT PATHOLOGY/2003 -  -  - DIS