Races of isolates of Plasmopara halstedii from Spain and studies on their virulence

Races of isolates of Plasmopara halstedii from Spain and studies on their virulence

5 pages; 5 tables

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Bibliographic Details
Main Authors: Molinero-Ruiz, Leire, Domínguez, Juan, Melero-Vara, José M.
Format: artículo biblioteca
Language:English
Published: American Phytopathological Society 2002
Subjects:Genetic resistance, Helianthus annuus,
Online Access:http://hdl.handle.net/10261/21633
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spelling dig-ias-es-10261-216332018-08-03T07:45:24Z Races of isolates of Plasmopara halstedii from Spain and studies on their virulence Molinero-Ruiz, Leire Domínguez, Juan Melero-Vara, José M. Genetic resistance Helianthus annuus 5 pages; 5 tables Plants infected with downy mildew were collected from 1994 to 2000 in sunflower fields in Spain. The race of 102 bulk isolates of Plasmopara halstedii obtained from them was determined by inoculation of sunflower lines traditionally used as differentials for characterization of the pathogen. Nine different races of the fungus were determined. Although race 1 was most common and was the only one found in central Spain, races 4, 6, and 7 were widespread in southern Spain. The results allowed the identification of a new race of the pathogen, race 10, and of a race not previously reported in Europe, race 8. According to the proposal of a new system for characterization of the isolates of P. halstedii in the late 1990s, Coded Virulence Formulae (CVF) were assigned to bulk isolates and single-sporangium (ss) isolates obtained from them. The CVF of the bulk isolates (CVFi) did not always fit with the previous designation. Similarly, ss isolates from the same bulk isolate exhibited different CVF, not only among themselves, but also compared with the CVF of the source isolate. Although a revision of the differential lines used to perform the racial characterization of fungal isolates seems to be needed, the occurrence of a diversity of genotypes in field populations of P. halstedii and a high frequency of recombination and/or mutation of the fungal genome is also suggested. Peer reviewed 2010-02-25T12:46:50Z 2010-02-25T12:46:50Z 2002 artículo http://purl.org/coar/resource_type/c_6501 Plant Disease 86 (7): 736-740. 2002 0191-2917 http://hdl.handle.net/10261/21633 en http://apsjournals.apsnet.org/doi/pdf/10.1094/PDIS.2002.86.7.736 none 143230 bytes application/pdf American Phytopathological Society
institution IAS ES
collection DSpace
country España
countrycode ES
component Bibliográfico
access En linea
databasecode dig-ias-es
tag biblioteca
region Europa del Sur
libraryname Biblioteca del IAS España
language English
topic Genetic resistance
Helianthus annuus
Genetic resistance
Helianthus annuus
spellingShingle Genetic resistance
Helianthus annuus
Genetic resistance
Helianthus annuus
Molinero-Ruiz, Leire
Domínguez, Juan
Melero-Vara, José M.
Races of isolates of Plasmopara halstedii from Spain and studies on their virulence
description 5 pages; 5 tables
format artículo
topic_facet Genetic resistance
Helianthus annuus
author Molinero-Ruiz, Leire
Domínguez, Juan
Melero-Vara, José M.
author_facet Molinero-Ruiz, Leire
Domínguez, Juan
Melero-Vara, José M.
author_sort Molinero-Ruiz, Leire
title Races of isolates of Plasmopara halstedii from Spain and studies on their virulence
title_short Races of isolates of Plasmopara halstedii from Spain and studies on their virulence
title_full Races of isolates of Plasmopara halstedii from Spain and studies on their virulence
title_fullStr Races of isolates of Plasmopara halstedii from Spain and studies on their virulence
title_full_unstemmed Races of isolates of Plasmopara halstedii from Spain and studies on their virulence
title_sort races of isolates of plasmopara halstedii from spain and studies on their virulence
publisher American Phytopathological Society
publishDate 2002
url http://hdl.handle.net/10261/21633
work_keys_str_mv AT molineroruizleire racesofisolatesofplasmoparahalstediifromspainandstudiesontheirvirulence
AT dominguezjuan racesofisolatesofplasmoparahalstediifromspainandstudiesontheirvirulence
AT melerovarajosem racesofisolatesofplasmoparahalstediifromspainandstudiesontheirvirulence
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