Spinach: better management of downy mildew and white rust through genomics

2010 ◽  
pp. 61-73
Author(s):  
J. C. Correll ◽  
B. H. Bluhm ◽  
C. Feng ◽  
K. Lamour ◽  
L. J. du Toit ◽  
...  
Keyword(s):  
Downy Mildew ◽  
White Rust

scholarly journals STUDY ON AN Ambrosia ISOLATE OF Plasmopara halstedii / ESTUDIO DE UN AISLADO DEL HONGO Plasmopara halstedii EN LA ESPECIE Ambrosia / ÉTUDE D’UN ISOLAT DU CHAMPIGNON Plasmopara halstedii SUR L’ESPÈCE Ambrosia

Helia ◽  
2000 ◽  
Vol 23 (33) ◽  
pp. 19-24
Author(s):  
Ilona Walcz ◽  
Katalin Bogár ◽  
Ferenc Virányi
Keyword(s):  
Downy Mildew ◽  
Disease Symptoms ◽  
Plasmopara Halstedii ◽  
White Rust

SUMMARY In 1998, a number of Ambrosia artemisifolia individuals located in the vicinity of a sunflower breeding nursery at Bicsérd, south Hungary, showed disease symptoms resembling downy mildew and/or white rust. Sporangia of both Plasmopara and Albugo have been isolated from the affected plants. Microscopical observations and subsequent inoculation experiments revealed the existence of Plasmopara halstedii on the affected A.artemisifolia plants. Following inoculations on a set of sunflower differentials, the Ambrosia isolates of P.halstedii consistently showed a virulence formula of 730 that is equal to pathotype 4.

scholarly journals FIELD STUDIES TO QUANTIFY POLYGENIC RESISTANCE IN SPINACH TO WHITE RUST AND DOWNY MILDEW.

HortScience ◽  
1990 ◽  
Vol 25 (9) ◽  
pp. 1122G-1123
Author(s):  
L.P. Brandenberger ◽  
T.E. Morelock ◽  
J.C. Correll
Keyword(s):  
Latent Period ◽  
Downy Mildew ◽  
Field Studies ◽  
Lesion Size ◽  
Field Observations ◽  
Breeding Line ◽  
Spore Concentration ◽  
Polygenic Resistance ◽  
White Rust ◽  
Lesion Number

Field observations indicate that polygenic resistance to downy mildew (Peronospora farinosa f. sp. spinaciae) was observed during the course of a breeding program to develop polygenic resistance to white rust (Albugo occidentalis). Field studies were initiated using five cultivars and one breeding line to quantify the level of resistance to downy mildew and white rust. Separate plots were inoculated with each pathogen at a specific spore concentration and then subjected to a minimum dew period of 12h. Infection was quantified by measuring latent period, lesion number, lesion size, sporulation and percent leaf area infected.

scholarly journals Albugo candida (white rust) suppresses resistance to downy mildew pathogens in Arabidopsis thaliana

2017 ◽  
Vol 38 (SI 2 - 6th Conf EFPP 2002) ◽  
pp. 474-476 ◽  
Author(s):  
A.J. Cooper ◽  
A. Woods-Tör ◽  
E.B. Holub
Keyword(s):  
Arabidopsis Thaliana ◽  
Downy Mildew ◽  
Rust Resistance ◽  
Downy Mildew Resistance ◽  
Bremia Lactucae ◽  
Structural Class ◽  
Albugo Candida ◽  
White Rust ◽  
Downy Mildews ◽  
Hyaloperonospora Parasitica

Arabidopsis thaliana accessions were inoculated with incompatible isolates of downy mildews, following pre-inoculation with compatible Albugo candida. Three isolates of Hyaloperonospora parasitica subsp. A. thaliana, an isolate of H. parasitica subsp. Brassica oleracea and one Bremia lactucae (lettuce) isolate were included. All downy mildews sporulated on A. thaliana, suggesting A. candida suppresses broad-spectrum downy mildew resistance. The white rust resistance gene, RAC5, is being investigated. The resistance phenotype associated with RAC5 seems not to involve a hypersensitive response. RAC5 has been mapped telomeric of nga106 on chromosome 5, in a region lacking NB-LRR genes, the most common structural class of resistance genes known in A. thaliana.

scholarly journals FIELD STUDIES TO QUANTIFY POLYGENIC RESISTANCE IN SPINACH TO WHITE RUST AND DOWNY MILDEW.

HortScience ◽  
1990 ◽  
Vol 25 (9) ◽  
pp. 1122g-1123
Author(s):  
L.P. Brandenberger ◽  
T.E. Morelock ◽  
J.C. Correll
Keyword(s):  
Latent Period ◽  
Downy Mildew ◽  
Field Studies ◽  
Lesion Size ◽  
Field Observations ◽  
Breeding Line ◽  
Spore Concentration ◽  
Polygenic Resistance ◽  
White Rust ◽  
Lesion Number

Field observations indicate that polygenic resistance to downy mildew (Peronospora farinosa f. sp. spinaciae) was observed during the course of a breeding program to develop polygenic resistance to white rust (Albugo occidentalis). Field studies were initiated using five cultivars and one breeding line to quantify the level of resistance to downy mildew and white rust. Separate plots were inoculated with each pathogen at a specific spore concentration and then subjected to a minimum dew period of 12h. Infection was quantified by measuring latent period, lesion number, lesion size, sporulation and percent leaf area infected.

White rust and downy mildew on new hosts in Turkey

2010 ◽  
Vol 38 (5) ◽  
pp. 475-476
Author(s):  
Hacer (Bakir) Sert ◽  
Candan Aykurt ◽  
Hüseyin Sümbül
Keyword(s):  
Downy Mildew ◽  
White Rust ◽  
New Hosts

Spinach: better management of downy mildew and white rust through genomics

2010 ◽  
Vol 129 (2) ◽  
pp. 193-205 ◽  
Author(s):  
J. C. Correll ◽  
B. H. Bluhm ◽  
C. Feng ◽  
K. Lamour ◽  
L. J. du Toit ◽  
...  
Keyword(s):  
Downy Mildew ◽  
White Rust
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