Resistance to late blight (Phytophthora infestans) in ten wild Solanum species

Euphytica ◽  
1988 ◽  
Vol 39 (S3) ◽  
Author(s):  
L.T. Colon ◽  
D.J. Budding
Keyword(s):  
Late Blight ◽  
Phytophthora Infestans ◽  
Solanum Species ◽  
Wild Solanum Species ◽  
Wild Solanum

scholarly journals The presence of Phytophthora infestans in the rhizosphere of a wild Solanum species may contribute to off-season survival and pathogenicity

2020 ◽  
Vol 148 ◽  
pp. 103475 ◽  
Author(s):  
Ramesh R. Vetukuri ◽  
Laura Masini ◽  
Rebecca McDougal ◽  
Preeti Panda ◽  
Levine de Zinger ◽  
...  
Keyword(s):  
Phytophthora Infestans ◽  
Solanum Species ◽  
Wild Solanum Species ◽  
Wild Solanum

scholarly journals First Report of Phytophthora infestans A2 Mating Type in Ecuador

Plant Disease ◽  
1997 ◽  
Vol 81 (3) ◽  
pp. 311-311 ◽  
Author(s):  
P. J. Oyarzun ◽  
M. E. Ordoñes ◽  
G. A. Forbes ◽  
W. E. Fry
Keyword(s):  
Late Blight ◽  
Phytophthora Infestans ◽  
Mating Type ◽  
Solanum Species ◽  
Systematic Sampling ◽  
Transitional Area ◽  
Wild Solanum Species ◽  
Commercial Potato ◽  
Important Field ◽  
Andean Highlands

The tropical highlands of Ecuador are a genetic center for several Solanaceous species, including potato. In 1995 and 1996, severe late blight epidemics occurred in wild Solanum species, e.g., Solanum brevifolium, growing in the transitional area between the highlands and the coastal tropical lowlands near the city of Quito. Sixteen isolates of Phytophthora infestans were collected in 1995 and 36 isolates in 1996. Of these, three from 1995 and four from 1996 were A2 mating type. Extensive and systematic sampling of commercial potato and tomato in Ecuador have failed to reveal the presence of the A2 mating type (G. A. Forbes, X. M. Escobar, C. C. Ayala, J. Revelo, M. E. Ordoñez, B. A. Fry, K. Doucet, and W. E. Fry, Phytopathology, in press.). Apparently the A2 mating type reported for the first time in Ecuador is only associated with wild Solanaceous spp. Further research is required to determine the consequences of this event for management of late blight in both potato and tomato, two important field crops in the Andean highlands.

Identification of Late Blight Resistance Gene Homologues in Wild Solanum Species

2016 ◽  
Vol 88 (2) ◽  
pp. 789-796
Author(s):  
A. K. Srivastava ◽  
B. P. Singh ◽  
S. K. Kaushik ◽  
V. Bhardwaj ◽  
J. K. Tiwari ◽  
...  
Keyword(s):  
Late Blight ◽  
Resistance Gene ◽  
Late Blight Resistance ◽  
Solanum Species ◽  
Blight Resistance ◽  
Wild Solanum Species ◽  
Wild Solanum

scholarly journals Late Blight Resistance Screening of Major Wild Swedish Solanum Species: S. dulcamara, S. nigrum, and S. physalifolium

2018 ◽  
Vol 108 (7) ◽  
pp. 847-857 ◽  
Author(s):  
Kibrom B. Abreha ◽  
Åsa Lankinen ◽  
Laura Masini ◽  
Sofia Hydbom ◽  
Erik Andreasson
Keyword(s):  
Late Blight ◽  
Phytophthora Infestans ◽  
Quantitative Pcr ◽  
Late Blight Resistance ◽  
Solanum Species ◽  
Blight Resistance ◽  
Resistance Screening ◽  
Wild Solanum Species ◽  
Growth Difference

To understand the contribution of wild Solanum species to the epidemiology of potato late blight in Sweden, we characterized the resistance of the three putative alternative hosts: S. physalifolium, S. nigrum, and S. dulcamara to Phytophthora infestans, the causal agent of late blight. The pathogen sporulated in all 10 investigated S. physalifolium genotypes, suggesting susceptibility (S phenotype). Field-grown S. physalifolium was naturally infected but could regrow, though highly infected genotypes were smaller at the end of the season. In 75 S. nigrum genotypes, there were no symptoms (R phenotype) or a lesion restricted to the point of inoculation (RN phenotype), indicating resistance. In 164 S. dulcamara genotypes, most resistance variability was found within sibling groups. In addition to the three resistance phenotypes (R, RN, and S), in S. dulcamara a fourth new resistance phenotype (SL) was identified with lesions larger than the point of inoculation but without visible sporulation of the pathogen. Quantitative PCR confirmed P. infestans growth difference in RN, SL, and S phenotypes. Thus, in Sweden S. physalifolium is susceptible and could be a player in epidemiology. A limited role of S. dulcamara leaves in the epidemiology of late blight was suggested, since no major symptoms have been found in the field.

scholarly journals RESISTANCE OF WILD SOLANUM SPECIES AND HYBRIDS TO EARLY AND LATE BLIGHT

2020 ◽  
Vol 103 (2) ◽  
pp. 99-104
Author(s):  
N. M. Zoteyeva ◽  
◽  
V. V. Vasipov ◽  
A. S. Orina ◽  
◽  
...  
Keyword(s):  
Late Blight ◽  
Solanum Species ◽  
Wild Solanum Species ◽  
Wild Solanum

scholarly journals A Test of Taxonomic Predictivity: Resistance to Early Blight in Wild Relatives of Cultivated Potato

2008 ◽  
Vol 98 (6) ◽  
pp. 680-687 ◽  
Author(s):  
S. H. Jansky ◽  
R. Simon ◽  
D. M. Spooner
Keyword(s):  
Breeding System ◽  
Early Blight ◽  
Cladistic Analysis ◽  
Solanum Species ◽  
Morphological Data ◽  
Blight Resistance ◽  
Wild Solanum Species ◽  
Group Breeding ◽  
Mold Resistance ◽  
Wild Solanum

Host plant resistance offers an attractive method of control for early blight (caused by the foliar fungus Alternaria solani), a widespread disease that appears annually in potato crops worldwide. We tested the assumed ability of taxonomy to predict the presence of early blight resistance genes in wild Solanum species for which resistance was observed in related species. We also tested associations to ploidy, crossing group, breeding system, and geography. As in a prior study of Sclerotinia sclerotiorum (white mold) resistance, tremendous variation for resistance to early blight was found to occur within and among species. There was no discernable relationship between the distribution of resistant phenotypes and taxonomic series (based on an intuitive interpretation of morphological data), clade (based on a cladistic analysis of plastid DNA data), ploidy, breeding system, geographic distance, or climate parameters. Species and individual accessions with high proportions of early blight resistant plants were identified, but high levels of inter- and intra-accession variability were observed. Consequently, the designation of species or accessions as resistant or susceptible must take this variation into account. This study calls into question the assumption that taxonomic or geographic data can be used to predict sources of early blight resistance in wild Solanum species.

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