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Historical and recent migrations of Phytophthora infestans: chronology, pathways and implications.
The 1984 report of A2 mating types of Phytophthora infestans (Mont.) de Bary in western Europe was the first indication of new and dramatic developments in populations of that Fungus, indicating changes were not restricted to western Europe but, rather, were worldwide.
Genome Analyses of an Aggressive and Invasive Lineage of the Irish Potato Famine Pathogen
It is shown that isolates of the 13_A2 lineage are among the most aggressive on cultivated potatoes, outcompete other aggressive lineages in the field, and overcome previously effective forms of plant host resistance, illustrating how pathogen population monitoring, combined with genome analysis, informs the management of devastating disease epidemics.
Migration from northern Mexico as the probable cause of recent genetic changes in populations of Phytophthora infestans in the United States and Canada.
Isolates of Phytophthora infestans from five U.S. states and one Canadian province collected between October 1987 and October 1991 were analyzed for mating type and for genetic variation at two allozyme loci.
Genetic Change Within Populations of Phytophthora infestans in the United States and Canada During 1994 to 1996: Role of Migration and Recombination.
- S. B. Goodwin, C. Smart, R. Sandrock, K. Deahl, Z. Punja, W. Fry
- Biology, MedicinePhytopathology
- 1 September 1998
Ability to infect both potato and tomato apparently did not increase the fitness of this genotype relative to US-8, as predicted previously, and it generally was not possible to predict which genotypes would be present in a location from 1 year to the next.
Leptine Glycoalkaloids and Resistance to the Colorado Potato Beetle (Coleoptera: Chrysomelidae) in Solanum chacoense
Differences between the high- and low-leptine clone from each accession were significant for all five resistance parameters, and these differences appeared to be directly related to the concentration of foliar leptines.
QTL mapping of foliar glycoalkaloid aglycones in Solanum tuberosum×S. berthaultii potato progenies: quantitative variation and plant secondary metabolism
- G. C. Yencho, S. Kowalski, R. S. Kobayashi, S. Sinden, M. Bonierbale, K. Deahl
- BiologyTheoretical and Applied Genetics
- 25 September 1998
The QTLs detected in this study probably represent structural and/or regulatory genes controlling the accumulation of solasodine and solanidine and are discussed in the context of steroid alkaloid accumulation and biosynthesis.
Segregation of leptine glycoalkaloids in Solanum chacoense bitter
Occurrence of the A2 mating type ofPhytophthora infestans in potato fields in the United States and Canada
This is the first report of the presence of the A2 mating type of P. infestans in the U.S. and Canada, and two of the ten isolates produced oospores in less than 15 days when cultured in the absence of known A1 mating types from the USA, Mexico, and Europe.
Recent Genotypes of Phytophthora infestans in the Eastern United States Reveal Clonal Populations and Reappearance of Mefenoxam Sensitivity.
Whereas most individuals of US-8 and US-20 were resistant to mefenoxam, US-21 appeared to be intermediately sensitive, and isolates ofUS-22, US,23, andUS-24 were largely sensitive to me Fenoxam; these latter three genotypes appear to have been derived from a common ancestor.
Performance of Colorado potato beetle larvae,Leptinotarsa decemlineata (Say), reared on synthetic diets supplemented withSolanum glycoalkaloids
- S. Kowalski, J. Domek, K. Deahl, L. Sanford
- BiologyAmerican Journal of Potato Research
- 1 September 1999
By rearing Colorado potato beetle, from egg to prepupal stage, on a synthetic diet supplemented with the glycoalkaloids α-tomatine, α-chaconine,α-solanine, leptine I and the steroidal aglycone solanidine, this work has been able to further establish the effects (ex planta) of these compounds on the Colorado potato beetles.