Abstract
Potato psyllid, Bactericera cockerelli (Šulc) (Hemiptera: Triozidae), is a key pest of potato and the vector of “Candidatus Liberibacter solanacearum,” the pathogen associated with zebra chip disease. Development of potato cultivars with genetic resistance to potato psyllid would enable cost-effective control of this pest with reduced use of insecticides. To facilitate the development of resistant cultivars, the objective of our study was to screen germplasm accessions of Solanum verrucosum for resistance to potato psyllid. The susceptibility of S. verrucosum germplasm accessions to potato psyllid was highly variable in choice prescreening assays and no-choice performance assays. Compared with the susceptible potato cultivar, ‘Russet Burbank,’ several S. verrucosum populations exhibited strong resistance to potato psyllid. The S. verrucosum accession, PI 195170 was highly resistant to potato psyllid, and is a potential source of genetic resistance for the development of resistant potato cultivars.
Resumen
El psílido de la papa, Bactericera cockerelli (Šulc) (Hemiptera: Triozidae), es una plaga clave de la papa y el vector de “Candidatus Liberibacter solanacearum,” el patógeno asociado a la enfermedad de la papa rayada (zebra chip). El desarrollo de variedades de papa con resistencia genética al psílido, permitiría un control costo-efectivo de esta plaga con el uso reducido de insecticidas. Para facilitar el desarrollo de variedades resistentes, el objetivo de nuestro estudio fue probar introducciones de germoplasma de Solanum verrucosum para la resistencia al psílido. La susceptibilidad de las introducciones del germoplasma de S. verrucosum al psílido de la papa fue altamente variable en ensayos de la selección antes de la evaluación, y en el comportamiento de los ensayos de no selección. Al compararlas con la variedad susceptible de papa “Russet Burbank”, varias poblaciones de S. verrucosum exhibieron fuerte resistencia al psílido. La introducción PI 195170 de S, verrucosum fue altamente resistente al psílido y es una fuente potencial de resistencia genética para el desarrollo de variedades resistentes de papa.
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Acknowledgments
Pauline Anderson and Heather Headrick provided technical assistance. Partial funding was provided by the USDA-ARS Germplasm Crop Committee. Mention of trade names or commercial products in this article is solely for the purpose of providing specific information and does not imply recommendation or endorsement by the United States Department of Agriculture. USDA is an equal opportunity provider and employer.
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Cooper, W.R., Bamberg, J.B. Variation in Susceptibility to Potato Psyllid, Bactericera cockerelli (Hemiptera: Triozidae), among Solanum verrucosum Germplasm Accessions. Am. J. Potato Res. 93, 386–391 (2016). https://doi.org/10.1007/s12230-016-9512-x
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DOI: https://doi.org/10.1007/s12230-016-9512-x