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Use of the virus strain group concept to characterize the resistance to PVX and PVYo in the potato cv Allegany

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Abstract

Resistance to the potato viruses X (PVX), Y (PVY) and A (PVA) was examined in the potato cv Allegany released by Cornell University in 1990. Standard potato cultivars from North America and Europe were included for characterization of the resistance response. Allegany was extremely resistant to a strain group 3 isolate of PVX and reacted with hypersensitivity to an ordinary strain isolate of PVY (PVYo). However, Allegany was susceptible to an isolate of PVY causing necrosis in tobacco (PVYN), and to an isolate of PVA. No symptoms appeared following infection with PVYN and PVA. Identification of existing virus strain groups in a geographic area is an important aspect of predicting cultivar response to inoculation in the field.

Compendio

Se examinó la resistencia a los virus X (PVX), Y (PVY) y A (PVA) en el cultivar de papa Allegany liberada por la Universidad de Cornell en 1990. Se incluyeron cultivares estándar norteamericanos y europeos para la caracterización de la respuesta de la resistencia. Allegany fue extremadamente resistente a un aislamiento de la variante del grupo 3 de PVX y reaccionó con hipersensibilidad a un aislamiento de la variante común del PVY (PVYo). Sin embargo, Allegany fue susceptible a un aislamiento de PVY causando necrosis en tabaco (PVYN), y a un aislamiento de PVA. No se presentaron síntomas después de la infección con PVYN y PVA. La identificación de los grupos existentes de variantes de los virus en una zona geográfica es un aspecto importante de predicción de la respuesta del cultivar a la inoculación en el campo.

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Authors and Affiliations

  1. Department of Plant Pathology, USA

    J. P. T. Valkonen (Post-doctoral Associate) & S. A. Slack (Professor)

  2. Department of Plant Breeding and Biometry, Cornell University, 14853, Ithaca, NY

    R. L. Plaisted (Professor)

Authors
  1. J. P. T. Valkonen
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  2. S. A. Slack
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  3. R. L. Plaisted
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Valkonen, J.P.T., Slack, S.A. & Plaisted, R.L. Use of the virus strain group concept to characterize the resistance to PVX and PVYo in the potato cv Allegany. American Potato Journal 71, 507–516 (1994). https://doi.org/10.1007/BF02851323

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