Symptom expression and accumulation of potato virus Y (PVYO) and potato leaf roll virus in thirteen potato cultivars

Authors

• Jari Valkonen Department of Plant Production, P.O. Box 27 (Viikki), FIN-00014 University of Helsinki, Finland
• Eerik Mäkäräinen Department of Plant Production, P.O. Box 27 (Viikki), FIN-00014 University of Helsinki, Finland

DOI: https://doi.org/10.23986/afsci.72638

Abstract

Necrotic local lesions developed in cvs. Matilda, Ostara, Record, Satuma, Stina, Hankkija’s (Hjan) Tanu and Hjan Timo and local ring spots in Olympia and Sieglinde (Siikli) following sap inoculation with the ordinary strain of potato virus Y (PVY0). Secondarily infected cvs. Ostara, Pito, Siikli and Hjan Timo developed leaf drop. No infected progeny was produced by Matilda, Saturna and Hjan Tanu. In contrast, Bintje, Puikula and Sabina developed neither local lesions nor systemic necrosis, but showed mosaic symptoms following primary and secondary infection by PVYO. The ELISA absorbance values for potato leafroll virus (PLRV) in Ostara, Pito and Saturna were less than 10% of those in the PLRV-infected Siikli. The ELISA values for PLRV in Olympia, Stina, Hjan Tanu and Hjan Timo were not significantly different from those of Siikli. The severity of the symptoms did not correlate with the concentration of PLRV in the potatoes.