Potato Cultivars Differ in Current Season Potato Virus Y (PVY) Infection

Hamm, Philip B.; Hane, D. C.; Pavek, M. J.; Leroux, L. D.; Gieck, S. L.; David, N. L.

doi:10.1007/s12230-009-9112-0

Cited by 17 publications

(4 citation statements)

References 24 publications

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“…In addition, RN appears to be more likely to become infected by PVY during the season than in some other cultivars growing nearby (Hamm et al 2010). However, the impact of PVY infection in RN clonal selections has not been studied where vines are more vigorous, stay green longer, and where yields are greater than standard RN.…”

Section: Introductionmentioning

confidence: 90%

Effect of Potato Virus Y on Yield of a Clonal Selection of Russet Norkotah

Whitworth¹,

Hamm

McIntosh

2010

Am. J. Pot Res

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Successful selections of Russet Norkotah lines have produced larger, more vigorous vines and higher yields than the standard Russet Norkotah (RN). Potato Virus Y (PVY), while producing mild or "latent" symptoms in this cultivar, has been shown to significantly reduce yields. To determine PVY's effect on yield of a RN selection, PVY infected RN and Russet Norkotah selection 3 (RN3) yields were compared after planting in Hermiston, Oregon in 2001, 2003. After emergence, individual plants were ELISA tested for PVY multiple times during the growing season to confirm infection. Plants were categorized when infected; 1) current season, 2) seed borne or 3) "no PVY". At harvest, total and marketable yield data were collected. RN3 produced higher total yields than RN, regardless of infection categories. Highest yield reductions of RN and RN3 due to PVY were in the following order; seed borne PVY >>current season PVY >>no PVY.Resumen Las selecciones exitosas de líneas de Russet NorKotah han producido follajes más grandes y vigorosos, y mayores rendimientos, que la Russet NorKotah (RN) convencional. El virus Y de la papa (PVY), mientras produce síntomas ligeros o "latentes" en esta variedad, se ha demostrado que reduce significativamente los rendimientos. A fin de determinar el efecto del PVY sobre el rendimiento de una selección de RN, se compararon los rendimientos entre RN infectada y una selección 3 de NorKotah (RN3), después de plantar en Hermiston, Oregon, en 2001, 2003 y 2006. Después de la emergencia se hicieron pruebas de ELISA para PVY muchas veces a plantas individuales durante el período de crecimiento para confirmar la infección. Cuando se infectaron, las plantas se categorizaron: 1) durante el crecimiento, 2) de la semilla, o 3) "no PVY". A la cosecha se tomaron datos de rendimiento total y comercial. RN3 produjo mayor rendimiento total que RN, independientemente de las categorías de infección. Las más altas reducciones en el rendimiento de RN y RN3 debido a PVY fueron en el siguiente orden; PVY proveniente de semilla >>PVY por infección de campo >>no PVY.

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Section: Introductionmentioning

confidence: 90%

Effect of Potato Virus Y on Yield of a Clonal Selection of Russet Norkotah

Whitworth¹,

Hamm

McIntosh

2010

Am. J. Pot Res

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“…In the present opinion, the Panel decided to categorise all recombinant isolates collectively as PVYrecombinants because: (i) there is limited evidence that recombinants possess novel biological properties compared to their parental PVY-C, PVY-N and PVY-O strains, (ii) impact (symptoms) in potato plants has been shown to depend more on the cultivar and growing conditions than on the infecting virus population (Hamm et al, 2009;Funke et al, 2017), and (iii) new recombinant isolates emerge continuously and the frequency of recombination events is likely to be similar within and outside the EU and, as a consequence, it is impossible to predict whether and where recombinants will arise and what their impact might be.…”

Section: Intraspecific Diversitymentioning

confidence: 99%

Pest categorisation of potato virus Y (non‐EU isolates)

Bragard¹,

Dehnen‐Schmutz²,

Gonthier³

et al. 2020

EFS2

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Following a request from the EU Commission, the Panel on Plant Health has addressed the pest categorisation of non-EU isolates of potato virus Y (PVY). The information currently available on geographical distribution, biology, epidemiology, potential entry pathways and potential additional impact of non-EU isolates of PVY, has been evaluated with regard to the criteria to qualify as a potential Union quarantine pest. Because non-EU isolates of PVY are absent from the EU, they do not meet one of the requirements to be regulated as a regulated non-quarantine pest (RNQP) (presence in the EU); as a consequence, the Panel decided not to evaluate the other RNQP criteria for these isolates. Populations of PVY can be subdivided into several strains and groups of isolates: strain C (PVY-C), strain N (PVY-N), strain O (PVY-O) and a wide range of recombinant isolates (PVYrecombinants) which have a worldwide distribution (including the EU). Two groups of isolates, i.e. the Brazilian (PVY-Br) and Chilean (PVY-Ch) isolates, are considered absent from the EU. Non-EU isolates of PVY-C, PVY-N, PVY-O and PVY-recombinants identified so far are not expected to have an additional impact in the EU compared to the PVY isolates already present and, therefore, do not meet the corresponding criterion to qualify as a potential Union quarantine pest. The Panel is unable to conclude on the potential additional impact of isolates of PVY-Br and PVY-Ch in the EU territory, but these isolates meet all the other criteria to qualify as potential Union quarantine pests.

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“…Even in countries with highly developed potato seed certification programs, PVY management is still a major challenge due to the gross underestimation of PVY incidence caused by mildly symptomatic recombinant PVY strains, asymptomatic Typhoid Mary cultivars, and late-season asymptomatic foliar infections by aphids [ 9 , 11 ]. Therefore, development of PVY-resistant cultivars is the most effective and environment-friendly approach to control PVY infection in potato.…”

Section: Introductionmentioning

confidence: 99%

Susceptibility factor StEXA1 interacts with StnCBP to facilitate potato virus Y accumulation through the stress granule-dependent RNA regulatory pathway in potato

Chen

et al. 2022

Horticulture Research

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Plant viruses recruit multiple host factors for translation, replication, and movement in the infection process. The loss-of-function mutation of the susceptibility genes will lead to the loss of susceptibility to viruses, which is referred to as “recessive resistance”. Essential for potexvirus Accumulation 1 (EXA1) has been identified as a susceptibility gene required for potexvirus, lolavirus, and bacterial and oomycete pathogens. In this study, EXA1 knockdown in potato (StEXA1) was found to confer novel resistance to potato virus Y (PVY, potyvirus) in a strain-specific manner. It significantly compromised PVYO accumulation but not PVYN:O and PVYNTN. Further analysis revealed that StEXA1 is associated with the HC-Pro of PVY through a member of eIF4Es (StnCBP). HC-ProO and HC-ProN, two HC-Pro proteins from PVYO and PVYN, exhibited strong and weak interactions with StnCBP, respectively, due to their different spatial conformation. Moreover, the accumulation of PVYO was mainly dependent on the stress granules (SGs) induced by StEXA1 and StnCBP, whereas PVYN:O and PVYNTN could induce SGs by HC-ProN independently through an unknown mechanism. These results could explain why StEXA1 or StnCBP knockdown conferred resistance to PVYO but not to PVYN:O and PVYNTN. In summary, our results for the first time demonstrate that EXA1 can act as a susceptibility gene for PVY infection. Finally, a hypothetical model was proposed for understanding the mechanism by which StEXA1 interacts with StnCBP to facilitate PVY accumulation in potato through the SG-dependent RNA regulatory pathway.

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Potato Cultivars Differ in Current Season Potato Virus Y (PVY) Infection

Cited by 17 publications

References 24 publications

Effect of Potato Virus Y on Yield of a Clonal Selection of Russet Norkotah

Effect of Potato Virus Y on Yield of a Clonal Selection of Russet Norkotah

Pest categorisation of potato virus Y (non‐EU isolates)

Susceptibility factor StEXA1 interacts with StnCBP to facilitate potato virus Y accumulation through the stress granule-dependent RNA regulatory pathway in potato

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