Jari P.T. Valkonen

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See Jari P.T. Valkonen in the ISPI database of scientists.


Publications of Jari P.T. Valkonen

PLoS ONE (2017) 12 (5 - e0178242)
Noora Nordenstedt, Delfia Marcenaro, Daudi Chilagane, Beatrice Mwaipopo, Minna-Liisa Rajamäki, Susan Nchimbi-Msolla, Paul J.R. Njau, Deusdedith R. Mbanzibwa and Jari P.T. Valkonen (2017)
Pathogenic seedborne viruses are rare but Phaseolus vulgaris endornaviruses are common in bean varieties grown in Nicaragua and Tanzania

Plant Disease (2017) 101, 224-232
Lea H. Hiltunen, Jani Kelloniemi and Jari P.T. Valkonen (2017)
Repeated applications of a nonpathogenic Streptomyces strain enhance development of suppressiveness to potato common scab

PLoS ONE (2016) 11 (12 - e0167769)
Arthur K. Tugume, Settumba B. Mukasa and Jari P.T. Valkonen (2016)
Mixed infections of four viruses, the incidence and phylogenetic relationships of Sweet potato chlorotic fleck virus (Betaflexiviridae) isolates in wild species and sweetpotatoes in Uganda and evidence of distinct isolates in East Africa

EPPO Bulletin (2016) 46, 103-111
Y. Degefu, P. Somervuo, M. Aittamaa, E. Virtanen and J.P.T. Valkonen (2016)
Evaluation of a diagnostic microarray for the detection of major bacterial pathogens of potato from tuber samples

Molecular Plant Pathology (2016) 17, 1111-1123
Milton Untiveros, Allan Olspert, Katrin Artola, Andrew E. Firth, Jan F. Kreuze and Jari P.T. Valkonen (2016)
A novel sweet potato potyvirus open reading frame (ORF) is expressed via polymerase slippage and suppresses RNA silencing

Annals of Applied Biology (2016) 168, 122-132
L. Dong, A. Lemmetty, S. Latvala, O. Samuilova and J.P.T. Valkonen (2016)
Occurrence and genetic diversity of Raspberry leaf blotch virus (RLBV) infecting cultivated and wild Rubus species in Finland

Annals of Applied Biology (2015) 167, 90-101
K. Kostamo, A. Toljamo, P. Palonen, J.P.T. Valkonen, S.O. Kärenlampi and H. Kokko (2015)
Control of downy mildew (Peronospora sparsa) in arctic bramble (Rubus arcticus ssp. arcticus)

Archives of Virology (2015) 160, 1345-1351
Ulrike Beuch, Sofia Berlin, Jonas Åkerblom, Mogens Nicolaisen, Steen Lykke Nielsen, James M. Crosslin, Philip B. Hamm, Johanna Santala, Jari P.T. Valkonen and Anders Kvarnheden (2015)
Diversity and evolution of Potato mop-top virus

Journal of General Virology (2015) 96, 714-725
Eeva J. Vainio, Jaana Jurvansuu, Janne Streng, Minna-Liisa Rajamäki, Jarkko Hantula and Jari P.T. Valkonen (2015)
Diagnosis and discovery of fungal viruses using deep sequencing of small RNAs

Molecular Plant Pathology (2015) 16, 735-747
Yan-Ping Tian and Jari P.T. Valkonen (2015)
Recombination of strain O segments to HCpro-encoding sequence of strain N of Potato virus Y modulates necrosis induced in tobacco and in potatoes carrying resistance genes Ny or Nc

Breeding Science (2015) 65, 69-76
Jari P.T. Valkonen (2015)
Elucidation of virus-host interactions to enhance resistance breeding for control of virus diseases in potato

Molecular Plant-Microbe Interactions (2014) 27, 1199-1210
Minna-Liisa Rajamäki, Janne Streng and Jari P.T. Valkonen (2014)
Silencing suppressor protein VPg of a Potyvirus interacts with the plant silencing-related protein SGS3

Journal of General Virology (2014) 95, 486-495
Isabel Weinheimer, Kajohn Boonrod, Mirko Moser, Michael Wassenegger, Gabi Krczal, Sarah J. Butcher and Jari P.T. Valkonen (2014)
Binding and processing of small dsRNA molecules by the class 1 RNase III protein encoded by Sweet potato chlorotic stunt virus

PLoS ONE (2014) 9 (6 - e99446)
Elisa Santovito, Tiziana Mascia, Shahid A. Siddiqui, Serena Anna Minutillo, Jari P.T. Valkonen and Donato Gallitelli (2014)
Infection cycle of Artichoke Italian latent virus in tobacco plants: Meristem invasion and recovery from disease symptoms

Annals of Applied Biology (2014) 165, 43-52
M.W. Dees, E. Lysøe, M.B. Brurberg, P. Somervuo, M. Almvik and J.P.T. Valkonen (2014)
Global gene expression in the common scab pathogen, Streptomyces scabies, exposed to potato microtubers

Plant Disease (2014) 98, p. 1267 (Hiltunen et al.)
L.H. Hiltunen, J. Kelloniemi and J.P.T. Valkonen (2014)
First report of Streptomyces europaeiscabiei causing common scab on potato in Finland

PLoS ONE (2014) 9 (12 - e115766)
Yan-Ping Tian, Jussi Hepojoki, Harri Ranki, Hilkka Lankinen and Jari P.T. Valkonen (2014)
Analysis of Potato virus Y coat protein epitopes recognized by three commercial monoclonal antibodies

PLoS ONE (2013) 8 (11 - e81479)
Arthur K. Tugume, Robert Amayo, Isabel Weinheimer, Settumba B. Mukasa, Patrick R. Rubaihayo and Jari P.T. Valkonen (2013)
Genetic variability and evolutionary implications of RNA silencing suppressor genes in RNA1 of Sweet potato chlorotic stunt virus isolates infecting sweetpotato and related wild species

Plant Disease (2013) 97, p. 1260 (Chiunga et al.)
E. Chiunga and J.P.T. Valkonen (2013)
First report of five viruses infecting potatoes in Tanzania

Molecular Plant-Microbe Interactions (2013) 26, 297-305
Yan-Ping Tian and Jari P.T. Valkonen (2013)
Genetic determinants of Potato virus Y required to overcome or trigger hypersensitive resistance to PVY strain group O controlled by the gene Ny in potato

PLoS ONE (2013) 8 (8 - e71030)
Sascha M. Kirchner, Lea Hiltunen, Thomas F. Döring, Elina Virtanen, Jukka P. Palohuhta and Jari P.T. Valkonen (2013)
Seasonal phenology and species composition of the aphid fauna in a northern crop production area

Molecular Plant-Microbe Interactions (2013) 26, 503-514
Xianbao Deng, Jani Kelloniemi, Tuuli Haikonen, Anssi L. Vuorinen, Paula Elomaa, Teemu H. Teeri and Jari P.T. Valkonen (2013)
Modification of Tobacco rattle virus RNA1 to serve as a VIGS vector reveals that the 29k movement protein is an RNA silencing suppressor of the virus

Molecular Plant-Microbe Interactions (2013) 26, 721-733
Tuuli Haikonen, Minna-Liisa Rajamäki, Yan-Ping Tian and Jari P.T. Valkonen (2013)
Mutation of a short variable region in HCpro protein of Potato virus A affects interactions with a microtubule-associated protein and induces necrotic responses in tobacco

Journal of Plant Pathology (2013) 95, 211-216
M. Zizyte, J. Valkonen and J. Staniulis (2013)
Characterization of Beet necrotic yellow vein virus infecting sugar beet in Lithuania

Molecular Plant-Microbe Interactions (2013) 26, 734-744
Tuuli Haikonen, Minna-Liisa Rajamäki and Jari P.T. Valkonen (2013)
Interaction of the microtubule-associated host protein HIP2 with viral helper component proteinase is important in infection with Potato virus A

Journal of Virology (2013) 87, 4313-4321
Olga Samuilova, Johanna Santala and Jari P.T. Valkonen (2013)
Tyrosine phosphorylation of the triple gene block protein 3 regulates cell-to-cell movement and protein interactions of Potato mop-top virus

Annals of Applied Biology (2012) 160, 298-307
Mikko T. Lehtonen, Eeva M. Marttinen, Motomu Akita and Jari P.T. Valkonen (2012)
Fungi infecting cultivated moss can also cause diseases in crop plants

Plant Disease (2012) 96, p. 1231 (Bi et al.)
Y. Bi, K. Artola, T. Kurokura, T. Hytönen and J.P.T. Valkonen (2012)
First report of Raspberry leaf blotch virus in raspberries in Finland

Molecular Plant Pathology (2012) 13, 174-186
Merete W. Dees, Panu Somervuo, Erik Lysøe, Marja Aittamaa and Jari P.T. Valkonen (2012)
Species' identification and microarray-based comparative genome analysis of Streptomyces species isolated from potato scab lesions in Norway

Plant Disease (2012) 96, 1430-1437
M. Kashif, S. Pietilä, K. Artola, R.A.C. Jones, A.K. Tugume, V. Mäkinen and J.P.T. Valkonen (2012)
Detection of viruses in sweetpotato from Honduras and Guatemala augmented by deep-sequencing of small-RNAs

Plant Pathology (2011) 60, 426-435
L.H. Hiltunen, M. Alanen, I. Laakso, A. Kangas, E. Virtanen and J.P.T. Valkonen (2011)
Elimination of common scab sensitive progeny from a potato breeding population using thaxtomin A as a selective agent

Annals of Applied Biology (2011) 159, 414-427
S.M. Kirchner, T.F. Döring, L.H. Hiltunen, E. Virtanen and J.P.T. Valkonen (2011)
Information-theory-based model selection for determining the main vector and period of transmission of Potato virus Y

Journal of Virology (2011) 85, 6784-6794
Marjo Ala-Poikela, Elisa Goytia, Tuuli Haikonen, Minna-Liisa Rajamäki and Jari P.T. Valkonen (2011)
Helper component proteinase of the genus Potyvirus is an interaction partner of translation initiation factors eIF(iso)4E and eIF4E and contains a 4E binding motif

Molecular Plant-Microbe Interactions (2011) 24, 685-693
Shahid A. Siddiqui, Jari P.T. Valkonen, Minna-Liisa Rajamäki and Kirsi Lehto (2011)
The 2b silencing suppressor of a mild strain of Cucumber mosaic virus alone is sufficient for synergistic interaction with Tobacco mosaic virus and induction of severe leaf malformation in 2b-transgenic tobacco plants

Journal of General Virology (2011) 92, 974-987
D.R. Mbanzibwa, Y.P. Tian, A.K. Tugume, B.L. Patil, J.S. Yadav, B. Bagewadi, M.M. Abarshi, T. Alicai, W. Changadeya, J. Mkumbira, M.B. Muli, S.B. Mukasa, F. Tairo, Y. Baguma, S. Kyamanywa, A. Kullaya, M.N. Maruthi, C.M. Fauquet and J.P.T. Valkonen (2011)
Evolution of cassava brown streak disease-associated viruses

Phytopathology (2011) 101, 377-387
Y.P. Tian, J.L. Liu, C.L. Zhang, Y.Y. Liu, B. Wang, X.-D. Li, Z.K. Guo and J.P.T. Valkonen (2011)
Genetic diversity of Potato virus Y infecting tobacco crops in China

Plant Disease (2010) 94, p. 921 (Valkonen et al.)
J.P.T. Valkonen and M. Rännäli (2010)
First report of European mountain ash ringspot-associated virus in Sorbus aucuparia from eastern Karelia, Russia

Molecular Plant Pathology (2010) 11, 733-746
Marja Aittamaa, Panu Somervuo, Into Laakso, Petri Auvinen and Jari P.T. Valkonen (2010)
Microarray-based comparison of genetic differences between strains of Streptomyces turgidiscabies with focus on the pathogenicity island

Journal of General Virology (2010) 91, 1092-1108
Arthur K. Tugume, Settumba B. Mukasa, Nisse Kalkkinen and Jari P.T. Valkonen (2010)
Recombination and selection pressure in the ipomovirus Sweet potato mild mottle virus (Potyviridae) in wild species and cultivated sweetpotato in the centre of evolution in East Africa

Molecular Ecology (2010) 19, 3139-3156
Arthur K. Tugume, Wilmer J. Cuéllar, Settumba B. Mukasa and Jari P.T. Valkonen (2010)
Molecular genetic analysis of virus isolates from wild and cultivated plants demonstrates that East Africa is a hotspot for the evolution and diversification of Sweet potato feathery mottle virus

Annals of Applied Biology (2010) 157, 163-178
J. Santala, O. Samuilova, A. Hannukkala, S. Latvala, H. Kortemaa, U. Beuch, A. Kvarnheden, P. Persson, K. Topp, K. Ørstad, C. Spetz, S.L. Nielsen, H.G. Kirk, M. Budziszewska, P. Wieczorek, A. Obrepalska-Steplowska, H. Pospieszny, A. Kryszczuk, J. Sztangret-Wiśniewska, Z. Yin, M. Chrzanowska, E. Zimnoch-Guzowska, E. Jackeviciene, L. Taluntytė, N. Pūpola, J. Mihailova, I. Lielmane, L. Järvekülg, K. Kotkas, E. Rogozina, A. Sozonov, I. Tikhonovich, P. Horn, I. Broer, S. Kuusiene, J. Staniulis, J.G. Uth, G. Adam and J.P.T. Valkonen (2010)
Detection, distribution and control of Potato mop-top virus, a soil-borne virus, in northern Europe

Annals of Applied Biology (2010) 157, 229-241
A.L. Vuorinen, E. Gammelgård, P. Auvinen, P. Somervuo, S. Dere and J.P.T. Valkonen (2010)
Factors underpinning the responsiveness and higher levels of virus resistance realised in potato genotypes carrying virus-specific R genes

Plant Pathology (2009) 58, 1161-1169
J.N.E. Ramsell, M.I. Boulton, D.P. Martin, J.P.T. Valkonen and A. Kvarnheden (2009)
Studies on the host range of the barley strain of Wheat dwarf virus using an agroinfectious viral clone

Journal of Applied Microbiology (2009) 106, 199-212
L.H. Hiltunen, T. Ojanperä, H. Kortemaa, E. Richter, M.J. Lehtonen and J.P.T. Valkonen (2009)
Interactions and biocontrol of pathogenic Streptomyces strains co-occurring in potato scab lesions

Journal of Virology (2009) 83, 6934-6940
Yanping Tian, Settumba B. Mukasa and Jari P.T. Valkonen (2009)
Cassava brown streak virus (Potyviridae) encodes a putative Maf/HAM1 pyrophosphatase implicated in reduction of mutations and a P1 proteinase that suppresses RNA silencing but contains no HC-Pro

Archives of Virology (2009) 154, 353-359
D.R. Mbanzibwa, Y.P. Tian, A.K. Tugume, S.B. Mukasa, F. Tairo, S. Kyamanywa, A. Kullaya and Jari P.T. Valkonen (2009)
Genetically distinct strains of Cassava brown streak virus in the Lake Victoria basin and the Indian Ocean coastal area of East Africa

Annals of Applied Biology (2009) 154, 351-363
Q.C. Wang, B. Panis, F. Engelmann, M. Lambardi and J.P.T. Valkonen (2009)
Cryotherapy of shoot tips: A technique for pathogen eradication to produce healthy planting materials and prepare healthy plant genetic resources for cryopreservation

Phytopathology (2009) 99, 344-352
A.K. Kallinen, I.L. Lindberg, A.K. Tugume and J.P.T. Valkonen (2009)
Detection, distribution, and genetic variability of European mountain ash ringspot-associated virus

Phytopathology (2009) 99, 519-531
Satu Latvala-Kilby, Johanna M. Aura, Neda Pupola, Asko Hannukkala and Jari P.T. Valkonen (2009)
Detection of Potato mop-top virus in potato tubers and sprouts: Combinations of RNA2 and RNA3 variants and incidence of symptomless infections

Plant Disease (2009) 93, 933-939
M. Rännäli, V. Czeka, R.A.C. Jones, J.D. Fletcher, R.I. Davis, L. Mu and J.P.T. Valkonen (2009)
Molecular characterization of Sweet potato feathery mottle virus (SPFMV) isolates from Easter Island, French Polynesia, New Zealand, and Southern Africa

Journal of Molecular Evolution (2009) 69, 150-163
Paavo Ahvenniemi, Matthias Wolf, Mari J. Lehtonen, Paula Wilson, Malgorzata German-Kinnari and Jari P.T. Valkonen (2009)
Evolutionary diversification indicated by compensatory base changes in ITS2 secondary structures in a complex fungal species, Rhizoctonia solani

Annals of Applied Biology (2008) 152, 121-130
J.P.T. Valkonen, K. Wiegmann, J.H. Hämäläinen, W. Marczewski and K.N. Watanabe (2008)
Evidence for utility of the same PCR-based markers for selection of extreme resistance to Potato virus Y controlled by Rysto of Solanum stoloniferum derived from different sources

Phytopathology (2008) 98, 1190-1198
M.J. Lehtonen, P. Somervuo and J.P.T. Valkonen (2008)
Infection with Rhizoctonia solani induces defense genes and systemic resistance in potato sprouts grown without light

Molecular Plant Pathology (2008) 9, 705-717
M. Aittamaa, P. Somervuo, M. Pirhonen, L. Mattinen, R. Nissinen, P. Auvinen and J.P.T. Valkonen (2008)
Distinguishing bacterial pathogens of potato using a genome-wide microarray approach

Archives of Virology (2008) 153, 1-13
R.P. Singh, J.P.T. Valkonen, S.M. Gray, N. Boonham, R.A.C. Jones, C. Kerlan and J. Schubert (2008)
Discussion paper: The naming of Potato virus Y strains infecting potato

Annals of Applied Biology (2008) 153, 307-320
P.S. Wilson, P.M. Ahvenniemi, M.J. Lehtonen, M. Kukkonen, H. Rita and J.P.T. Valkonen (2008)
Biological and chemical control and their combined use to control different stages of the Rhizoctonia disease complex on potato through the growing season

Phytopathology (2008) 98, 640-652
A.K. Tugume, S.B. Mukasa and J.P.T. Valkonen (2008)
Natural wild hosts of Sweet potato feathery mottle virus show spatial differences in virus incidence and virus-like diseases in Uganda

Journal of General Virology (2008) 89, 573-582
Wilmer J. Cuellar, Fred Tairo, Jan F. Kreuze and Jari P.T. Valkonen (2008)
Analysis of gene content in Sweet potato chlorotic stunt virus RNA1 reveals the presence of the p22 RNA silencing suppressor in only a few isolates: implications for viral evolution and synergism

Plant Pathology (2008) 57, 141-151
M.J. Lehtonen, P. Ahvenniemi, P.S. Wilson, M. German-Kinnari and J.P.T. Valkonen (2008)
Biological diversity of Rhizoctonia solani (AG-3) in a northern potato-cultivation environment in Finland

Plant Disease (2008) 92, 1313-1320
M. Rännäli, V. Czekaj, R.A.C. Jones, J.D. Fletcher, R.I. Davis, L. Mu, G.I. Dwyer, B.A. Coutts and J.P.T. Valkonen (2008)
Molecular genetic characterization of Sweet potato virus G (SPVG) isolates from areas of the Pacific Ocean and southern Africa

Plant Pathology (2008) 57, 152-161
P.S. Wilson, E.O. Ketola, P.M. Ahvenniemi, M.J. Lehtonen and J.P.T. Valkonen (2008)
Dynamics of soilborne Rhizoctonia solani in the presence of Trichoderma harzianum: effects on stem canker, black scurf and progeny tubers of potato

Molecular Plant Pathology (2008) 9, 237-250
Qiaochun Wang, Wilmer J. Cuellar, Minna-Liisa Rajamäki, Yukimasa Hirata and Jari P.T. Valkonen (2008)
Combined thermotherapy and cryotherapy for efficient virus eradication: relation of virus distribution, subcellular changes, cell survival and viral RNA degradation in shoot tips

Plant Pathology (2008) 57, 338-347
Q.C. Wang and J.P.T. Valkonen (2008)
Efficient elimination of sweetpotato little leaf phytoplasma from sweetpotato by cryotherapy of shoot tips

Molecular Plant Pathology (2008) 9, 589-598
Jan F. Kreuze, Ilanit Samolski Klein, Milton Untiveros Lazaro, Wilmer J. Cuellar Chuquiyuri, Gabriela Lajo Morgan, Patricia G. Cipriani Mejía, Marc Ghislain and Jari P.T. Valkonen (2008)
RNA silencing-mediated resistance to a crinivirus (Closteroviridae) in cultivated sweetpotato (Ipomoea batatas L.) and development of sweetpotato virus disease following co-infection with a potyvirus

Archives of Virology (2007) 152, 1941-1949
T.A. Melgarejo, M.T. Lehtonen, C.E. Fribourg, M. Rännäli and J.P.T. Valkonen (2007)
Strains of BCMV and BCMNV characterized from lima bean plants affected by deforming mosaic disease in Peru

Virus Genes (2007) 35, 801-806
Xiao-Qing Yu, Yu-Fei Lan, Hong-Yan Wang, Jin-Liang Liu, Xiao-Ping Zhu, Jari P.T. Valkonen and Xiang-Dong Li (2007)
The complete genomic sequence of Tobacco vein banding mosaic virus and its similarities with other potyviruses

Journal of General Virology (2007) 88, 2337-2346
Elin Gammelgård, Maradumane Mohan and Jari P.T. Valkonen (2007)
Potyvirus-induced gene silencing: the dynamic process of systemic silencing and silencing suppression

Archives of Virology (2007) 152, 1911-1915
Y.-P. Tian, J.-L. Liu, X.-Q. Yu, L.-P. Lei, X.-P. Zhu, J.P.T. Valkonen and X.-D. Li (2007)
Molecular diversity of Tobacco vein banding mosaic virus

Virus Genes (2007) 34, 387-399
Anna Germundsson, Eugene I. Savenkov, Marjo Ala-Poikela and Jari P.T. Valkonen (2007)
VPg of Potato virus A alone does not suppress RNA silencing but affects virulence of a heterologous virus

Plant Pathology (2006) 55, 458-467
S.B. Mukasa, P.R. Rubaihayo and J.P.T. Valkonen (2006)
Interactions between a crinivirus, an ipomovirus and a potyvirus in coinfected sweetpotato plants

Molecular Breeding (2006) 18, 313-325
Britt-Louise Lennefors, Eugene I. Savenkov, Jan Bensefelt, Elisabeth Wremerth-Weich, Petra van Roggen, Stig Tuvesson, Jari P.T. Valkonen and Jan Gielen (2006)
dsRNA-mediated resistance to Beet necrotic yellow vein virus infections in sugar beet (Beta vulgaris L. ssp. vulgaris)

Plant Disease (2006) 90, 1120-1128
Fred Tairo, Roger A.C. Jones and Jari P.T. Valkonen (2006)
Potyvirus complexes in sweetpotato: occurrence in Australia, serological and molecular resolution, and analysis of the Sweet potato virus 2 (SPV2) component

Theoretical and Applied Genetics (2006) 112, 1458-1464
C. Gebhardt, D. Bellin, H. Henselewski, W. Lehmann, J. Schwarzfischer and J.P.T. Valkonen (2006)
Marker-assisted combination of major genes for pathogen resistance in potato

Annals of Applied Biology (2006) 149, 9-14
F. Tairo, R.A.C. Jones and J.P.T. Valkonen (2006)
Phytoplasma from little leaf disease affected sweetpotato in Western Australia: detection and phylogeny

Plant Pathology (2005) 54, 448-459
M. Ala-Poikela, E. Svensson, A. Rojas, T. Horko, L. Paulin, J.P.T. Valkonen and A. Kvarnheden (2005)
Genetic diversity and mixed infections of begomoviruses infecting tomato, pepper and cucurbit crops in Nicaragua

Journal of General Plant Pathology (2005) 71, 23-28
Robert A. Andersson, Motomu Akita, Minna Pirhonen, Elin Gammelgård and Jari P.T. Valkonen (2005)
Moss-Erwinia pathosystem reveals possible similarities in pathogenesis and pathogen defense in vascular and nonvascular plants

Molecular Plant Pathology (2005) 6, 199-211
Fred Tairo, Settumba B. Mukasa, Roger A.C. Jones, Alois Kullaya, Patrick R. Rubaihayo and Jari P.T. Valkonen (2005)
Unravelling the genetic diversity of the three main viruses involved in Sweet Potato Virus Disease (SPVD), and its practical implications

Archives of Virology (2005) 150, 1281-1299
A. Rojas, A. Kvarnheden, D. Marcenaro and J.P.T. Valkonen (2005)
Sequence characterization of Tomato leaf curl Sinaloa virus and Tomato severe leaf curl virus: Phylogeny of New World begomoviruses and detection of recombination

Annals of Applied Biology (2005) 146, 395-403
L.H. Hiltunen, A. Weckman, A. Ylhäinen, H. Rita, E. Richter and J.P.T. Valkonen (2005)
Responses of potato cultivars to the common scab pathogens, Streptomyces scabies and S. turgidiscabies

Virus Genes (2005) 31, 57-64
B.-L. Lennefors, E.I. Savenkov, S.B. Mukasa and J.P.T. Valkonen (2005)
Sequence divergence of four soilborne sugarbeet-infecting viruses

Journal of General Virology (2005) 86, 2879-2889
N.I. Lukhovitskaya, N.E. Yelina, A.A. Zamyatnin Jr., M.V. Schepetilnikov, A.G. Solovyev, M. Sandgren, S.Yu. Morozov, J.P.T. Valkonen and E.I. Savenkov (2005)
Expression, localization and effects on virulence of the cysteine-rich 8 kDa protein of Potato mop-top virus

Journal of General Virology (2004) 85, 739-747
Viiu Paalme, Elin Gammelgård, Lilian Järvekülg and Jari P.T. Valkonen (2004)
In vitro recombinants of two nearly identical potyviral isolates express novel virulence and symptom phenotypes in plants

Archives of Virology (2004) 149, 2025-2034
T.A. Melgarejo, A. Alminaite, C. Fribourg, C. Spetz and J.P.T. Valkonen (2004)
Strains of Peru tomato virus infecting cocona (Solanum sessiliflorum), tomato and pepper in Peru with reference to genome evolution in genus Potyvirus

Plant Disease (2004) 88, 916-920
Fred Tairo, Alois Kullaya and Jari P.T. Valkonen (2004)
Incidence of viruses infecting sweetpotato in Tanzania

Archives of Virology (2004) 149, 843-853
M. Bisnieks, A. Kvarnheden, R. Sigvald and J.P.T. Valkonen (2004)
Molecular diversity of the coat protein-encoding region of Barley yellow dwarf virus-PAV and Barley yellow dwarf virus-MAV from Latvia and Sweden

Molecular Plant-Microbe Interactions (2004) 17, 502-510
Carl Spetz and Jari P.T. Valkonen (2004)
Potyviral 6K2 protein long-distance movement and symptom-induction functions are independent and host-specific

Annals of Applied Biology (2004) 144, 77-86
M-L. Rajamäki and J.P.T. Valkonen (2004)
Detection of a natural point mutation in Potato virus A that overcomes resistance to vascular movement in Nicandra physaloides, and studies on seed-transmissibility of the mutant virus

Molecular Plant-Microbe Interactions (2004) 17, 921-930
Andrey A. Zamyatnin Jr., Andrey G. Solovyev, Eugene I. Savenkov, Anna Germundsson, Maria Sandgren, Jari P.T. Valkonen and Sergey Y. Morozov (2004)
Transient coexpression of individual genes encoded by the triple gene block of Potato mop-top virus reveals requirements for TGBp1 trafficking

Plant Pathology (2004) 53, 280-287
M.J. Lehtonen, H. Rantala, J.F. Kreuze, H. Bång, L. Kuisma, P. Koski, E. Virtanen, K. Vihlman and J.P.T. Valkonen (2004)
Occurrence and survival of potato scab pathogens (Streptomyces species) on tuber lesions: quick diagnosis based on a PCR-based assay

Molecular Plant-Microbe Interactions (2003) 16, 405-410
Deyin Guo, Carl Spetz, Mart Saarma and Jari P.T. Valkonen (2003)
Two potato proteins, including a novel RING finger protein (HIP1), interact with the potyviral multifunctional protein Hcpro

Journal of General Virology (2003) 84, 1001-1005
Eugene I. Savenkov, Anna Germundsson, Andrey A. Zamyatnin Jr., Maria Sandgren and Jari P.T. Valkonen (2003)
Potato mop-top virus: the coat protein-encoding RNA and the gene for cysteine-rich protein are dispensable for systemic virus movement in Nicotiana benthamiana

Archives of Virology (2003) 148, 2449-2460
J.A. IsHak, J.F. Kreuze, A. Johansson, S.B. Mukasa, F. Tairo, F.M. Abo El-Abbas and J.P.T. Valkonen (2003)
Some molecular characteristics of three viruses from SPVD-affected sweet potato plants in Egypt

Breeding Science (2003) 53, 155-161
Hangning Zhang, Jari P.T. Valkonen and Kazuo N. Watanabe (2003)
A bacterial artificial chromosome (BAC) library for potato and identification of clones related to the potato Y potyvirus resistance gene Ryadg

Virus Genes (2003) 27, 49-56
S.B. Mukasa, F. Tairo, J.F. Kreuze, A. Kullaya, P.R. Rubaihayo and J.P.T. Valkonen (2003)
Coat protein sequence analysis reveals occurrence of new strains of Sweet potato feathery mottle virus in Uganda and Tanzania

Journal of General Virology (2003) 84, 2565-2578
C. Spetz, A.M. Taboada, S. Darwich, J. Ramsell, L.F. Salazar and J.P.T. Valkonen (2003)
Molecular resolution of a complex of potyviruses infecting solanaceous crops at the centre of origin in Peru

Plant Pathology (2003) 52, 567-578
H. Lindqvist-Kreuze, S. Hellqvist, H. Koponen and J.P.T. Valkonen (2003)
Phoma-Didymella complex on hybrid arctic bramble with wilting symptoms

Archives of Virology (2003) 148, 373-380
C. Spetz and J.P.T. Valkonen (2003)
Genomic sequence of Wild potato mosaic virus as compared to the genomes of other potyviruses

Molecular Plant-Microbe Interactions (2003) 16, 25-34
Minna-Liisa Rajamäki and Jari P.T. Valkonen (2003)
Localization of a Potyvirus and the viral genome-linked protein in wild potato leaves at an early stage of systemic infection

Archives of Virology (2003) 148, 487-496
S.B. Mukasa, P.R. Rubaihayo and J.P.T. Valkonen (2003)
Sequence variability within the 3'-proximal part of the Sweet potato mild mottle virus genome

Plant Disease (2003) 87, 329-335
Settumba B. Mukasa, Patrick R. Rubaihayo and Jari P.T. Valkonen (2003)
Incidence of viruses and viruslike diseases of sweetpotato in Uganda

Journal of Virology (2002) 76, 9260-9270
J.F. Kreuze, E.I. Savenkov and J.P.T. Valkonen (2002)
Complete genome sequence and analyses of the subgenomic RNAs of Sweet potato chlorotic stunt virus reveal several new features for the genus Crinivirus

Journal of General Virology (2002) 83, 2325-2335
Eugene I. Savenkov and Jari P.T. Valkonen (2002)
Silencing of a viral RNA silencing suppressor in transgenic plants

Archives of Virology (2002) 147, 205-216
A. Kvarnheden, M. Lindblad, K. Lindsten and J.P.T. Valkonen (2002)
Genetic diversity of Wheat dwarf virus

Virus Genes (2002) 24, 65-75
Igor Oruetxebarria, Anders Kvarnheden and Jari P.T. Valkonen (2002)
Analysis of putative interactions between potyviral replication proteins and plant retinoblastoma proteins

Molecular Plant-Microbe Interactions (2002) 15, 138-149
Minna-Liisa Rajamäki and Jari P.T. Valkonen (2002)
Viral genome-linked protein (VPg) controls accumulation and phloem-loading of a potyvirus in inoculated potato leaves

European Journal of Plant Pathology (2002) 108, 327-335
Hannele Lindqvist-Kreuze, Hilkka Koponen and Jari P.T. Valkonen (2002)
Variability of Peronospora sparsa (syn. P. rubi) in Finland as measured by amplified fragment length polymorphism

Molecular Plant-Microbe Interactions (2002) 15, 683-692
Jari P.T. Valkonen, Minna-Liisa Rajamäki and Tuija Kekarainen (2002)
Mapping of viral genomic regions important in cross-protection between strains of a potyvirus

Journal of General Virology (2002) 83, 1201-1209
Anna Germundsson, Maria Sandgren, Hugh Barker, Eugene I. Savenkov and Jari P.T. Valkonen (2002)
Initial infection of roots and leaves reveals different resistance phenotypes associated with coat protein gene-mediated resistance to Potato mop-top virus

Journal of General Virology (2002) 83, 1211-1221
Andres Merits, Minna-Liisa Rajamäki, Päivi Lindholm, Pia Runeberg-Roos, Tuija Kekarainen, Pietri Puustinen, Katri Mäkeläinen, Jari P.T. Valkonen and Mart Saarma (2002)
Proteolytic processing of potyviral proteins and polyprotein processing intermediates in insect and plant cells

Molecular Plant-Microbe Interactions (2002) 15, 717-727
Sabina Vidal, Héctor Cabrera, Robert A. Andersson, Anna Fredriksson and Jari P.T. Valkonen (2002)
Potato gene Y-1 is an N gene homolog that confers cell death upon infection with potato virus Y

Archives of Virology (2001) 146, 467-477
M. Sandgren, E.I. Savenkov and J.P.T. Valkonen (2001)
The readthrough region of Potato mop-top virus (PMTV) coat protein encoding RNA, the second largest RNA of PMTV genome, undergoes structural changes in naturally infected and experimentally inoculated plants

Virus Genes (2001) 22, 335-343
Igor Oruetxebarria and Jari P.T. Valkonen (2001)
Analysis of the P1 gene sequences and the 3'-terminal sequences and secondary structures of the single-stranded RNA genome of Potato virus V

Journal of General Virology (2001) 82, 935-939
Deyin Guo, Minna-Liisa Rajamäki, Mart Saarma and Jari P.T. Valkonen (2001)
Towards a protein interaction map of potyviruses: protein interaction matrixes of two potyviruses based on the yeast two-hybrid system

African Crop Science Journal (2001) 9, 293-299
R.F. Karyeija, J.F. Kreuze, R.W. Gibson and J.P.T. Valkonen (2001)
Variability of sweetpotato feathery mottle virus in Africa

Annual Review of Phytopathology (2001) 39, 79-102
Christiane Gebhardt and Jari P.T. Valkonen (2001)
Organization of genes controlling disease resistance in the potato genome

Journal of General Virology (2001) 82, 2275-2278
E.I. Savenkov and J.P.T. Valkonen (2001)
Coat protein gene-mediated resistance to Potato virus A in transgenic plants is suppressed following infection with another potyvirus

Molecular Plant-Microbe Interactions (2000) 13, 366-373
Tuula Mäki-Valkama, Jari P.T. Valkonen, Jan F. Kreuze and Eija Pehu (2000)
Transgenic resistance to PVY(^O) associated with post-transcriptional silencing of P1 transgene is overcome by PVY(^N) strains that carry highly homologous P1 sequences and recover transgene expression at infection

Molecular Breeding (2000) 6, 95-104
Tuula Mäki-Valkama, Tuula Pehu, Anne Santala, Jari P.T. Valkonen, Kimmo Koivu, Kirsi Lehto and Eija Pehu (2000)
High level of resistance to Potato virus Y by expressing P1 sequence in antisense orientation in transgenic potato

Annals of Applied Biology (2000) 137, 107-112
H. Koponen, S. Hellqvist, H.B. Lindqvist-Kreuze, U. Ng and J.P.T. Valkonen (2000)
Occurrence of Peronospora sparsa (P. rubi) on cultivated and wild Rubus species in Finland and Sweden

Molecular Plant-Microbe Interactions (2000) 13, 402-412
Jaana H. Hämäläinen, Tuija Kekarainen, Christiane Gebhardt, Kazuo N. Watanabe and Jari P.T. Valkonen (2000)
Recessive and dominant genes interfere with the vascular transport of potato virus A in diploid potatoes

Phytopathology (2000) 90, 1250-1255
Robert F. Karyeija, Jan F. Kreuze, Richard W. Gibson and Jari P.T. Valkonen (2000)
Two serotypes of Sweetpotato feathery mottle virus in Uganda and their interaction with resistant sweetpotato cultivars

Plant Disease (2000) 84, 843-846
Aldo Rojas, Anders Kvarnheden and Jari P.T. Valkonen (2000)
Geminiviruses infecting tomato crops in Nicaragua

Archives of Virology (2000) 145, 567-574
J.F. Kreuze, R.F. Karyeija, R.W. Gibson and J.P.T. Valkonen (2000)
Comparisons of coat protein gene sequences show that East African isolates of Sweet potato feathery mottle virus form a genetically distinct group

Phytopathology (2000) 90, 437-444
Igor Oruetxebarria, Tuija Kekarainen, Carl Spetz and Jari P.T. Valkonen (2000)
Molecular characterization of Potato virus V genomes from Europe indicates limited spatiotemporal strain differentiation

Journal of General Virology (1999) 80, 1133-1139
J. Andrejeva, U. Puur, A. Merits, F. Rabenstein, L. Jarvekulg and J.P.T. Valkonen (1999)
Potyvirus helper component-proteinase and coat protein (CP) have coordinated functions in virus-host interactions and the same CP motif affects virus transmission and accumulation

Archives of Virology (1999) 144, 2355-2366
T. Kekarainen, A. Merits, I. Oruetxebarria, M.-L. Rajamäki and J.P.T. Valkonen (1999)
Comparison of the complete sequences of five different isolates of Potato virus A (PVA), genus Potyvirus

Theoretical and Applied Genetics (1999) 99, 996-1005
J.P.T. Valkonen and K.N. Watanabe (1999)
Autonomous cell death, temperature sensitivity and the genetic control associated with resistance to Cucumber mosaic virus (CMV) in diploid potatoes (Solanum spp.)

Molecular Plant-Microbe Interactions (1999) 12, 1074-1081
M.L. Rajamaki and J.P.T. Valkonen (1999)
The 6K2 protein and the VPg of potato virus A are determinants of systemic infection in Nicandra physaloides

Journal of General Virology (1999) 80, 2779-2784
Eugene I. Savenkov, Maria Sandgren and Jari P.T. Valkonen (1999)
Complete sequence of RNA 1 and the presence of tRNA-like structures in all RNAs of Potato mop-top virus, genus Pomovirus

Phytopathology (1999) 89, 462-469
Jan F. Kreuze, Sini Suomalainen, Lars Paulin and Jari P.T. Valkonen (1999)
Phylogenetic analysis of 16S rRNA genes and PCR analysis of the nec1 gene from Streptomyces spp. causing common scab, pitted scab, and netted scab in Finland

Annals of Applied Biology (1998) 133, 39-44
R.F. Karyeija, R.W. Gibson and J.P.T. Valkonen (1998)
Resistance to sweet potato virus disease (SPVD) in wild East African Ipomoea

International Congress of Plant Pathology (1998) Andrejeva et al. - Host species-dependent and ...
J. Andrejeva, A. Merits, Ü. Puurand, L. Järvekülg, M. Saarma and J.P.T. Valkonen (1998)
Host species-dependent and virus strain-dependent long-distance movement of potato A potyvirus
Edinburgh, U.K. (9 - 16 Aug. 1998), Poster presented in section: Viral pathogenicity

International Congress of Plant Pathology (1998) Lindqvist et al. - Peronospora sparsa in arctic ...
H. Lindqvist, H. Koponen and J.P.T. Valkonen (1998)
Peronospora sparsa in arctic bramble (Rubus arcticus)
Edinburgh, U.K. (9 - 16 Aug. 1998), Poster presented in section: The status of molecular methods for pathogen detection, diagnosis and estimation in commercial detection technology

Phytopathology (1998) 88, 1073-1077
J.P.T. Valkonen, V-M. Rokka and K.N. Watanabe (1998)
Examination of the leaf-drop symptom of virus-infected potato using anther culture-derived haploids

Plant Disease (1998) 82, 4-15
R.F. Karyeija, R.W. Gibson and J.P.T. Valkonen (1998)
The significance of Sweet potato feathery mottle virus in subsistence sweet potato production in Africa

Theoretical and Applied Genetics (1998) 96, 1036-1043
J.H. Hämäläinen, V.A. Sorri, K.N. Watanabe, C. Gebhardt and J.P.T. Valkonen (1998)
Molecular examination of a chromosome region that controls resistance to potato Y and A potyviruses in potato

Theoretical and Applied Genetics (1998) 96, 840-843
T.J. Tommiska, J.H. Hämäläinen, K.N. Watanabe and J.P.T. Valkonen (1998)
Mapping of the gene Nxphu that controls hypersensitive resistance to Potato virus X in Solanum phureja IvP35

International Congress of Plant Pathology (1998) Maeki-Valkama et al. - Potato virus Y P1 ...
T. Mäki-Valkama, A. Lehtinen, A. Santala, K. Koivu, T. Pehu, K. Lehto, J. Valkonen and E. Pehu (1998)
Potato virus Y P1 gene-mediated resistance in transgenic potato
Edinburgh, U.K. (9 - 16 Aug. 1998), Poster presented in section: Genetically-engineered disease resistance 1. Foreign genes

Phytopathology (1998) 88, 311-321
M. Rajamäki, A. Merits, F. Rabenstein, J. Andrejeva, L. Paulin, T. Kekarainen, J.F. Kreuze, R.L.S. Forster and J.P.T. Valkonen (1998)
Biological, serological, and molecular differences among isolates of potato A potyvirus

Plant Disease (1998) 82, 1304-1311
Hannele Lindqvist, Hilkka Koponen and Jari P.T. Valkonen (1998)
Peronospora sparsa on cultivated Rubus arcticus and its detection by PCR based on ITS sequences

International Congress of Plant Pathology (1998) Karyeija et al. - Variability of sweet potato ...
R.F. Karyeija, J.F. Kreuze, R.W. Gibson and J.P.T. Valkonen (1998)
Variability of sweet potato feathery mottle potyvirus (SPFMV) in East Africa
Edinburgh, U.K. (9 - 16 Aug. 1998), Poster presented in section: Viral pathogenicity

International Congress of Plant Pathology (1998) Valkonen et al. - Potyvirus-potato plant ...
J.P.T. Valkonen, A. Merits, T. Kekarainen, U. Puurand, J.H. Hamalainen, J. Andrejeva, M. Rajamaki, I. Oruechevarria, J.F. Kreuze, V.A. Sorri, K.N. Watanabe and M. Sarma (1998)
Potyvirus-potato plant interactions: a case study on potato virus
Edinburgh, U.K. (9 - 16 Aug. 1998), Poster presented in section: Viral pathogenicity

Plant Disease (1997) 81, 1317-1322
Päivi Lindholm, Hanna Kortemaa, Mirkka Kokkola, Kielo Haahtela, Mirja Salkinoja-Salonen and Jari P.T. Valkonen (1997)
Streptomyces spp. isolated from potato scab lesions under nordic conditions in Finland

Phytoparasitica (1997) 25, p. 229 (Maki-Valkama et al.)
T. Maki-Valkama, T. Pehu, J. Valkonen, K. Lehto, E. Pehu and M. Zaitlin (1997)
Characterization of the P1-gene-mediated resistance in transgenic potato plants
The Xth International Congress of Virology, August 11-16, 1996, Binyanei haOoma, Jerusalem, Israel, poster

Theoretical and Applied Genetics (1997) 94, 192-197
J.H. Hämäläinen, K.N. Watanabe, J.P.T. Valkonen, A. Arihara, R.L. Plaisted, E. Pehu, L. Miller and S.A. Slack (1997)
Mapping and marker-assisted selection for a gene for extreme resistance to Potato virus Y

Annals of Applied Biology (1997) 130, 91-104
J.P.T. Valkonen (1997)
Novel resistances to four potyviruses in tuber-bearing potato species, and temperature-sensitive expression of hypersensitive resistance to Potato virus Y

Phytoparasitica (1997) 25, 74-75
J.P.T. Valkonen, Ü. Puurand, A. Merits, F. Rabinstein, O. Sorri and M. Saarma (1997)
Studies of potato A potyvirus (PVA) using infectious transcripts from a full-length cDNA: Elicitation of hypersensitive resistance responses in potato, and aphid-transmissibility
The Xth International Congress of Virology, August 11-16, 1996, Jerusalem, Israel, poster

Annals of Applied Biology (1996) 129, 25-38
J.P.T. Valkonen, M.M. Kyle and S.A. Slack (1996)
Comparison of resistance to potyviruses within Solanaceae: infection of potatoes with tobacco etch potyvirus and peppers with potato A and Y potyviruses

Journal of General Virology (1991) 72, 231-236
J.P. Valkonen, E. Pehu, M.G. Jones and R.W. Gibson (1991)
Resistance in Solanum brevidens to both Potato virus Y and Potato virus X may be associated with slow cell-to-cell spread