Arjun Upadhaya

Arjun Upadhaya hails from Chitwan district of Nepal, 100 miles Southwest from the capital, Kathmandu. He completed his M.S. in plant pathology from North Dakota State University. Arjun joined the PhD program in the Fall of 2018 and has been working on stem rust disease of barley and wheat. His work on barley host involves a) identification of better sources of resistances against local virulent population to help develop resistant barley cultivars through introgression, and b) mapping of resistance locus on barley chromosome to help develop closely linked markers for efficient selection of breeding materials. On the pathogen side, he is trying to understand the evolutionary mechanism of virulence gain or loss in the PNW pathogen population utilizing genomics, phenomics, and bioinformatics. Arjun believes that the output of his research works, both basic and applied, can be translated to farm/field for the development of improved malt/feed/food barley cultivars with resistance to stem rust disease in the PNW region.


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Upadhaya, A., GC Sudha Upadhaya, RS Brueggeman. (2021). The wheat stem rust (Puccinia graminis f. sp. tritici) population from Washington contains the most virulent isolates reported on barley. Plant Disease. doi: 10.1094/PDIS-06-21-1195-RE

Upadhaya, A., GP Yan, Secor, GA, Robinson, A. (2020). Effects of Co-Inoculation with Pratylenchus penetrans and Fusarium oxysporum on Growth and Yield of Potato Cultivar Red Norland. American Journal of Potato Research. 97 (3). doi: 10.1007/s12230-020-09770-8

Upadhaya, A., GP Yan, J Pasche. (2019). Reproduction ability and growth effect of pin nematode, Paratylenchus nanus, with selected cultivars of field pea. Plant Disease. 103 (10): 2520-5226. doi: 10.1094/PDIS-12-18-2136-RE

Upadhaya, A., GP Yan, J Pasche, A Kalil. (2019). Occurrence and distribution of vermiform plant-parasitic nematodes and the relationship with soil factors in field pea (Pisum sativum) in North Dakota, USA. Nematology. 21 (5): 457. doi: 10.1163/15685411-00003225

Upadhaya, A., GP Yan, Secor, GA, Robinson, A. (2018). Micro-plot study of potato emergence disorder in commercial fields in Central Minnesota. Phytopathology. 108 (12): 37

Upadhaya, A., GP Yan, A Plaisance, J Pasche (2017). Plant-parasitic nematodes on field pea and their association with soil edaphic factors in North Dakota. Phytopathology. 107 (12): 177.

Yan, GP., A Plaisance, I Chowdhury, R Baidoo, A Upadhaya, J Pasche, S Markell, B Nelson, S Chen. (2017). First Report of the Soybean Cyst Nematode Heterodera glycines Infecting Dry Bean (Phaseolus vulgaris L.) in a Commercial Field in Minnesota. Plant Disease. 101 (2): 391. doi: 10.1094/PDIS-09-16-1257-PDN

Chowdhury, I., GP Yan, A Plaisance, B Nelson, S Markell, TC Helms, A Upadhaya. (2016). Population diversity of soybean cyst nematode in North Dakota fields. Journal of Nematology. 48 (4): 310.

Upadhaya, A., GP Yan, A Plaisance, J Pasche, K McPhee. (2016). Identification and reproduction of pin nematodes on field pea (Pisum sativum) in North Dakota. Journal of Nematology. 48 (4): 378.

Plaisance, A., GP Yan, A Upadhaya. (2016). Selected northern-grown crops as hosts of Pratylenchus scribneri. Journal of Nematology. 48 (4): 363.

Yan, GP., A Plaisance, D Huang, A Upadhaya, NC Gudmestad, ZA Handoo. (2016). First Report of the Stubby Root Nematode Paratrichodorus allius on Potato in North Dakota. Plant Disease. 100 (6): 1247 doi: 10.1094/PDIS-11-15-1350-PDN