Research Highlights and Events
Pursuit of resistant germplasm
By Kylie Swisher Grimm and Max Feldman | Spudman
“As part of the USDA Specialty Crop Research Initiative Potato Virus Initiative Project, we designed, validated and implemented a high-throughput greenhouse assay to screen potato germplasm for resistance to potato mop-top virus.”
Methods to induce sprouting in dormant potato tubers for direct tuber testing of Potato Virus Y
By Nathan Gelles, Nora Olsen, Mike Thornton, Alex Karasev | American Journal of Potato Research
“This study identified a novel dormancy breaking treatment to promote earlier and accurate PVY detection by direct tuber testing using ELISA and provided data to support direct tuber testing for post-harvest evaluation of PVY in seed certification.”
Slow but steady progress being made in PVY resistant potatoes
By Alex Karasev and Nora Olsen | Potato Grower
“In the long term, breeding and identifying cultivars with resistance genes that are broadly specific against all strains of PVY may be the best agronomic, environmental and economic strategy for combating PVY.”
A potential new source of extreme resistance to Potato Virus Y in the potato variety Bistra
By Gregory L. Elison, Jaebum Park, Richard G. Novy, Jonathan L. Whitworth | American Journal of Potato Research
“Sante and its progeny Bistra are examples of two varieties with extreme resistance to PVY and yet have no amplification of Ry associated molecular markers.”
Screening three potato cultivars for resistance to Potato virus Y strains: Broad and strain-specific sources of resistance
By Cassandra N. Funke, Lisa T. Tran, Alexander V. Karasev | American Journal of Potato Research
“None of the 18 isolates of the virus was found able to replicate in the inoculated or upper non-inoculated leaves of Payette Russet, confirming the broad specificity of the Rysto gene present in the Payette Russet genome.”
A Genome Wide Association Study (GWAS) identifies SNPs associated with resistance to Tobacco Rattle Virus (TRV) and Potato Mop-Top Virus (PMTV) in a tetraploid mapping population of potato
By Noelle Anglin, Shashi Yelarreddygari, Neil Gudmestad, Vidyasagar Sathuvalli, Charles Brown, Max Feldman, Walter De Jong, David Douches, Rich Novy, Joseph Coombs | American Journal of Potato Research
“This data can guide the development of molecular markers to select genotypes resistant to PMTV and TRV in potato breeding programs.”
Maine’s battle with PVY: Aroostook Farms Field Day highlights virus strains, control challenges
By Lukie Pieterse | Potato News Today
“The field day was an opportunity for agricultural professionals to observe firsthand the impact of PVY on potatoes.”
Brassica cover crops and natural Spongospora subterranea infestation of peat-based potting mix may increase powdery scab risk on potato
By Maryam Alaryan, Yuan Zeng, Ana Cristina Fulladolsa, Amy O. Charkowski | Plant Disease
“The results suggest that buckwheat, legumes, and barley pose the least risk as cover crops in S. subterranea infested fields and show that peat-based potting mix should not be used in seed potato production.”
Seed Potato Workshop Proves Highly Valuable: Attendees came from several potato-producing states, one province
By Nina Zidack | Potato Grower
“The postharvest test is the definitive measure by which seed potato quality is measured by certification agencies”
Battling Potato Viruses: Innovations for a healthier harvest
By Potatoes USA | The Potatoes USA Pulse Industry Updates
“The primary objectives of this project are to improve disease diagnosis, virus detection and strain typing.”
Potato Virus Initiative Developing Direct Tuber Testing Alternatives
By Alex Karasev and Nora Olsen | Potato Grower
“Waiting to know the level of potato virus Y (PVY) in a seed lot after harvest can be a game of patience.”
Tuber Necrotic Research Podcast
Host Natalia Cervantes, Guest speaker Alex Karasev
In this episode, Potatoes USA Conversation Architect Natalia Cervantes interviews Alexander Karasev, professor of plant virology at the University of Idaho. Karasev joins Potato-Cast for a discussion on the latest Tuber Necrotic Viruses Research Project and the complex measures that can keep the infection level for potato viruses below the economically significant threshold. The hope is that eventually, growers can start adopting these measures as well.