Germplasm with Resistance to Potato virus Y Derived from Solanum chacoense: Clones M19 (39–7) and M20 (XD3)

  • Ana Cristina Fulladolsa
  • Amy Charkowski
  • Xingkui Cai
  • Jonathan Whitworth
  • Stewart Gray
  • Shelley JanskyEmail author


Potato virus Y (PVY) causes one of the most serious and widespread diseases in North America. In recent years, the virus has become increasingly difficult to control. Durable dominant genes for resistance to PVY exist in potato germplasm and provide an effective control strategy. This paper describes a Solanum chacoense clone (M19) that is homozygous for a PVY resistance gene. The gene is linked to a previously published marker for Rychc found in Solanum chacoense. M19 was crossed with a diploid S. tuberosum clone to produce an adapted clone carrying the resistance gene. This hybrid clone is named M20. M20 tuberizes in the field, producing round tubers with white skin and flesh and moderate size. M20 is resistant to PVYO, PVYN:O, and PVYNTN. Both M19 and M20 are female and male fertile, so they are being released as sources of PVY resistance for breeding programs.


PVY Wild potato Crop wild relative Breeding Disease resistance 


El Virus Y de la Papa (PVY) causa una de las enfermedades más serias y de amplia distribución en Norteamérica. En años recientes, el virus ha aumentado la dificultad para su control. Los genes durables dominantes para resistencia al PVY existen en el germoplasma de papa y proporcionan una estrategia de control efectivo. Este artículo describe un clon (M19) de Solanum chacoense que es homozigótico para un gen de resistencia al PVY. El gen esta ligado a un marcador previamente publicado para Rychc encontrado en Solanum chacoense. Se cruzó M19 con un clon diploide de S. tuberosum para producir un clon adaptado llevando el gen de resistencia. A este clon híbrido se le llama M20. Este clon tuberiza en el campo, produciendo tubérculos redondos con piel y pulpa blancas, de tamaño moderado. M20 es resistente al PVYO, PVYN:O y PVYNTN. Ambos M19 y M20 son fértiles como hembra y macho, de manera que están siendo liberados como fuentes de Resistencia al PVY para los programas de mejoramiento.



This work is supported by SCRI grant number 73999-10921 from USDA National Institute of Food and Agriculture. Any opinions, findings, conclusions, or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect the view of the U.S. Department of Agriculture. The authors thank Drs. Douches and Perkins for their assistance with glycoalkaloid analysis.


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Copyright information

© The Potato Association of America 2019

Authors and Affiliations

  1. 1.Department of Bioagricultural Sciences and Pest ManagementColorado State UniversityFort CollinsUSA
  2. 2.College of Horticulture & Forestry SciencesHuazhong Agricultural UniversityWuhanChina
  3. 3.USDA-ARSAberdeenUSA
  4. 4.USDA-ARS and Section of Plant Pathology & Plant-Microbe Biology, School of Integrated Plant ScienceCornell UniversityIthacaUSA
  5. 5.USDA-ARS and Department of HorticultureUniversity of WisconsinMadisonUSA

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