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Effect of Seedborne Potato virus Y on Performance of Russet Burbank, Russet Norkotah, and Shepody Potato

March 2004 , Volume 88 , Number  3
Pages  248 - 252

Phillip Nolte , University of Idaho, Idaho Falls 83402 ; Jonathan L. Whitworth , United States Department of Agriculture-Agricultural Research Service, Aberdeen, ID 83210 ; Michael K. Thornton , University of Idaho, Parma 83660 ; and Christopher S. McIntosh , University of Idaho, Idaho Falls 83402

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Accepted for publication 3 October 2003.

Potato virus Y (PVY) is one of the most important of the potato viruses, but little is known about the impact on yield of seedborne infection levels below 100%. Blending infected and healthy seed from different seed lots introduces the variable of performance differences between the seed lots, which may obscure the effect of virus alone. Seed lots containing various levels of seedborne PVY (0, 2, 10, 20, and 50% incidence of infected tubers) were created by combining in different proportions seed pieces from healthy and infected tubers from the same seed source. These seed lots were planted in replicated field plots at the University of Idaho Parma R & E Center in Parma, ID from 1995 to 1997. Regression analyses on data from the three consecutive seasons indicate that seedborne PVY has virtually the same negative impact on yield for all three cultivars.

Additional keywords: seedborne virus

© 2004 The American Phytopathological Society