Phytopathology 1988 | Correlation of Low Level Wheat Streak Mosaic Virus Resistance in Triumph 64 Wheat with Low Virus Titer

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Correlation of Low Level Wheat Streak Mosaic Virus Resistance in Triumph 64 Wheat with Low Virus Titer. D. L. Seifers, Plant pathologist, Fort Hays Branch Experiment Station, Hays, KS 67601; T. J. Martin, Wheat breeder, Fort Hays Branch Experiment Station, Hays, KS 67601. Phytopathology 78:703-707. Accepted for publication 8 December 1987. Copyright 1988 The American Phytopathological Society. DOI: 10.1094/Phyto-78-703.

Wheat streak mosaic virus (WSMV) reduced the yield of Triumph 64 (cultivar having a low level of resistance to virus multiplication) by 18% compared with 40% for the cultivar Centurk. Triumph 64 consistently had a lower virus titer as determined by infectivity assay and enzyme-linked immunosorbent assay (ELISA). As incubation temperature increased from 15 to 30 C, differences in relative titer between cultivars decreased. ELISA values decreased from the tip to the base in expanding leaves but were more uniform from tip to base in fully expanded leaves.