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Resistance

Resistance to Wheat Streak Mosaic Virus and its Vector, Aceria tulipae. T. J. Martin, Assistant Professor of Plant Pathology, Fort Hays Branch Experiment Station, Hays, Kansas 67601; T. L. Harvey(2), and R. W. Livers(3). (2)(3)Professor of Entomology, and Professor of Plant Genetics, respectively, Fort Hays Branch Experiment Station, Hays, Kansas 67601. Phytopathology 66:346-349. Accepted for publication 18 September 1975. DOI: 10.1094/Phyto-66-346.

Wheat-Agropyron elongatum lines (C.I. 15321, C.I. 15322) were resistant to both wheat streak mosaic virus (WSMV) and its vector, the wheat curl mite. A few mites developed on each line but the plants did not develop virus symptoms. Wheat lines developed from crosses with C.I. 15321, and selected for resistance to WSMV after mechanical inoculation tests, were as resistant to the mite as C.I. 15321. F₁ plants appeared to have an intermediate reaction to mites. Mites developed readily on C.I. 15092, a wheat-A. intermedium line but it remained resistant to WSMV. Salmon, a wheat-rye translocation line carrying a segment of rye chromosome 1R, was highly resistant to the wheat curl mite but susceptible to WSMV. The mite resistance was inherited as a dominant characteristic.