Resistance to the H Strain of Sugarcane Mosaic Virus Among Wild Forms of Sugarcane and Relatives. M. P. Grisham, Research Plant Pathologist, U.S. Department of Agriculture, Agricultural Research Service, Sugarcane Research Unit, Houma, LA 70361-0470. D. M. Burner, and B. L. Legendre. Research Geneticist, and Research Agronomist, U.S. Department of Agriculture, Agricultural Research Service, Sugarcane Research Unit, Houma, LA 70361-0470. Plant Dis. 76:360-362. Accepted for publication 16 October 1991. This article is in the public domain and not copyrightable. It may be freely reprinted with customary crediting of the source. The American Phytopathological Society, 1992. DOI: 10.1094/PD-76-0360.

One hundred and three clones of sugarcane relatives, including Saccharum interspecific hybrids, were inoculated with the H strain of sugarcane mosaic virus (SCMV) in two greenhouse experiments. Wild relatives included Erianthus spp., S. spontaneum, S. barberi/S. sinense, S. officinarum, and S. robustum. Among the six taxa represented in the first experiment, Erianthus, S. spontaneum, and S. barberi/S. sinense clones were the most resistant and S. robustum clones were the most susceptible, with the interspecific hybrid and S. officinarum clones intermediate. Clones in the second experiment, which were predominantly S. spontaneum, were assigned to one of three groups that reflected their geographic origin. The mean percent infection differed (P < 0.05) among the clones from India (6%), the Philippines (21%), and Indonesia (42%).