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Heterokaryon Transfer of Viruslike Particles and a Cytoplasmically Inherited Determinant in Ustilago maydis. H. A. Wood, Associate Virologist, Boyce Thompson Institute for Plant Research, 1086 North Broadway, Yonkers, New York 10701; R. F. Bozarth, Virologist, Boyce Thompson Institute for Plant Research, 1086 North Broadway, Yonkers, New York 10701. Phytopathology 63:1019-1020. Accepted for publication 16 February 1973. DOI: 10.1094/Phyto-63-1019.

Spherical viruslike particles (VLPs) which measured 41 nm in diam, were found in all Ustilago maydis strains which carry a cytoplasmically inherited factor for resistance to a killer toxin. Heterokaryon transfer of the VLPs accompanied the transmission of this cytoplasmic factor.