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A Novel Rust Resistance Gene in Maize Showing Overdominance

March 1998 , Volume 11 , Number  3
Pages  242 - 245

Donna E. Delaney , Craig A. Webb , and Scot H. Hulbert

Department of Plant Pathology, Kansas State University, Manhattan 66506-5502, U.S.A.

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Accepted 3 December 1997.

The Rp8 rust resistance locus of maize is unique in that only Rp8-A/Rp8-B heterozygotes provide resistance and homozygotes are susceptible. A third allele, Rp8-C, provides no resistance in homozygotes or heterozygous combinations. Rp8 maps to the long arm of chromosome 6, near the restriction fragment length polymorphism marker umc21.

© 1998 The American Phytopathological Society