Summary
Originally developed for resistance to greenbug derived from Insave rye, Amigo wheat carries two genes for resistance to stem rust. One of these genes is associated with a rye chromosome 1RS segment carrying the Sec-1 protein marker and presumably greenbug resistance. The second gene which is genetically linked to leaf rust resistance is associated with an Agropyron-derived segment. Rust tests in Canada confirmed that these genes were Sr24 and Lr24. In contrast to Agent and certain 3D/Ag derivatives from Dr. E.R. Sears, the Amigo source of Sr24/Lr24 freely recombined with white seed colour during backcrossing.
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The, T.T., Gupta, R.B., Dyck, P.L. et al. Characterization of stem rust resistant derivatives of wheat cultivar Amigo. Euphytica 58, 245–252 (1991). https://doi.org/10.1007/BF00025256
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DOI: https://doi.org/10.1007/BF00025256