Genes for Adult-Plant Resistance to Leaf Rust in Soft Red Winter Wheat

Plant Disease
Yeshi A Wamishe, Eugene A Milus

Abstract

Host plant resistance in wheat (Triticum aestivum) has been the principal means of managing leaf rust caused by Puccinia triticina. The need for durable resistance has changed the focus from the use of seedling resistance to adult-plant resistance. The objectives of this study were to determine the genetic basis for adult-plant resistance and to determine the most effective method to identify adult-plant resistance genes Lr12, 13, and 34 among 116 contemporary soft red winter wheat cultivars and breeding lines. Adult-plant resistance was detected by inoculating flag leaves with a race that was virulent on seedlings. Approximately 90% of the lines expressed resistance under controlled conditions. It was postulated that the adult-plant resistance in 67 lines was due in part to either Lr12, 13, or 34; the adult-plant resistance detected in 17 lines was attributed to Lr12 based on a distinctive low infection type very similar to that on the isoline TcLr12; the adult-plant resistance in 27 lines was attributed to Lr34, as all of these lines expressed a "leaf tip necrosis" in the field (a phenotype controlled by a gene known to be tightly linked with Lr34); and the adult-plant resistance in 23 lines was attributed to Lr13 based on a ...Continue Reading

References

Jan 1, 1996·Annual Review of Phytopathology·J A Kolmer
Oct 24, 2008·Phytopathology·R P SinghJ Huerta-Espino
Jun 1, 1992·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·S E German, J A Kolmer
Feb 1, 2004·Plant Disease·Yeshi A Wamishe, Eugene A Milus
Jan 1, 2000·Plant Disease·A L BarcellosM I B de Moraes-Fernandes

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Citations

Mar 7, 2006·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·C-G ChuS S Xu
Feb 11, 2012·Plant Biotechnology Journal·Joanna M RiskBeat Keller
Dec 15, 2015·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Peng ZhangUrmil Bansal

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