Summary
Common and durum wheat populations obtained from Sweden and originally collected in Ethiopia were screened for resistance to steum rust and leaf rust. Resistant selections of common wheat were crossed and backcrossed with either stem rust susceptible RL6071, or leaf rust susceptible Thatcher. Genetic studies, based largely on tests of backcross F2 families, showed that four of the selections had in common a recessive gene SrA. Plants with this gene were resistant (1+ infection type) to all stem rust races tested. This gene was neither Sr26 nor Sr29. The resistance of other selections, based on tests with an array of rust isolates, was due to various combinations of Sr6, 8a, 9a, 9d, 9c, 11, 13, 30, and 36. One of the selections had linked genes, Lr19/Sr25. Another selection had a dominant gene for resistance (;1 infection type) to all the races of leaf rust. With the possible exception of this gene for leaf rust resistance and SrA, no obviously new resistance was found.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Bekele, E., 1984. Analysis of regional patterns of phenotypic diversity in the Ethiopian tetraploid wheats. Hereditas 100: 131–154.
Dyck, P.L. & P.E.Jedel, 1989. Genetics of resistance to leaf rust in two accessions of common wheat. Can. J. Plant Sci. 69: 531–534.
Long, D.L. & J.A.Kolmer, 1989. A North American system of nomenclature for Puccinia recondita f. sp. tritici. Phytopathology 79: 525–529.
McIntosh, R.A., 1988. A catalogue of gene symbols for wheat. p. 1225–1323. In: T.E.Miller & R.M.D.Koebner (Eds). Proc. 7th Int. Wheat Genetics Symp. Institute of Plant Science Research, cambridge, UK.
Negassa, M., 1987. Possible new genes for resistance to powdery mildew, Septoria glume blotch and leaf rust of wheat. Plant Breeding 98: 37–46.
Nyquist, W.E., 1962. Differential fertilization in the inheritance of stem rust resistance in hybrids involving a common wheat strain derived from Triticum timopheevi. Genetics 47: 1109–1124.
Roelfs, A.P. & J.W.Martens, 1988. An international system of nomenclature for Puccinia graminis f. sp. tritici. Phytopathology 78: 526–533.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Dyck, P.L., Sykes, E.E. The inheritance of stem rust and leaf rust resistance in some Ethiopian wheat collections. Euphytica 81, 291–297 (1995). https://doi.org/10.1007/BF00025620
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF00025620