INSTITUT FÜR PFLANZENGENETIK UND KULTURPFLANZENFORSCHUNG (IPK)
Corrensstraße 3, 06466 Gatersleben, Germany, and
NORDSAAT Saatzuchtgesellschaft mbH *
Hauptstraße 1, D-38895 Böhnshausen, Germany.
A. Börner, O. Unger *, and A. Meinel *.
Durable adult-plant resistance to rust diseases.
The inheritance of adult-plant disease resistance was studied in four segregating populations produced using two lines resistant to stripe rust (Lgst.79-74 and Lgst.209-75) crossed with the cultivar Winzi (susceptible to stripe rust) and two lines resistant to leaf rust (Lgst.386-72 and N-POL-2) crossed with the cultivar Alcedo (susceptible to leaf rust). The four resistant lines are characterized by susceptibility to the actual virulent races at the seedling stage tested in the greenhouse, indicating that no specific resistance gene is present. However, the lines are resistant to a mixture of the most virulent races at the adult plant stage.
The F1 hybrids obtained produced F2 self seed. From each cross, 150-160 F2 plants were grown to get F3 families, which were analyzed for their resistance at the seedling and adult plant stages. The seedling tests were performed in the greenhouse by inoculating 20 seedlings per F3 family. The adult-plant resistance was tested in the field during the 1997 or 1998 growing season with double rows of the F3.
The F3 progenies segregated for stripe rust resistance in a ratio of 1:3 (resistant:susceptible) for the 'Lgst.79-74 / Winzi' cross, indicating a monogenic inheritance. In contrast, no resistant F3 families were observed in the 'Lgst.209-75 / Winzi' cross. The susceptible progenies had a normal distribution, indicating polygenic control of the adult-plant resistance of Lgst.209-75. The F3 progenies of the two crosses segregating for adult-plant leaf-rust resistance show both major gene-segregation patterns, although the mode of inheritance of the resistance was different. Although the resistance of Lgst.386-72 was inherited as a recessive, N-POL-2 was found to have a dominant leaf rust-resistance gene. The results give clear evidence that major genes for controlling nonspecific durable resistance against stripe and leaf rusts are available in wheat. Because of the qualitative inheritance, molecular markers should be useful for marker-assisted selection.
Publications.
Börner A. 1998. Comparative molecular mapping of agronomically important genes. In: Proc 9th Int Wheat Genet Symp (Slinkard AE ed). University Extension Press, Saskatoon, Canada. 1:20-23.
Börner A. 1999. Comparative genetic mapping in Triticeae. In: Proc VIIth Int Symp, International Organisation of Plant Biosystematics 'Plant Evolution in Man-Made Habitats', Amsterdam, The Netherlands, 1998 (In press).
Börner A and Korzun V. 1998. A consensus linkage map of rye (Secale cereale L.) including 375 RFLPs, 25 isozymes and 14 gene loci. Theor Appl Genet 97:1279-1288.
Börner A, Ben Amer IM, and Korzun V. 1998. Wheat genetic stocks and gene mapping. In: Proc 10th EWAC Conference, Viterbo, Italy, 1997. Eur Wheat Aneuploid Coop Newslet pp.65-68.
Börner A, Korzun V, and Worland AJ. 1998. The detection and mapping of agronomically important genes of wheat. In: Proc 10th EWAC Conference, Viterbo, Italy, 1997. Eur Wheat Aneuploid Coop Newslet pp. 153-155.
Börner A, Korzun V, and Worland AJ. 1998. Comparative genetic mapping of mutant loci affecting plant height and development in cereals. Euphytica 100:245-248.
Börner A, Unger O, and Meinel A. 1998. Genetics of durable adult plant disease resistance against rusts. In: Proc 9th Int Wheat Genet Symp (Slinkard AE ed). University Extension Press, Saskatoon, Canada. 3:225-227.
Börner A, Unger O, and Meinel A 1999. Genetics of durable adult plant resistance to rust diseases in wheat (Triticum aestivum L.). In: Proc XV EUCARPIA Congress 'Genetics and Breeding for Crop Quality and Resistance', Viterbo, Italy, 1998 (In press).
Börner A, Voylokov A, and Korzun V. 1998. Intrachromosomal mapping of mutant loci in cereals and their homoeologous relationships. In: Proc Int Symp 'Current Topics in Plant Cytogenetics Related to Plant Improvement', Tulln, Austria, 1997. pp. 236-242.
Börner A, Korzun V, Polley A, and Melz G. 1998. Genetics and molecular mapping of a male fertility restoration locus (Rfg1) in rye (Secale cereale L.). Theor Appl Genet 97:99-102.
Börner A, Korzun V, Voylokov AV, and Weber WE. 1999. Detection of quantitative trait loci on chromosome 5R of rye (Secale cereale L.). Theor Appl Genet (In press).
Börner A, Korzun V, Malyshev S, Ivandic V, and Graner A. 1999. Molecular mapping of two dwarfing genes differing in their GA response on chromosome 2H of barley. Theor Appl Genet (In press).
Ivandic V, Malyshev S, Korzun V, Graner A, and Börner A. 1999. Comparative mapping of a gibberellic acid insensitive dwarfing gene (Dwf2) on chromosome 4HS in barley. Theor Appl Genet (In press).
Korzun V, Malyshev S, Pickering RA, and Börner A. 1999. RFLP mapping of a gene for hairy leaf sheath using a recombinant line from Hordeum vulgare L. x Hordeum bulbosum L. cross. Genome (In press).
Korzun V, Malyshev S, Kartel N, Westermann T, Weber WE, and Börner A. 1998. A genetic linkage map of rye (Secale cereale L.). Theor Appl Genet 96:203-208.
Sobek R, Korzun V, Röder MS, and Börner A. 1998. Microsatellite markers of wheat in Aegilops accessions of the Gatersleben genebank collection. In: Proc 9th Int Wheat Genet Symp (Slinkard AE ed). University Extension Press, Saskatoon, Canada. 2:349-351.
Specht C-E and Börner A. 1998. Results of a long term storage test with rye (Secale cereale L.) at different storage temperatures and media. Genet Resources and Crop Evol 45:483-488.
Specht C-E, Freytag U, Hammer K, and Börner A. 1998. Survey of seed germinability after long term storage in the Gatersleben genebank (part 2). Plant Genet Resources Newslet 115:39-43.
Stracke S and Börner A. 1998. Molecular mapping of the photoperiod response gene ea7 in barley. Theor Appl Genet 97:797-800.
Voylokov AV, Korzun V, and Börner A. 1998. Mapping of three self-fertility mutations in rye (Secale cereale L.) by using RFLP, isozyme and morphological markers. Theor Appl Genet 97:147-153.
Worland AJ, Börner A, Korzun V, Li WM, Petrovic S, and Sayers EJ. 1998. The influence of photoperiod genes to the adaptability of European winter wheats. Euphytica 100:385-394.