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New molecular markers linked to qualitative and quantitative powdery mildew and scald resistance genes in barley for dry areas |
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| Authors: | Haitham Sayed Gunter Backes Hamed Kayyal Amor Yahyaoui Salvatore Ceccarelli Stefania Grando Ahmad Jahoor Michael Baum |
| Institution: | 1. The International Center for Agricultural Research in the Dry Areas (ICARDA), P.O. Box 5466, Aleppo, Syria 2. Plant Research Department, Ris? National Laboratory, P.O. Box 49, DK-4000, Roskilde, Denmark 3. Faculty of Agriculture, Damascus University, Damascus, Syria |
| Abstract: | A partial genetic linkage map was constructed on 71 doubled-haploid lines derived from a cross between the barley lines Tadmor and WI2291 with 181 molecular markers. The segregating population was used to detect markers linked to the gene Mlg conferring resistance to powdery mildew (Erysiphe graminis f. sp. hordei) and to genes for quantitative resistance to scald (Rhynchosporium secalis). The gene Mlg on chromosome 4H was flanked by two AFLP markers at a distance of 2.0 and 2.4 cM, respectively. QTLs for resistance to scald were detected on chromosomes 2H and 3H. This association of molecular markers with qualitative and quantitative disease resistance loci represents a valuable starting-point for marker-assisted selection. This revised version was published online in July 2006 with corrections to the Cover Date. |
| Keywords: | barley (Hordeum vulgare L ) Erysiphe graminis f sp hordei genetic linkage map Rhynchosporium secalis Quantitative Trait Loci (QTL) |
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