Abstract
Resistance to soil-borne viruses as Soil-borne Wheat Mosaic Virus (SBWMV) has gained evident importance in wheat research and breeding. Very few varieties of bread and durum wheat are resistant to these viruses. Search for new sources of SBWMV is conducted worldwide and loci causing resistance have been described on the B and D genomes of tetraploid and hexaploid wheat. In the present study, a gene locus was identified on the A genome of Triticum monococcum and was successfully transferred to hexaploid wheat. In hexaploid wheat, it is expressed in a stable dominant manner. As this is the first SBWMV resistance gene located on the A genome, this locus is proposed as Sbm3.
Highlights
Soil-borne viruses, such as wheat mosaic virus (SBWMV), became a serious threat for European wheat production
Resistance to Soil-borne Wheat Mosaic Virus (SBWMV) on the phenotypic level was tested both under controlled conditions in the greenhouse and in the fields that are contaminated with the various viruses, as described above and in several reports (Kastirr et al 2004, 2006; Kastirr and Ziegler 2018)
Two plants of F1BC2-1, four plants of F1BC2-3, and one plant of F1BC2-6 were resistant to SBWMV
Summary
Soil-borne viruses, such as wheat mosaic virus (SBWMV), became a serious threat for European wheat production. SBWMV is considered to be one of the most important diseases in winter wheat, especially in the central and eastern US, while in Germany it was found on few fields (Kastirr and Ziegler 2018). It is persistent and can practically destroy an entire crop of a susceptible cultivar when the weather conditions are favourable for disease development (Myers et al 1993). Koenig and Huth (2000; 2003) were the first to report on severe damages of wheat caused by SBWMV in Germany. Since the diversity with respect to resistance in the group of hexaploid wheats is limited, resources from related genera can be an alternative
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