Utilization and Performance in Wheat of Yellow Dwarf Virus Resistance Transferred From Thinopyrum Intermedium

Abstract

Barley yellow dwarf virus (BYDV - previously PAV) and cereal yellow dwarf virus (CYDV - previously RPV) which cause the yellow dwarf (YD) disease are serious pathogens of the small cereal grain crops like barley, wheat, oat, and rye in many cereal-growing areas of the world. Highly effective resistance to yellow dwarf viruses was introgressed into wheat (Triticum aestivum) from Thinopyrum intermedium. A translocation line containing the Th. intermedium-derived Bdv3 locus for YD virus resistance was identified during inbreeding to adapted soft winter wheat. Two selections from this germplasm line P961341 (Ohm et al. 2005) were released as the cultivars INW0315 and INW0316. These lines have excellent grain yield and soft wheat milling and baking qualities. They also have resistance to an array of other diseases, including Soil borne mosaic virus and the fungal diseases: powdery mildew, stem rust, stripe rust and tan spot. Current research is in progress to shorten the 7E translocation segment yet retain the YD resistance that is on this segment