Tagging of an Aegilops speltoides Derived Leaf Rust Resistance Gene Lr28 with a Microsatellite Marker in Wheat

摘要

Leaf rust resistance gene Lr28 has been transferred form Aegilops speltoides into bread wheat on chromosome 4AL. To identify the molecular markers linked to Lr28 the available microsatellite markers for wheat chromosome arm 4AL were surveyed on nearisogenic lines (NILs) of Triticum aestivum cultivars having Lr28 gene, other Lr genes and susceptible cultivars. A null allele of Xgwm 160 marker was found to be associated with Lr28. Linkage between the marker and the Lr28 resistance gene was confirmedusing F_2 mapping population of cross PBW343 and HD2329 + Lr28.