INTRACHROMOSOMAL MAPPING OF GENES FOR DWARFING (RHT12) AND VERNALIZATION RESPONSE (VRN1) IN WHEAT BY USING RFLP AND MICROSATELLITE MARKERS

For intrachromosomal mapping of the dominant GA-sensitive dwarfing gen e Rht12 and the vernalization response gene Vrn1 On chromosome 5A, an F-2 population was established using a wide (synthetic) wheat cross. I n addition to restriction fragment length polymorphism (RFLP) probes f our microsatellite markers were incorporated. Rht12 was mapped distall y to four RFLP loci (Xmwg616, Xpsr164, Xwg114, Xpsr1201) and three mic rosatellite markers (Xgwm179, Xgwm410, Xgwm291), known to be located o n the segment of chromosome 5AL which was ancestrally translocated and is homoeologous to Triticeae 4L. The map position of Rht12 suggests t hat it is homoeologous to the dominant GA-sensitive dwarfing gene Ddw1 , present on chromosome 5RL. The vernalization response gene Vrn1 show ed linkage to Xwg644, as might be expected from comparative maps.