MOLECULAR MAPPING OF GENES DETERMINING HEIGHT, TIME TO HEADING, AND GROWTH HABIT IN BARLEY (HORDEUM-VULGARE)

A combination of random amplified polymorphic DNA (RAPD) and restricti on fragment length polymorphism (RFLP) markers has been used to locate genes controlling important developmental characters in barley. The d ense dwarfing gene has been mapped to the long arm of chromosome 3H. S tepwise multiple regression was also used to identify another region o f the barley genome (on chromosome 7H), which contributed to variation in height. The dense locus was shown to be associated with delaying t ime to heading. A protein (WSP2) and an RAPD marker on barley chromoso mes 5H and 6H, respectively, were also associated with time to heading . These results are discussed in relation to the genetic analysis of d evelopmentally important traits and the development of dwarfing genes in barley breeding programs.