Molecular mapping and cloning of genes and QTLs

The barley genome is comprised of more than 39,000 high-confidence genes, which represent many valuable targets for breeders as well as plant researchers trying to understand the genetic network controlling the various grass species, especially members of the Triticeae tribe including barley, wheat, and rye. The present chapter provides an overview of how past activities with barley mutants, markers, and genetic maps have laid the foundation for the present physical map based on the barley genome. We also describe how this new genome sequence resource can be integrated with mapping approaches to facilitate the cloning of genes and quantitative trait loci (QTL). Although the cost of genomic sequencing is likely to decrease, we assume that mapping of genes deficient in mutants will remain an important approach for gene identification. We present a comprehensive list of barley genes identified up to 2017