Domestication of root and cereal crops is notably associated with the increase of starch production. Several studies on cereals suggest that starch biosynthesis and storage were important targets for selection . In our study, we observed the selection of two genes involved in the production of sugar: SUS4 and SPS1. SUS catalysis is the first step leading to starch formation  by converting sucrose to fructose and UDP-glucose. In wheat, selection for increased starch content was associated with selection of SUS genes , and enhancing SUS activities also resulted in increasing starch content in maize . The SPS gene has also been reported to play a major role in sucrose biosynthesis under osmotic stress conditions . In conclusion, similar set of genes were selected during cereal, root and tuber crops.