Layout types. Barley pedigree for Quench which is a commonly used high yielding spring malting variety from Syngenta. It is a cross between Sebastian and Drum. A. shows the standard Sugiyama-style layered layout using dot and B. the same data using the fdp force-directed layout. Both layout tools are from GraphViz. The traditional pedigree top to bottom topology is lost using force-directed layout algorithms.