First Java implementation of Helium showing node sizing and colouring and basic connection to our in-house Germinate barley database. Users can pan and zoom around the display and perform basic searches as well as overlay simple nominal and ordinal data which is loaded from the database backend. This version of Helium was used in subsequent user testing to steer the development of our more advanced system. The colouring in this figure shows predecessors (ancestors) in green, the line of interest in blue and descendants (successors) in purple. Figure 5A shows the main visualization window. Figure 5B shows the overview panel and Figure 5C the details panel for this interface.