Fig. 2. Location of QTLs for morphological traits, developmental traits and electrical conductivity on the SSRP, RFLP and AFLP-based reference genetic map of perennial ryegrass, based on the results of simple interval mapping (SIM). The maximum likelihood position of the QTL is indicated with an arrow. Bar and line lengths indicate a LOD drop of 1.0 and 2.0 respectively on either side of the maximum likelihood position.