Types of event. Types of deletion event affecting less than three pre-existing runs. Red and blue shading distinguishes between deletions from the two homeologous chromosomes. Grey areas represent previous deletions from either chromosome. White area indicates run of undeleted terms. Lightly shaded area indicates run of previously deleted terms. Darker area represents current deletion event. Hatched striped area above lightly shaded area indicates either previous deletions from both homeologous chromosomes, or only from the homeolog not affected by the current deletion. A: creates one new run with r = 1. B: lengthens left hand run to r + 1 events. C: lengthens right hand run to r + 1 events. D and E: merge two runs to create a single run with r + s + 1 deletion events.
Sankoff et al. BMC Genomics 2012 13(Suppl 1):S8 doi:10.1186/1471-2164-13-S1-S8