Model of chromosomal rearrangements of the Ph2 locus in rice, Brachypodium , Ae. tauschii and barley. 1-5 indicate chromosomal segments, A-D, the putative breakpoints. The breakpoint B would be located within the ctg5 of Ae. tauschii physical map. The names on top are rice genes as listed in MSU Rice Genome Annotation (Osa1) Release 6.0.