Figure 8

The 246 rearrangement steps necessary to transform A. gossypii chromosome I into chromosomal segments that are homologous in S. cerevisiae according to the PGD scenario. The diagram was obtained directly from GRIMM. Black horizontal bars show groups of genes rearranged at each step and are analogous to the yellow bars described in Additional File 2 for DS block 7. Vertical colored lines indicate chromosome segment ends ("caps") and show effect of fusions and fissions. Chromosomal segments of source and destination genomes are colored as in Figure 1. Note that rearrangements involving the largest number of genes (bottom of diagram) are roughly centered on the centromere (located at the right hand side of DS block 9).