Figure 3.

Putatively fused chromosomes in B. mori. Six B. betularia LGs share gene content with distinct sections on three B. mori chromosomes. This suggests three fusion events in B. mori that would account for the haploid chromosome number reduction from the presumed ancestral n=31 to n=28. The gene order between B. betularia LG11 and its orthologous region in B. mori is rearranged such that the upper half of B. betularia LG29 is inversed relative to B. mori. The remaining LGs (23, 24, 30 and 31) have gene orders identical to B. mori. Punch is linked with an interrupted line because part of the gene is assigned to a different chromosome in the B. mori genome sequence, presumably because of a sequence assembly error.