Fig. 5.

Acquisition of MSY genes by transposition from chr3. a Adjacent location of single SH3TC1 and HTRA3 in horse chr3 (http://www.ensembl.org/); b Close location of 2 copies of SH3TC1Y and 3 copies of HTRA3Y in eMSY sequence map; c FISH with eMSY BAC 139C20 containing SH3TC1Y and HTRA3Y in horse metaphase chromosomes; hybridization signals are present in eMSY and chr3qter (arrows); scale bar 1 µm; d–e Maximum likelihood phylogeny with bootstrap support values showing the clustering of three copies of SH3TC1Y and HTRA3Y in eMSY with their autosomal paralogs indicating recent divergence