BMC Genomics 2006, 7:283 http://www.biomedcentral.com/1471-2164/7/283 7_A 7_B 7_B 7_A BFoigvuGreen4RH map of BTA 7 (left) compared with the corresponding MARC 2004 linkage map and Btau_2.0 (right) BovGen RH map of BTA 7 (left) compared with the corresponding MARC 2004 linkage map and Btau_2.0 (right). Red dashes represent corresponding marker positions, black dashes non-corresponding positions. Lines between the maps connect markers common in both maps. For an improved legibility only marker names common in both maps are dis- played. Locations of discussed marker groups are marked and the orientation of the group 7_A indicated by arrows. Distances on the BovGen RH map are scaled in cR, on the MARC 2004 map in cM. Page 8 of 15 (page number not for citation purposes)