Erratum: correction of Figure 2 legend Sam Rose, BioMed Central 24 December 2014 On behalf of senior author Vladimir Trifonov: Part of Figure 2 has already been published before in an article we published in 2005. It is cited in the manuscript as reference : Graphodatsky AS, Kukekova AV, Yudkin DV, Trifonov VA, Vorobieva NV, Beklemisheva VR, Perelman PL, Graphodatskaya DA, Trut LN, Yang F: The proto-oncogene C-KIT maps to canid B-chromosomes. Chromosome Res 2005, 13:113–122. Thus, the phrase "our unpublished data" on page 4 is not correct. We thank Dmitry V. Yudkin for indicating the error. Competing interests No competing interests.