Identification of the hybrid minke whale and her female fetus based upon Bayesian cluster analysis. Each vertical line represents a single individual (which can be admixed), and each colour a genetic cluster. Columns 1–91 = B. a. acutorostrata, 92–186 = B. a. scammoni, 187–277 = B. bonaerensis, 278–286 = B. a. unnamed subspecies = “Dwarfs”, 287 = B. bonaerensis long-distance captured in the Arctic in 1996 , 288 = first documented hybrid between minke whale species captured also in the Arctic in 2007 , 289 = mother hybrid minke whale captured in 2010 documenting first pregnant hybrid between minke whale species, 290 = fetus for individual 289 representing the first documented example of back-crossing between any whale species.
Glover et al. BMC Genetics 2013 14:25 doi:10.1186/1471-2156-14-25