Fig. 2

Pedigree representing a family of SAS affected (a) Newfoundlands, (b) Bullmastiffs, (c) Golden Retrievers, and (d) Rottweilers. These pedigree figures were originally reported in Stern, et al. and Ontiveros, et al. manuscripts [23, 33]. In the pedigree, square represent males, circles represent females, white squares or circles represent unaffected dogs, black squares or circles denote affected dogs, gray squares or circles denote equivocal dogs, striped square or circles also represent equivocal dogs, and square or circles with a question mark denote missing phenotypic information for those dogs