Further examination of the mitochondrial DNA and Y-chromosome phylogenetic trees revealed a complex interplay between canine and wolf lineages. Imprints on Physique and PersonalityThe researchers found that wolf genes are linked to a variety of dog traits, most notably body size. Larger dogs tend to have more wolf ancestry, and certain working breeds, such as Arctic sled dogs, wild-dog breeds, and hunting dogs, are more likely to have this trait. Notably, among large service dogs, the influence of wolf ancestry varied greatly among breeds. The Sarabi Dog, Central Asian Shepherd Dog, and Anatolian Shepherd Dog, which are livestock guard dogs from Turkey and Central Asia, inherited 0.5-1.2 percent of their genes from wolf ancestors, while Neapolitan Mastiffs, Bull Mastiffs, and St. Bernards showed almost no trace of wolf ancestry