The phrase "different bloodlines" means that individuals or animals come from different families or ancestors, which can have an impact on their traits, characteristics, or genetic makeup. Full definition
Saudi Arabia, for example, does not take refugees, and if Arabs of different bloodlines want to marry there, it is not permitted, etc., etc.. (nakedpastor.com)
Ask experienced pit bull breeders to explain the different lines, traits and qualities of famous lines such as Carver, Rednose, Palladin and Zebo and ask to see dogs from different bloodlines, suggests the National Dog Breeders Council of SA. (cuteness.com)
While similarities in appearance and temperament are present, these two breeds are in fact of completely different bloodlines. (animalso.com)