Lineage or pedigree — the hereditary line or ancestry, often used for animals, breeds, or family descent.
彼の犬は優れた血統だ。
His dog has an excellent pedigree.
このレースでは血統の良い馬が注目される。
In this race, horses with good bloodlines are favored.
家の血統を調べるために戸籍をたどった。
I traced the family register to research our family lineage.
彼は血統書付きの猫を買った。
He bought a cat with pedigree papers.