parentage vs breed line

parentage and breed line both are nouns.

Word	Noun	Adjective	Verb	Adverb
parentage	Yes	No	No	No
breed line	Yes	No	No	No

As nouns, breed line is a hyponym of parentage; that is, breed line is a word with a more specific, narrower meaning than parentage:

parentage: the hereditary derivation of an individual
breed line: Breed line is offspring from the mating or breeding of individuals or organisms that are closely related genetically.

Other hyponyms of parentage include family, family line, folk, kinfolk, kinsfolk, phratry, sept, side.

parentage (noun)	breed line (noun)
the hereditary derivation of an individual	Breed line is offspring from the mating or breeding of individuals or organisms that are closely related genetically.
the kinship relation of an offspring to the parents
the state of being a parent