The phrase "brood stock" refers to a group of mature animals that are used for breeding purposes to produce offspring with desirable traits. Full definition
Sam is very selective in his use of brood stock. (si.com)
They recommended the implementation of a systematic approach to brood stock management and dissemination to ensure the effective use and sustainability of the strain. (sciencedaily.com)
You will end up having the worse bloodline if you start with a poor brood stock and inbreed them. (breedingbusiness.com)