Foundation stock
animals that are the progenitors, or foundation, of a breed or of a given bloodline within such
Foundation stock or foundation bloodstock refers to animals that are the progenitors, or foundation, of a breed or of a given bloodline within such. Many modern breeds can be traced to specific, named foundation animals, but a group of animals may be referred to collectively as foundation bloodstock when one distinct population (including both landrace breeds or a group of animals linked to a deliberate and specific selective breeding program) provides part of the underlying genetic base for a new distinct population.
Terminology
The terms for foundation ancestors differ by sex, most commonly "foundation sire" for the father and "foundation dam" for the mother. Depending upon the species in question, more specialized terms may be used, such as foundation mare for female horses, foundation queen for female cats, or foundation bitch for female dogs.
The offspring of genetically dissimilar parents or stock, whether of different species or different breeds are technically called hybrids. In Mendelian genetics, the foundation generation is the first set of unrelated parents ("P") to be mated to one another. A first generation hybrid descendant from these parents is called a F1 hybrid (F1) or filial 1 hybrid, with subsequent generations designated F2 and so on.
Related concepts include:
Founder effect - the loss of genetic variation that occurs when a new population is established by a very small number of individuals from a larger population. It is a special case of genetic drift, where subsequent generations may have less genetic variation than the original population, which leads to fixation. On one hand, fixed traits are what creates a standardized breed of animal, but if the level of inbreeding becomes significant, it can make the new population more vulnerable to extinction.
The public source identifies “Foundation stock” as animals that are the progenitors, or foundation, of a breed or of a given bloodline within such. This brief keeps that definition visible, then builds a research path around Foundation, stock and animals.
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Vocabulary and entity names are the principal evidence signals here, because they determine the precision of every later search. The source revision retrieved here is dated May 18, 2026. The linked authority identifier is Q115518477. None of the 0 selected statements returned an explicit reference.
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This entry incorporates text from “Foundation stock” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.