A system of breeding in which a number of genotypes which have been progeny-tested with respect to some character or group of characters are composited to form a variety.
breeding between related individuals, for example, inbreeding between first-degree relatives.
A breeding program involving the mating of rabbits that are both descended from the same animal but are related several generations back. For example: mating first cousins, uncle to niece, or aunt to nephew.
a scheme that attempts to maintain a high contribution of one or two ancestors through successive generations. Often used by breeders for any inbreeding less intensive than between first-degree relatives.
Breeding of closely related individuals to enhance certain characteristics. They are usually more than one generation distant.
Breeding of dogs of similar bloodlines not closer related than 3 generations
Within the family of any racehorse there will be some animals who were better than others. One or two sires may be picked out as having helped to produce these better offspring. A breeder may want to try to duplicate this success but is unable to use these particular stallions themselves. The next best step is to use another stallion from the same sire line (q.v.), and this practice is known as line breeding.
The mating of related dogs of the same breed, within the line or family, to a common ancestor, as, for example, a dog to his granddam or a bitch to her grandsire.
The practice of mating a dog to a member of an earlier generation of the dog's bloodline.
More remote than inbreeding, usually involving horses beyond the fourth generation. The difference in the two being “degree, not principle,” according to noted bloodstock expert Leon Rasmussen. Another definition is “a conservation program of inbreeding designed to concentrate the blood of a certain ancestor . . .
The mating of a dog within g the same breed within the same line or family, to a common ancestor. For example, mating a dog to his granddam or a btich to her grandsire.