When you do this with horses and dogs, it's called inbreeding or line breeding.

An open registry was maintained with restricted line breeding.

The best blues are produced from line breeding of good blue specimens of shubunkins.

Males return from their wintering areas to establish territories on spruce-willow timber line breeding grounds in April.

Line breeding, or mating the offspring with its own parents, enhances certain desired physical characteristics, but "tends to take the brains out of them," he said.

Plant breeders make use of a number of techniques to produce hybrids, including line breeding and the formation of complex hybrids.

At the same time, the JRTCA discouraged inbreeding and eventually restricted line breeding to a set percentage.

In plant and animal breeding, procedures have been developed which deliberately utilise the effects of dispersion (such as line breeding, pure-line breeding, back-crossing).

Mr. Leavitt began his project in 1971 utilizing the cattle line breeding scheme of Dr. Fechimer from Ohio State University.

Seeing this, those who bred the Zhen Zhus began line breeding their fish to develop faster and become more colorful, in order to compete with the Kamfa strains.

Plant and animal breeders utilise these properties routinely, and have devised breeding methods especially to do so (e.g. line breeding, pure-line breeding, backcrossing).

This is usually achieved easily enough by line breeding, though if the mutated genes are not dominant only a percentage of each brood is likely to be of the new form.

Excessive levels of inbreeding is caused by a small founding population (see founder effect), the deliberate use of inbreeding (including line breeding) to fix desired characteristics, and closed stud books.

The ABA claims to hold the oldest, largest and most complete genealogy database for the American Bulldog, and provide line breeding shown in percentages on the pedigrees they research.

For maternal line breeding gilts, the traits by order of importance are: Structure and soundness, Growth, Underline quality, Capacity or volume, Degree of muscling, Degree of leanness.

I'm sure you recognized that 25-50-25 distribution as representing the most drastic case of inbreeding, one which can happen only half the time with line breeding, only a quarter of the time with full siblings, in both cases through chromosome reduction at meiosis.