Definitions for "Line breeding"
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.