describing a strain produced through successive generations of inbreeding resulting in a population of genetically identical individuals which are homozygous at all genetic loci
Animals that result from the process of at least twenty sequential generations of brother-sister matings This process is called inbreeding (see Chapter 3) See Inbred Strain in the MGI Glossary
A group of organisms so highly inbred as to be genetically identical, except for sexual differences Brother sister matings have been maintained for 20 or more generations
a strain produced through successive generations of inbreeding resulting in a population of genetically identical individuals which are homozygous at all genetic loci
A relatively true breeding strain resulting from at least five successive generations of controlled self fertilization or of back-crossing to a recurrent parent with selection or its equivalent
The mating between animals that are more closely related than the average relationship in the breed In common usage, inbreeding refers to matings between close relatives, such as father to daughter, brother to sister, and half-brother to half sister Planned breeding programs often use this strategy of breeding to concentrate desired genes in the breeding stock, and fix a "type", or "look" It is a process that exposes both the good and bad qualities in the stock If the strain does carry a mutant, recessive gene (harmful or beneficial), it is more likely to become apparent sooner with inbreeding The school of thought is that, although this might result in a high rate of defective kittens in the short term, the negative trait's exposure (and elimination from the program) in the long term is in the best interests of the breed
Inbreeding is the repeated breeding of closely related animals or people. In the 19th century, inbreeding nearly led to the extinction of the royal family. when children, animals, or plants are produced from closely related members of the same family. Mating of closely related individuals. The opposite is outbreeding, the mating of unrelated organisms. Inbreeding is useful in keeping desirable characteristics or eliminating undesirable ones, but it often results in decreased vigour, size, and fertility of the offspring because of the combined effect of harmful genes that were recessive in both parents (see recessiveness). The closest type of inbreeding is self-fertilization. In linebreeding, mates are selected on the basis of their relationships to a certain superior ancestor. The backcross (crossing a first-generation hybrid with one of the parental types) is a common method of inbreeding
General term used to describe the mating of fish within family groups Successive inbreeding can lead to deformities and other problems Can be avoided by keeping stocks of several different families separate and always breeding between families
mating among related individuals - mating of close relatives, which reduces genetic diversity, often leading to expression of deleterious recessive characteristics and reduction of fitness in the offspring
In an animal species, breeding between the same or closely related stocks, which reduces genetic diversity and can cause undesirable recessive characteristics to appear
Used for the same reasons as line breeding but involves breeding closely related animals, such as father to daughter or full brother to full sister Outcross: Adds genetic diversity and "hybrid vigor" but also makes offspring's characteristics hard to predict and inconsistent