inbreeding


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Related to inbreeding: Inbreeding depression, Inbreeding Coefficient

inbreeding

 [in´brēd-ing]
the mating of closely related individuals or of individuals having closely similar genetic constitutions.

in·breed·ing

(in'brēd-ing),
1. Mating between organisms that are genetically more closely related than organisms selected at random from the population.
2. A practice of mating animals that are closely related.

inbreeding

/in·breed·ing/ (-brēd-ing) the mating of closely related individuals or of individuals having closely similar genetic constitutions.

inbreeding

(ĭn′brē′dĭng)
n.
1. The breeding or mating of closely related individuals.
2. The intentional breeding of closely related individuals so as to preserve desirable traits in a stock.

inbreeding

[in′brēding]
Etymology: L, in, within; AS, bredan, to reproduce
the production of offspring by the mating of closely related organisms, the most extreme form being self-fertilization, which occurs in certain plants and animals. Inbreeding increases the chance that recessive alleles for both desirable and undesirable traits will become homozygous and be expressed phenotypically. In humans the amount of inbreeding in a specific population is largely controlled by tradition and cultural practices. Inbreeding is a standard agricultural method for developing desirable genotypes and pure lines in plants and animals. Compare outbreeding.

in·breed·ing

(in'brēd-ing)
1. Mating between organisms that are genetically more closely related than organisms selected at random from the population.
2. A practice of mating animals that are closely related.

inbreeding

Mating of the closely related. Inbreeding tends to promote similarities and to deny access to new genes. It increases the chances of offspring being HOMOZYGOUS for RECESSIVE genes and thus manifesting the effect but, in itself, has no inherent tendency to produce bad characteristics. Its reputation so to do arises from the observation of the undesirable effects of inbreeding in the genetically disfavoured.

inbreeding

any mating between relatives, which can lead to a general lowering of viability due to accumulation of deleterious genes, often in the HOMOZYGOUS state, passed on through both parents from a common ancestor. Compare OUTBREEDING.

in·breed·ing

(in'brēd-ing)
Mating between organisms that are genetically more closely related than organisms selected at random from the population.

inbreeding,

n the production of offspring by the mating of closely related individuals, organisms, or plants; self-fertilization is the most extreme form, which normally occurs in certain plants and lower animals. The practice provides a greater chance for recessive genes for both desirable and undesirable traits to become homozygous and to be expressed phenotypically.

inbreeding

the mating of closely related organisms or of organisms having closely similar genetic constitutions.

inbreeding coefficient
the probability that the two genes present at a locus in that individual are identical by descent.
inbreeding depression
depression of performance caused by inbreeding.
References in periodicals archive ?
The results of this study indicate that inbreeding can be controlled and significant genetic progress in both production and reproduction traits can be obtained by a proper selection scheme, even in a small closed population.
In most studies, the category corresponds to the regional origin of the spouses; it has been studied in various Arab and non Arab countries of Arab and Western world by measuring the inbreeding rates.
At low to medium frequencies of reproductive failure or an occurrence of failure once every 2-3 y, effects on inbreeding and genetic gain were low, but an increase could be observed.
By inbreeding during the early history of a breed to establish uniformity and "fix" certain desired traits, some degree of beef production potential (the opportunity for maximum growth and vigor) was sacrificed.
In addition, Pivotal's son Kyllachy boasts a high-flying example in this season's Dubai Golden Shaheen winner Krypton Factor, who contains two crosses courtesy of tight inbreeding to Nureyev's son Polar Falcon.
Inbreeding avoidance (inhibition of libido toward close kin) is an epigenetic adaptation that prevents excessive genetic harms from inbreeding.
While genetic surveys of adder populations have taken place in other areas of the UK, this is the first in the North East, looking initially at the Durham area, amid fears that dwindling populations will lead to inbreeding depression, a condition that could cause problems such as mutations from missing eyes to deformed spines, to adders being born dead.
He began to worry about the effects of Darwin-Wedgwood inbreeding on his own family after the death of his daughter, Annie, of tuberculosis at age 10--the second of his children to die young.
Today we are looking for areas in the genome where heterozygosity has remained in spite of inbreeding," says MacNeil.
A detailed analysis of inbreeding completed in 2007 by DairyCo found that the level of inbreeding in the Holstein population is at a very acceptable level and some 20-25 years behind levels in the US Holstein population.
But inbreeding can have its perks, says Patrick Bateson, a biologist at the University of Cambridge in England.
Unlike wild elk where inbreeding of fathers to daughters and brothers to sisters occurs, elk ranchers carefully breed their animals for desirable traits and to prevent inbreeding.