inbreeding

inbreeding
/in"bree'ding/, n. Biol.
the mating of closely related individuals, as cousins, sire-daughter, brother-sister, or self-fertilized plants, which tends to increase the number of individuals that are homozygous for a trait and therefore increases the appearance of recessive traits.
[1835-45; INBREED + -ING1]

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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.

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      the mating of individuals or organisms that are closely related through common ancestry, as opposed to outbreeding, which is the mating of unrelated organisms. Inbreeding is useful in the retention of desirable characteristics or the elimination of 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.

      The closest type of inbreeding is selfing, or self-fertilization, the union of male and female sex cells produced by the same organism. Linebreeding is a form of inbreeding that involves selection of mates 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.

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Universalium. 2010.

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Look at other dictionaries:

  • Inbreeding — is breeding between close relatives, whether plant or animal. If practiced repeatedly, it leads to an increase in homozygosity of a population. A higher frequency of recessive, deleterious traits in homozygous form in a population can, over time …   Wikipedia

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  • inbreeding — inbreeding. См. инцухт. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • inbreeding — (n.) c.1842, from IN (Cf. in) + BREEDING (Cf. breeding) …   Etymology dictionary

  • inbreeding — [[t]ɪ̱nbriːdɪŋ[/t]] N UNCOUNT 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 …   English dictionary

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  • Inbreeding — Inbreed In*breed , v. t. [imp. & p. p. {Inbred}; p. pr. & vb. n. {Inbreeding}.] [Cf. {Imbreed}.] [1913 Webster] 1. To produce or generate within. Bp. Reynolds. [1913 Webster] To inbreed and cherish . . . the seeds of virtue. Milton. [1913… …   The Collaborative International Dictionary of English

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