hybrid

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The Columbia Encyclopedia, Sixth Edition | 2008 | The Columbia Encyclopedia, Sixth Edition. Copyright 2008 Columbia University Press. (Hide copyright information) Copyright

hybrid , term applied by plant and animal breeders to the offspring of a cross between two different subspecies or species, and by geneticists to the offspring of parents differing in any genetic characteristic (see genetics ). The mule , the hybrid steer, and hybrid corn are examples of hybrids produced by breeders, but some animal species may cross-breed in the wild, as the gray wolf and coyote sometimes do. Hybridization between cultivars or varieties is often used in agriculture to obtain greater vigor or growth (heterosis). Hybrid vigor is achieved by crossing two inbred strains (see breeding ). The first generation shows greatly increased vigor and a better yield primarily because many genes for recessive, often deleterious, traits from one parent are masked by corresponding dominant genes in the other parent.

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hybrid

A Dictionary of Nursing | 2008 | © A Dictionary of Nursing 2008, originally published by Oxford University Press 2008. (Hide copyright information) Copyright

hybrid (hy-brid) n. the offspring of a cross between two genetically unlike individuals. A hybrid, whose parents are usually of different species or varieties, is often sterile.

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