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The Epic Interactive Encyclopedia 1998
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Epic Interactive Encyclopedia, The - 1998 Edition (1998)(Epic Marketing).iso
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Hybrid
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1992-09-02
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14 lines
The offspring from a cross between
individuals of two different species, or two
inbred lines within a species. In most cases,
hybrids between species are infertile and
unable to reproduce sexually. In plants,
however, doubling of the chromosomes (see
polyploid) can restore the fertility of such
hybrids. Hybrids between different genera are
extremely rare; an example is the leylandii
cypress which, like many hybrids, shows
exceptional vigour, or heterosis. In the
wild, a `hybrid zone' may occur where the
ranges of two related species meet.