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introgression

[in-truh-gresh-uh n]
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noun Genetics.
  1. the introduction of genes from one species into the gene pool of another species, occurring when matings between the two produce fertile hybrids.
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Origin of introgression

1930–35 (earlier in literal sense of L); < Latin intrōgress(us), past participle of intrōgredī to go in, enter (intrō- intro- + -gred-, combining form of grad(ī) to proceed, walk + -tus past participle suffix, with -dt- > -ss-) + -ion
Also called in·tro·gres·sive hybridiza·tion [in-truh-gres-iv] /ˌɪn trəˈgrɛs ɪv/.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for introgression

introgression

noun
  1. the introduction of genes from the gene pool of one species into that of another during hybridization
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012