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[in-truh-gresh-uh n] /ˌɪn trəˈgrɛʃ ən/
noun, Genetics.
the introduction of genes from one species into the gene pool of another species, occurring when matings between the two produce fertile hybrids.
Also called introgressive hybridization
[in-truh-gres-iv] /ˌɪn trəˈgrɛs ɪv/ (Show IPA)
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 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for introgression
  • Or, one or the other may have experienced introgression at that locus and so diverged after domestication.
  • Additionally, pre-sapient species likely had their own adaptations which could plausibly have jumped through introgression.
British Dictionary definitions for introgression


the introduction of genes from the gene pool of one species into that of another during hybridization
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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