in·​tro·​gres·​sion ˌin-trə-ˈgre-shən How to pronounce introgression (audio)
: the entry or introduction of a gene from one gene complex into another (as by hybridization)
introgressant adjective or noun
introgressive adjective

Examples of introgression in a Sentence

Recent Examples on the Web However, genomic segments bearing important agronomic traits originated only once in one population and spread across all cultivars through introgression and human selection. Razib Khan, Discover Magazine, 13 June 2011 First, a post from the past: Neandertal & humans – introgression. Razib Khan, Discover Magazine, 5 Feb. 2011 Rose said Oxitec expected the introgression. Melody Petersenstaff Writer, Los Angeles Times, 8 Apr. 2022 Intersubspecific introgression is pervasive in these strains, and contamination by laboratory stocks has played a role in this process. Razib Khan, Discover Magazine, 31 May 2011 Indeed, in contrast to neutral alleles, adaptive variants may attain high frequencies by natural selection after minimal genetic introgression. Razib Khan, Discover Magazine, 23 Apr. 2010 Ed Yong has a good good review of a new Neandertal introgression/admixture paper in PNAS. Razib Khan, Discover Magazine, 12 Sep. 2011 This is important, because signals of admixture and introgression have resulted in wildly different implications about the origins of domestic cultivars, at least from my cursory reading of this literature. Razib Khan, Discover Magazine, 4 Oct. 2012 Strong reproductive isolation between humans and Neanderthals inferred from observed patterns of introgression. Ed Yong, Discover Magazine, 12 Sep. 2011 See More

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'introgression.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History


intro- + -gression (as in regression)

First Known Use

1938, in the meaning defined above

Time Traveler
The first known use of introgression was in 1938

Dictionary Entries Near introgression

Cite this Entry

“Introgression.” Dictionary, Merriam-Webster, Accessed 1 Oct. 2023.

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