introgression
noun
in·tro·gres·sion
ˌin-trə-ˈgre-shən 
: the entry or introduction of a gene from one gene complex into another (as by hybridization)
Examples of introgression in a Sentence
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Limits of long-term selection against Neandertal introgression Jack Knudson is an assistant editor at Discover with a strong interest in environmental science and history.
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Jack Knudson, Discover Magazine, 18 Mar. 2025
More recently, preliminary work by Taylor’s team has helped reveal the genetics underlying some of the deficits other scientists have observed in hybrids: genes related to metabolism and cognition show especially low rates of introgression.
—Rebecca Heisman, Scientific American, 17 Sep. 2024
These hybrid zones are often quite stable over time, with insignificant introgression, or breeding back, to the parent populations.
—Richard Pallardy, Ars Technica, 30 July 2024
Every bird sampled on Oahu, Maui, and Hawaii had hybrid ancestry, indicating that mallard introgression had resulted in a hybrid swarm.
—Richard Pallardy, Ars Technica, 30 July 2024
Intriguingly, many of the hybrids most closely resemble the red shiner—a phenomenon called cryptic introgression.
—Richard Pallardy, Ars Technica, 30 July 2024
This is called introgression, which occurs when genetic information is transferred from one lineage or species to another as the result of hybridization.
—Elizabeth Rayne, Ars Technica, 22 May 2024
No evidence for introgression/admixture at this locus.
—Razib Khan, Discover Magazine, 19 Nov. 2019
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
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Jack Knudson, Discover Magazine, 18 Mar. 2025
More recently, preliminary work by Taylor’s team has helped reveal the genetics underlying some of the deficits other scientists have observed in hybrids: genes related to metabolism and cognition show especially low rates of introgression.
—Rebecca Heisman, Scientific American, 17 Sep. 2024
These hybrid zones are often quite stable over time, with insignificant introgression, or breeding back, to the parent populations.
—Richard Pallardy, Ars Technica, 30 July 2024
Every bird sampled on Oahu, Maui, and Hawaii had hybrid ancestry, indicating that mallard introgression had resulted in a hybrid swarm.
—Richard Pallardy, Ars Technica, 30 July 2024
Intriguingly, many of the hybrids most closely resemble the red shiner—a phenomenon called cryptic introgression.
—Richard Pallardy, Ars Technica, 30 July 2024
This is called introgression, which occurs when genetic information is transferred from one lineage or species to another as the result of hybridization.
—Elizabeth Rayne, Ars Technica, 22 May 2024
No evidence for introgression/admixture at this locus.
—Razib Khan, Discover Magazine, 19 Nov. 2019
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
Cite this Entry
“Introgression.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/introgression. Accessed 23 Jul. 2025.
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