Construct · 1 fields · 1 citations

introgression: a standalone construct

One name. One construct. A landmark on the map.

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introgression1 CONSTRUCTIntrogressionANDERSON & HUBRICHT · 1938

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Evolutionary genetics

Genes seep across a species line by backcrossing

In evolutionary genetics, introgression is the movement of genes from one species into the gene pool of another through hybridisation followed by repeated backcrossing to a parent species, so that foreign alleles persist in an otherwise distinct lineage. It can transfer adaptations across species boundaries and leaves a genomic trace of mixed ancestry. Anderson and Hubricht coined the term (introgressive hybridisation) in their 1938 study of Tradescantia. The construct is the lasting leakage of genetic material across a species boundary via hybrids, not a one-off hybrid nor ordinary within-species gene flow.[1]

Unit
The proportion of one species' genome derived from another via backcrossed hybrids
Recovery means
Not applicable
Measured by
Detected by admixture statistics and ancestry inference across the genome, and historically by intermediate character indices

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Nearby constructs

reticulation1 fields · 1 citationsanchor · a standalone constructboundary4 fields · 4 citationsjingle · one word, four constructscline2 fields · 2 citationsjingle · one word, two constructs

References

  1. Anderson, E., & Hubricht, L. (1938). Hybridization in Tradescantia. III. The evidence for introgressive hybridization. American Journal of Botany, 25(6), 396–402. https://doi.org/10.1002/j.1537-2197.1938.tb09237.x

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