Definition of introgression in English:
introgression
noun ˌɪntrə(ʊ)ˈɡrɛʃ(ə)nˌintrəˈɡreSHən
mass nounBiology The transfer of genetic information from one species to another as a result of hybridization between them and repeated backcrossing.
Example sentencesExamples
- To introduce desirable genes from blue catfish into channel catfish through introgression, a genetic linkage map is helpful.
- In the absence of selection against genetic introgression, the incipient species should fuse.
- Therefore, there is the potential for gene introgression across species via backcross of hybrid females to the parental species.
- The two populations allow for a comparative phenotypic analysis of species-specific genome introgressions in a common genetic background.
- This would rule out scenarios of numt evolution involving horizontal transfer or introgression between species.
Derivatives
adjective
Biology It is possible that the inland plants Hodgdon called variety typica represent introgressive hybrids between L. pulchella and L. intermedia.
Example sentencesExamples
- Because hybrids are usually fertile, they can often produce introgressive hybrids with the parental species or triple hybrids with another taxa.
- Incongruence among data sets can arise from various biological processes, including introgressive hybridization, recombination, and gene conversion.
- For instance, introgressive events, even when rare, may be more important than mutations as a source of novel genetic variability within taxa.
- Plant biologists have long been comfortable with the notion that ‘good species’ can still exchange some genes via introgressive hybridization as have biologists concerned with hybrid zones.
Origin
Mid 17th century: from Latin introgredi 'step in', from intro- 'to the inside' + gradi 'proceed, walk', on the pattern of egression, ingression.