Meaning of introgression in English:


Pronunciation /ˌɪntrə(ʊ)ˈɡrɛʃ(ə)n/


mass nounBiology
  • The transfer of genetic information from one species to another as a result of hybridization between them and repeated backcrossing.

    ‘Therefore, there is the potential for gene introgression across species via backcross of hybrid females to the parental species.’
    • ‘This would rule out scenarios of numt evolution involving horizontal transfer or introgression between species.’
    • ‘In the absence of selection against genetic introgression, the incipient species should fuse.’
    • ‘To introduce desirable genes from blue catfish into channel catfish through introgression, a genetic linkage map is helpful.’
    • ‘The two populations allow for a comparative phenotypic analysis of species-specific genome introgressions in a common genetic background.’


Mid 17th century from Latin introgredi ‘step in’, from intro- ‘to the inside’ + gradi ‘proceed, walk’, on the pattern of egression, ingression.