introgression

noun
in·​tro·​gres·​sion | \ˌin-trə-ˈgre-shən \

Definition of introgression 

: the entry or introduction of a gene from one gene complex into another (as by hybridization)

Other Words from introgression

introgressant \ ˌin-​trə-​ˈgre-​sᵊnt \ adjective or noun
introgressive \ ˌin-​trə-​ˈgre-​siv \ adjective

First Known Use of introgression

1938, in the meaning defined above

History and Etymology for introgression

intro- + -gression (as in regression)

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The first known use of introgression was in 1938

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