1. relating to or involving introgression; describing the process by which genetic material from one species is incorporated into the gene pool of another species through repeated backcrossing.
Usage: biology; genetics

Examples

• Introgressive hybridization has allowed some wild plant species to acquire herbicide resistance from cultivated crops.
• The introgressive flow of genes between the two wolf populations created a hybrid zone.
• Scientists studied introgressive patterns in the fish populations to understand evolutionary adaptation.
• Introgressive backcrossing is a common technique in plant breeding programs.
• The introgressive events in this species complex occurred over thousands of years.