genetic hitchhiking

https://doi.org/10.1351/goldbook.14713
Situation in which a scored locus is acting only as a marker for a closely linked gene that is actually responsible for the difference in tolerance among genotypes. More generally, it is the condition "in which a given allele changes in frequency as a result of linkage or gametic phase disequilibrium with another selected locus".
Source:
PAC, 2009, 81, 829. (Glossary of terms used in ecotoxicology (IUPAC Recommendations 2009)) on page 890 [Terms] [Paper]