Counterselection

Origin

- + selection

Full definition of counterselection

Noun

1. selection that removes unwanted characteristics
• July 11, 2015, , Novel recA -Independent Horizontal Gene Transfer in Escherichia coli K-12, In all recipients, distant drug resistance markers streptomycin (SmR; rpsL104), chloramphenicol (CmR; recA::cat(FRT)), and/or nalidixic acid (NlR; gyrA96) were used for counterselection.
2. (biology) dysgenic selection (that has the opposite effects of natural selection)