English

Noun

counterselection ‎(plural counterselections)

1. selection that removes unwanted characteristics
   • 2015 July 11, “Novel recA -Independent Horizontal Gene Transfer in Escherichia coli K-12”, in PLOS ONE, DOI:10.1371/journal.pone.0130813:

     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)