breeding progress
difference in the genetic average performance of a population compared to the previous generation
en-GB/ˈbɹiːdɪŋ ˈpɹəʊɡɹɛs/
en-US/ˈbɹidɪŋ ˈpɹɑɡˌɹɛs/
difference in the genetic average performance of a population compared to the previous generation