selective breeding
• (n.) The breeding of special stocks or races.
Stir'pi·cul`ture noun [ Latin stirps , stirpis , stem, stock, race + cultura culture.] The breeding of special stocks or races. 
stirpiculture 1. The application of selective breeding laws to improve a species of plants or animals. 2. The production of pure races or stocks of animals by careful breeding.
the production of special stocks or strains by careful breeding.