At the Roslin Institute of the University of Edinburgh, we are researching how to manage and improve populations using statistics, genetics, and selection. In the presentation I will describe the basic concept of our field and describe one example of the use of statistics, selection and genetics. As an example of the use of statistics, I will describe the use of phenotypic and genomic data to estimate the genetic values ​​of cattle and how these estimates are used in practice. As an example of the use of selection, I will describe the optimization of an insect breeding program specific to the black military fly used for protein production. As an example of the use of genetics, I will describe “gene drive” modeling to stop the spread of gray squirrels in the UK.