Zootechnical improvements can be done through the environment or improved genetics. Both variables are important and necessary, and when possible it should be done simultaneously. The animal is the result of its genes and its environment. The expression of this characteristic is milk production or meat, for example. It depends on the joint action of the inheritance that the animal received from parental genetics and environmental conditions in which it is maintained throughout his life.
The environment includes factors such as general management, weather, facilities, food availability, food quality, the presence or absence of disease factors, among other things.
Genetic improvement is a set of selection processes to establish the frequency of the best desirable genes in a population.
Therefore, an important variable for genetic introduction and improvement is to establish a harmonious relationship with the environment. Therefore, animals could express their genetic potential to the maximum, at a lower cost and in the shortest amount of time possible, optimizing production, quality and available resources.