define breeding population. what is the difference between a breed, a population and a species?

A group of individuals which are selected from a wild population to be used in a breeding programme is called breeding population.  Normally they show phenotypically superior characteristics or desired in the new population. 

Breed is a stock of animals within a species which shows distinctive appearance or characteristics and has been developed by careful selection. 

Population refers to particular type, section of people livig in a geographical area. 

Species refers to a group of organisms which are capable of interbreeding and producing viable offsprings.