Marker Assisted Selection (MAS) in Animal Breeding: A Review

Marker-Assisted Selection (MAS) is a used for indirect selection of superior breeding animals. MAS depend on identifying association between genetic marker and linked Quantitative traits loci (QTL).The association between marker and QTL depend on distance between marker and target traits. As soon as markers linked to QTL have been identified, they can be used in selection programme. This use of marker in selection is called Marker-Assisted Selection. MAS is beneficial when the traits are difficult and expensive to measure and low heritability and recessive traits. MAS facilitate the exploitation of existing genetic diversity in breeding populations and can be used to improve desirable traits in livestock. Marker-Assisted Selection (MAS) is the most widely used application of marker systems in breeding.