Can anyone succinctly explain how one differs from the otherand why a breeder would use one over the other?
Very good illustrations in the form of diagrams differentiating among conventional breeding, marker assisted selection, marker assisted recurrent selection, and marker assisted back crossing are posted in the Integrated Breeding Platform (IBP). Here are the links for those:
https://www.integratedbreeding.net/marker-assisted-selection
https://www.integratedbreeding.net/marker-assisted-recurrent-selection
https://www.integratedbreeding.net/marker-assisted-back-crossing
MAS- Method of selection of desired trait using linked marker gene which helps in easy selection of desired trait indirectly based on linked marker.
MARS- Type of MAS used in recurrent selection. Recurrent selection is type of selection which is basically involves increasing the frequency of desired characters in a population.
Recurrent selection is defined as reselection generation after generation, with intermating of selected plant to produce the population for the next cycle of selection.
Recurrent selection is widely regarded as an effective strategy for the improvement of polygenic traits.
Recurrent selection is an efficient breeding method for increasing the frequency of superior genes for various economic characters.
It helps in maintaining high genetic variability due to repeated intermating of heterozygous population.
MARS is a scheme which allows performing genotypic selection and intercrossing in the same crop season for one cycle of selection
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