The underlying principles in the use of marker assisted selection (MAS) in crop improvement hold true whether or not mutants are used in the improvement
programme, namely that MAS could make varietal selection more efficient. The decision to apply MAS would normally depend on some estimation of the comparative advantages.
This implies therefore that it would take a while before MAS is applied uniformly on a global scale. We at the Joint FAO/IAEA Programme encourage our counterpart plant breeders in
member states to adopt MAS when it leads to greater efficiency in varietal selection. Currently on account of the varying capacities, not all national programmes are able to adopt this strategy
while amongst those using MAS, there is also a wide variation in the scope of application. And finally, when induced mutations form part of an improvement scheme (just like in all crop
improvement strategies), while the use of MAS could be advantageous, it doesn't have to be always used in order to efficiently generate new varieties especially if it is a lot easier or cheaper
to use phenotypic data to trace the inheritance of the trait in question. In actual fact, experience shows that the greatest benefits are derived when MAS is used in concert with phenotypic
selection.