Early generation selection
By discarding most genotypes that lack certain desirable traits at an early stage, the number of plants tested in the next generation in the field is reduced (or kept the same, but with a higher proportion of promising genotypes). This can be achieved using MAS.
|
|
Early generation selection scheme using MAS (right) as compared to the conventional pedigree method (left). With MAS, only desirable F3 lines are planted in the field. Since fewer F3 lines are planted, more individual plants may be planted per F3 line. This further increases the probability of selecting superior individuals and allows more crosses to be evaluated at the same time. (Source: B. Collard & D. Mackill (2006).)
Summary
→ In early generation selection, MAS may help to discard many plants that lack important traits that are difficult to test phenotypically.
I want extra explanation | Move on to: Marker-assisted backcrossing