Marker-Assisted Selection Introduction
Conventional plant breeding is dependent on appropriate environmental conditions in which to identify and select desirable plants. Typically, breeders improve crops by crossing plants with desired traits, such as high yield or disease resistance, and selecting the best offspring over multiple generations of testing. A new variety could take 8 to 10 years to develop. Breeders are very interested in new technologies to speed up this process or make it more efficient.
Molecular marker technology offers such a possibility. Marker-assisted selection involves selecting individuals based on their marker pattern (genotype) rather than their observable traits (phenotype) (Fig. 1).
This lesson will describe the requirements for conducting a MAS program in crop plants, discuss some of the advantages and drawbacks of MAS, and outline the methods used to select for markers linked to qualitative (single gene) or quantitative (multigenic) traits. The viewer is assumed to be familiar with DNA molecular markers and quantitative trait locus (QTL) analysis. For a review of these topics, please consult other lessons in the Library of Crop Technology, including:
Be the first to write a comment...