What is marker-assisted selection?

Marker-assisted selection is a breeding technique that utilizes molecular markers to identify and select plants or animals with desirable traits, such as disease resistance, drought tolerance, or improved yield. This method involves analyzing specific DNA sequences, or markers, that are linked to traits of interest. By using these markers, breeders can efficiently select individuals that carry the desired traits without needing to wait for the traits to express in later generations.

This technique enhances the breeding process by allowing for the selection of the best candidates earlier in development and often increases the precision of breeding programs. As a result, marker-assisted selection can accelerate the development of improved crop varieties or livestock.

In contrast, the other options do not accurately describe what marker-assisted selection entails. While crop sizes may be influenced by breeding techniques, it does not encapsulate the specific genetic approach that marker-assisted selection embodies. Organic farming typically centers on sustainable practices and avoidance of synthetic chemicals, which is not related to marker-assisted genetics. Lastly, classifying agricultural seeds does not pertain to the specific technique of selecting traits through molecular markers, making it distinct from the concept of marker-assisted selection.