Which is the most common method of obtaining improved variety of crops?

The most common method of obtaining improved varieties of crops is through conventional breeding, which involves selecting parent plants with desirable traits and cross-pollinating them to produce offspring with enhanced characteristics. This process can include techniques like hybridization and backcrossing. Additionally, modern approaches such as genetic modification and marker-assisted selection are increasingly used to expedite the development of improved crop varieties. Overall, these methods aim to enhance traits like yield, disease resistance, and environmental adaptability.