In the field of research, strains refer to specific genetic variants or populations of organisms that have distinct characteristics or traits. Researchers often study strains to better understand their genetic makeup, behavior, and interactions with the environment. Strain research can be important in fields such as microbiology, genetics, and animal science, as it can provide insights into disease susceptibility, evolutionary processes, and genetic diversity. Additionally, studying strains can help researchers identify potential targets for therapeutic interventions or genetic engineering.