One importance in breeding agriculture plants is to improve the plant's yield, resistance against diseases, and ability to survive in cold conditions.
<em>(I'm assuming the question is asking what the importance is of artifically breeding plants, not literally breeding next to some plants. that would be weird)</em>
It might knock the old theory away completely because all of the new knowledge doesn't support the theory or it could change it because some of the new information supports the old stuff.
