A Matter of Selection

I believe that the reason there are so much domestic variability in brassica oleracea because we can genetically modify the genes (which is related to selective breeding) of each plant to make billions of variations of the original plant. When they use artificial selection on the plants the could create a whole new plant. also the have come in contact with many different biomes and ecosystems of the world and so if two of the same plant ate in different ecosystems the two plants will adapt differently.the will also adapt with different mutations corresponding to the environment.