There are small variations only. When a disease hit the plantations here in the Philippines a couple years ago, they replaced the crop with a different strain. That is what they are trying to do in the articles.
And yes, there are many variations, but the example would be like Great Danes, Pekingese, and beagles...very different but still the same species.
And yes, there are many variations, but the example would be like Great Danes, Pekingese, and beagles...very different but still the same species. Hip dysplasia in German Shepherds and other large breeds.
cf. - The incidence of sickle cell anemia in non-Negro races.