Please, Im humbly asking for anyone's suggestion. If you have a research problem on your minds, please share it to me guys,, I really need it. Thanks...
Try researching the variation among edible solanacea within their endemic ranges. That ought to keep you occupied for a bit...
The ranges in which they occur naturally (ie without humans having moved them around) For example, you'd look at potatoes, but only within the Ecadorian/Bolivian/Peruvian plateaux where they originated.