Flavr-Savr tomatoes were developed to have a delayed over-ripening property so that they remained fresh in the retail trade for a longer period of time. They have not been available since the 1990’s. A blackening of the insides of tomato fruit is most likely blossom-end-rot occasioned by a deficiency of calcium during fruit development. When available, Flavr-Savr tomatoes were voluntarily labeled to inform consumers of the unique product benefits.
Qhttp://gizmodo.com/the-original-genetically-modified-tomato-youll-never-e-559924439 "But where Calgene explicitly labeled their altered tomatoes, Monsanto took over huge markets of staple crops without marking any of their products as genetically modified