Tachi is a disease resistant hybrid tomato variety. OK, don't freak out it's not a GMO plant. Its just a hybrid. Hybrid seeds take a lot of work to make because the growers have to breed different varieties with different traits over many generations to get a plant that does all that the grower wants it to do. and GMOs use frog genes to make the plants into aliens...JK JK
Back to the Tachi...it's a hybrid, determinate Roma-type with resistance to root knot nematode and tomato spotted wilt virus. A very productive variety that fruits well in hot and humid conditions.