The transplantation of graft between genetically identical individuals is called an isograft. In this type of grafting, the donor and the recipient are from the same species and have identical genetic makeup. This minimizes the chances of tissue rejection, as the immune system of the recipient recognizes the graft as "self" and does not mount an immune response against it.

Option 1, Autograft, refers to the transplantation of tissue from one part of the body to another part on the same individual. Option 3, Allograft, involves the transplantation of tissue between individuals of the same species, but with different genetic makeup. Option 4, Xenograft, involves the transplantation of tissue between individuals of different species.

Overall, isografts have a higher success rate compared to other types of grafts due to the genetic similarity between the donor and recipient.