Step 1: The Institute of Forest Genetics and Tree Breeding (IFGTB) is an institute under the Indian Council of Forestry Research and Education, dedicated to research on tree genetics, breeding and forest biotechnology.
Step 2: IFGTB is situated in Coimbatore, Tamil Nadu, a city that also hosts other major agricultural and plant research institutes such as the Sugarcane Breeding Institute.
Step 3: Jorhat, Jodhpur and Jabalpur host different research institutions (tea research, arid zone research, and forestry-related colleges respectively), not IFGTB.
Step 4: So the correct answer is Coimbatore.