The Tamil Nadu Rice Research Institute (TRRI) is an Indian research institute working in the field of rice under Tamil Nadu Agricultural University (TNAU). Situated in Aduthurai, in Thanjavur district, it was established in April, 1985 in TNAU to meet the research requirements of the region with the help of existing Agricultural Colleges and Research centres and perform lead function for rice and rice based cropping system research. TRRI coordinate the research programmes of all the stations of the state on rice and rice based cropping system research. This directorate responsible for coordinating research in the Region II of the TNAU.