Here I am giving you name of some best colleges or institutes are situated in India that offer admission in PHD with biotech below

Jadavpur University, Calcutta, West Bengal
University of Calcutta
Banaras Hindu University
Institute of Bioinformatics and Biotechnology, University of Pune
Department of Biotechnology, Institute of Engineering & Technology, Lucknow
Department of Genetics, Delhi University
School of Biotechnology, Jawhar Lal Nehru, University.
Rajiv Gandhi Centre for Biotechnology, Thiruvananthapuram
Institute of Chemical Technology,Mumbai
Tezpur University, Sonitpur
Jamia Hamdard (Hamdard University), New Delhi
Banaras Hindu University, Varanasi
Shivaji University, Kolhapur
Indian Institute of Technology, Mumbai
University of Hyderabad, Hyderabad
Guru Gobind Singh Indraprastha University, New Delhi
Tamil Nadu Agricultural University, Coimbatore
National Dairy Research Institute,,Karnal
Kumaun University, Bhimtai
Burdwan University, Burdwan