Doctor of Philosophy in Genetics. The program furnishes the students with firm background in Biology with specialization in genetics. It also prepares the student for competence in instruction, research and extension. For admission to the Ph.D. program he must hold an M.S. degree in the biological sciences and must have taken at least 6 units of intermediate genetics courses.

Doctor of Philosophy in Botany. The program develops the ability of the students to undertake critical inquiry and independent research, to widen their field of knowledge, as well as to develop their professional leadership. The fields of specialization are: morphology-anatomy, systematics, plant physiology, pollination biology, phycology and plant ecology.

Ph.D. by research in Botany. The program is offered to qualified candidates who have already learned a substantial experience in research. It is aimed to improve further the research skills of the candidate in the areas of morphology/anatomy and systematics under the professional guidance of specialists.

Doctor of Philosophy in Microbiology. The program aims to produce highly qualified graduates needed primarily in learning and research institutions and industries. They shall possess in-depth skills in solving specific problems in microbiology in the context of providing the basic needs of man: food, health and energy. In addition, they should be capable of analyzing problems in microbiology, stimulating critical inquiry and conducting independent research.

Doctor of Philosophy in Statistics. The graduate student is expected to have a wide exposure to actual problems in statistical theory and methods through practicum in statistical consultation. As an option, the student may choose to gain experience in university-level teaching. This involves assisting in a course or courses for one semester.

Doctor of Philosophy in Computer Science. Two modes are offered: the residential mode and the research mode. The program is envisioned to develop and enhance advanced scholarship in applied and theoretical computer science, and to train and develop quality manpower for computer science education and the computer industry in the Philippines.

Doctor of Philosophy in Agricultural Chemistry. The program provides a comprehensive training in advanced Agricultural Chemistry. A minimum of four semesters and one summer of residence is required; this is equivalent to satisfying 24 units of course work beyond the M.S. degree with at least 28 units in the graduate level.

Doctor of Philosophy in Biochemistry. The Ph.D. in Biochemistry program aims to provide an in-depth understanding of the basic concepts as well as the fast accumulating new body of knowledge in biochemistry. With this program, capability to undertake a thorough and intensive research in problem areas like plant and animal nutrition, biotechnology, industrial bioprocesses and environmental studies will be enhanced, thus supporting the national goal of industrialization and sustainable productivity. A minimum of six semesters of residence is required for the degree. The candidate must have 24 units of course work and 2 graduate seminars. Cognate courses may be in any of the following areas: nutrition, physiology, genetics, microbiology, plant, animal and food sciences.