The institute has many divisions dedicated to different aspects of cotton research including Agronomy, Breeding and Genetics, Cytogenetics, Physiology, Fiber Technology, Statistics and Agricultural Engineering.
He then went on to earn a Ph.D. degree in 1971 from the Banaras Hindu University for his work on "Evolution of karyotypes in snakes" in the area of Cytogenetics under the guidance of Professor Dr. S.P. Ray Chaudhuri.
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He was awarded the Dr. S. P. Basu Memorial Medal of Zoological Society, Calcutta in 1973 for his outstanding contribution to the field of Cytogenetics.
Although the cell of origin is not known, cytogenetic studies have suggested a common genetic basis for rhabdoid tumours regardless of location with abnormalities in chromosome 22 commonly occurring.
A Cytogenetics Biodosimetry Laboratory has been established within ORISE to provide capabilities for measuring radiation dose and to conduct research to improve techniques for determining the doses received by victims of radiological accidents.
Ammal’s work at the Institute on the cytogenetics of Saccharum officinarum (sugarcane) and interspecific and intergeneric hybrids involving sugarcane and related grass species and genera such as Bambusa (bamboo) were epochal.
He then served as department head of the Laboratory of Reproductive Biology and Cytogenetics Laboratory, studying quantitative cytology and histology at the teaching hospital of Strasbourg.