(1980) analyzed the karyotypes of three Bos species where they observed the number, form, and configuration of gayal chromosomes were different from yellow cattle (Bos taurus) and gaur (Bos gaurus) and their numbers of chromosomes were 58, 60, and 56, respectively.
Both NJ and MP trees demonstrated that gayals in this study were markedly divided into three embranchments: one embranchment clustering with Bos gaurus, another clustering with Bos taurus, and the third clustering with Bos indicus.