Abstract
Data were analyzed on the Kenana, a Bos indicus breed of cattle indigenous to northern Sudan. Cattle were kept at Um Banein in a hot dry tropical environment 13°.04 latitude north at an altitude of 435m. Analyzed were lactation yield (1597kg), lactation length (264), calving interval (530), and annual lactation yield (1225kg). Between 1966 and 1980 all these traits except lactation length were significantly affected by lactation number and year. None was significantly influenced by the season in which lactation started. Kenana have considerable potential in the Sudan environment as a dairy breed, but further selection and an open nucleus system of breeding to introduce additional genetic material is required to express this potential.
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