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United States Department of Agriculture
Abstract
In various parts of the Gulf Coast region of the United States attempts are being made to combine through breeding the recognised resistant qualities of Brahman cattle to tropical and sub'tropical conditions with the superior beef-producing qualities of our major beef breeds.
These attempts represent rather wide species crosses of the Bos taurus and Bos indicus cattle. The author (2) had previously reported observations made in Brazil indicating a species difference in the manner in which Bos taurus and Bos indicus cattle respond to high external temperatures and humidity. Regan and Richardson (1) at California have shown that there exists breed differences within the Bos taurus species to withstand high temperatures and humidities.
At the Iberia Livestock Experiment Farm, Jeanerette, Louisiana the U. S. Department of Agriculture initiated studies to determine the degree of resistance of Bos taurus and Bos indicus cattle and their crossbred types to some of the more important climatic factors.
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