From satellites to the milking parlor: National Aeronautics and Space Administration prediction of worldwide energy resources as an information source for the national genetic evaluation of heat stress tolerance in Holstein and Gir cattle.

Abstract excerpt

Heat stress is a major constraint to dairy productivity in tropical regions, where environmental conditions frequently exceed thermoneutral thresholds. The primary objective of this study was to quantify heat-related milk yield losses and estimate genetic parameters for thermotolerance in Brazilian Holstein and Gir cattle. In addition, because routine national genetic evaluations require complete and consistent...

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