Residual feed intake selection makes cattle leaner and more efficient
Published:August 31, 2011
Summary
Summary Residual feed intake (RFI) is a measure of feed efficiency. It is the difference between the amount of feed eaten by an animal over a test period and the amount of feed predicted or expected to have been eaten by the animal based on its size and level of production. By this measure of efficiency, animals that eat less than expected have a negative RFI and are considered more efficient....
An important review of the work to date.It reinforces the need for a full profile of breeding values including female fertility & sub-cutaneous fat if selection for profit is to be undertaken. The challenge of course is how to get estimates for individual animals. Hopefully genomics will be the answer but probably only for the Angus breed in the short term.
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