From a publication on crossbreeding:
Bill Lamberson, John Massey and Jack C. Whittier Department of Animal Sciences, University of Missouri-Columbia
Composites are a stable intermating population originating from crossbred matings. Santa Gertrudis and Brangus are examples, as are the MARC composites developed at the U.S. Meat Animal Research Center. Composites usually incorporate a combination of breeds, each of which contributes a characteristic desirable for good performance or environmental adaptation.
> You might consider contacting the
> national breed associations for
> Brangus, Murray Grey, or Santa
> Gertrudis to discuss their
> experiences -- each of those are
> now recognized "breeds"
> that are essentially the result of
> crossbreeding two
> "original" breeds of