In production resources and market requirements.ġ. Genetic diversity should be maintained to help meet the potential challenge resulting from changes Why are we concerned about preserving information about minor, or relatively unknown, breeds of livestock?Ī. They have developed a resistance to trypanosomiasis or sleeping sickness EXAMPLE: N'dama cattle from west Africaġ. Other breeds have traits that result from natural selection pressure based upon the environment in are the highest milk producing cattle in the worldī. In some breeds you can see the amount of change that can occur as the result of selection for aġ. → decides when a group of individuals constitutes a 'breed'ĭevelopment of Breeds – different routes:Ī. Perception of the breeders and the livestock industry It is their word and the breeders common usage is what we must accept as the correct definitionĪ.
a term which arose among breeders of livestock, created one might say, for their own use, and no one is warranted in assigning to this word a scientific definition and in calling the breeders wrong when they deviate from the formulated definition. Lush:Ī breed is a group of domestic animals, termed such by common consent of the breeders. of Animal Science – Breeds of LivestockĪnimals that, through selection and breeding, have come to resemble one another and pass those traits uniformly to their offspring.īreed – The Genetics of Populations by Jay L.
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