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Understanding Selective Breeding in Domesticated Animals

Selective breeding is a method used in animal husbandry where breeders develop cultivated breeds over time by choosing animals with specific desirable traits for reproduction. This concept, which gained prominence with Charles Darwin's "Origin of Species," emphasizes the importance of genetic characteristics in species such as finches on the Galapagos Islands. Techniques include inbreeding, linebreeding, and outcrossing, each serving unique purposes in enhancing desirable qualities, often aiming for excellence in show dogs, cattle, and racehorses.

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Understanding Selective Breeding in Domesticated Animals

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  1. Who is natural? A B

  2. BOTH!! But How? SELECTIVE BREEDING

  3. Definition • “in domesticated animals is the process of a breeder developing a cultivated breed over time”—wikipedia

  4. Historically • Charles Darwin • Origin of Species—1859 • Journey of the Beagle • Finches with different attributes on the Galapagos islands

  5. What do you do? • Picking out desirable qualities to pass on to offspring • Breed the appropriate male and female species together to produce that offspring • Rebreed as many times as necessary to get the desire traits

  6. Techniques • Inbreeding: breeding between close relatives • Can lock in desirable traits to a population • Linebreeding: like inbreeding, but farther away relatives (i.e. cousins) • Can lock in desirable traits without causing damage to population • Outcrossing: introducing new traits • Introduce desirable traits

  7. Why? • Show dogs • Cattle • Horse racing

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