Breeds and breeding

Breeds and breeding - Breeds and Breeding Objectives • Explain why breeds were developed and the importance of breeds now Breeds • Definition

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Unformatted text preview: Breeds and Breeding 10-13-10 Objectives • Explain why breeds were developed and the importance of breeds now. Breeds • Definition: Animals of common origin with characteristics that distinguish them from other groups within the species Requirements for a breed • ? Requirements • Sufficient numbers – Stably maintain differing qualities – Enough genetic variation to avoid severe inbreeding • Registry or herd book to maintain the integrity of the breed – Human construct, not biological Requirements • Breed true – Offspring have traits similar to parents – What happens with non purebreds? • Cross bred matings? Impossible to predict the offspring because there are 4 genetic backgrounds • Plant seed corn from a hybrid corn plant? Resulting plant is not like the parent stock>> little corn developement Why were breeds developed? • Group discussion • Dogs, cats, cattle, and sheep – Possible purposes for the various breeds? – Why? – How? Dogs • More species variation • Number of breeds – Highly variable – Kennel clubs – Up to 400 in the world American Kennel Club • Sporting – bird dogs • Hound group – hunt with site or scent...
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This note was uploaded on 01/09/2012 for the course ANSC 243 taught by Professor Black during the Fall '10 term at Maryland.

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Breeds and breeding - Breeds and Breeding Objectives • Explain why breeds were developed and the importance of breeds now Breeds • Definition

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