AN SC110 Lecture : Breeding (part I)

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Breeder must be knowledgabke enough to spot strengths and weaknesses of breeding stock. Ie: don t breed a halter horse for ranch work. Capabilities must be able to do what you want. Breeders must breed with a plan for where to sell their horses. Grading-up upgrade breed your mare to a stallion better than her. Out-breeding same breed, but no common ancestor. In-breeding mate 2 individuals with common ancestory on both sides. Line-breeding in-breeding focusing on a single ancestor. Number of traits the more traits you select for, the less progress you can make in each. Size of herd more to chose frm. Starting level improve faster when you start lower. Culling rate - stricter culling rate = faster progress. Environment (location, nutrition, health care, hoof care, training, mare) vs. genetics (stallion, mare) A good environment is necessary to show full genetic potential. Genes on the same chromosome are linked genes . Homozygous the same allele on both chromosomes.

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