Ann Seranne states in pg. 63 - "It should not be necessary to point out that, unless the dog to which one linebreeds is truly an outstanding example of its breed, both physically and genetically, the breeder may be downgrading his stock rather than upgrading it. Linebreeding to a poor specimen can do nothing but produce poor quality puppies, and the more often the breeder returns to that poor specimen, the worse his puppies will become."
" Keeping in mind that a puppy receives approximately 50% of its inheritance from each parent, 25% from each grandparent, 12.5 % from each great grandparent, and so on, we can readily calculate the percentage of genes that a puppy shares with the ancestor to which its dam or sire was linebred."
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