Dedicated to the complex problem of breeding healthy dogs.
For every complex problem there is an answer that is clear, simple, and wrong.
H. L. Mencken

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shared:populationgeneticspractice [2009/05/09 22:07]
J. Jeffrey Bragg 		shared:populationgeneticspractice [2009/05/10 11:57] (current)
J. Jeffrey Bragg Rewrite of first para
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Copyright ©2009 J. Jeffrey Bragg Copyright ©2009 J. Jeffrey Bragg
-Although the scientific discipline of population genetics has existed for the better part of a century, its penetration into the world of the dog breeder is only just beginning, despite its importance and relevance to that world. Often I have heard dog breeders wish for an understandable guide to practical dog breeding, drawn from the principles of population genetics -- a set of guidelines for dog breeders that would show the way to a healthier way of breeding than the harmful methods of inbreeding and selection now practised by the vast majority. At the present time, after twelve or fifteen years of existence of the canine diversity movement, most of the accessible discussions of dog breeding as a discipline still recommend linebreeding (a euphemism for inbreeding), breeding only “the best to the best,” together with stringent artificial selection and multiple screening for genetic diseases. That is still the old way. Those are the methods that brought genetic crisis to the world of  purebred dogs in the first instance.+Although the scientific discipline of population genetics has existed for the better part of a century, its penetration into the world of the dog breeder is only just beginning, despite its importance and relevance to that world. Often I have heard dog breeders wish for an understandable guide to practical dog breeding, drawn from the principles of population genetics -- a set of guidelines for dog breeders that would show the way to a healthier way of breeding than the harmful methods of inbreeding and selection now practised by the vast majority. As things stand with traditional dog breeding, the competitive struggle for individual excellence has harmful consequences for breed populations. What is needed is for breeders to think in population terms, to look at each breed genetically as a population and each breeder involved with that particular population as a conservator of that breed in partnership with others.   
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 +At the present time, after twelve or fifteen years of existence of the canine diversity movement, most of the accessible discussions of dog breeding as a discipline still recommend linebreeding (a euphemism for inbreeding), breeding only “the best to the best,” together with stringent artificial selection and multiple screening for genetic diseases. That is still the old way. Those are the methods that brought genetic crisis to the world of  purebred dogs in the first instance.
Two and a half years ago on the Canine Genetics email list, I asked  whether we could not collaborate to write down a set of rules, guidelines or principles aimed at breeding according to the principle "primum non nocere" -- "above all, do no harm!" Although a few people acknowledged the desirability of such a document, we never managed to mount a thorough discussion of which principles should be included. In the end I drew up my own provisional list of principles for 21st-century dog breeding, which I never published as I never was able to put it into a final form that I thought adequate. Two and a half years ago on the Canine Genetics email list, I asked  whether we could not collaborate to write down a set of rules, guidelines or principles aimed at breeding according to the principle "primum non nocere" -- "above all, do no harm!" Although a few people acknowledged the desirability of such a document, we never managed to mount a thorough discussion of which principles should be included. In the end I drew up my own provisional list of principles for 21st-century dog breeding, which I never published as I never was able to put it into a final form that I thought adequate.

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