In a few threads recently there have been comments disregarding the importance of understanding blood lines. Comments such as “I don’t care about names on a piece of paper” or “my stallion is an X breed, why can’t he be accepting into certain WB breeding registries”. I was thinking how to respond to this with an educational purpose as I think this is a common thought for folks new to breeding. I know I certainly thought that way when I started and just got lucky with my choice:) I chose Rotspon 13 years ago, not because I understood the crossing of R and D lines, pedigrees, etc. but because he was stunning to me, and dare I say…black!
I am a small animal vet and see a LOT of puggles. They are a perfect example of why to understand the genetics behind the animal, and not just go on pheotype (ie; what they look like). When you mix a beagle and a pug to make a puggle you get pretty consistent results…a dog with a curled tail, always the color of a pug (black or tan), beagle ears, mid sized snout, moderately buggy eyes. However, you breed a puggle to a puggle and all sorts of things are going to come out! Beagles, pugs, almost beagle, almost pugs. The F1 generation is pretty darn consistent, the F2 generation not at all. IF someone wanted to develop a true puggle breed they would have to keep the F2 generation that had the “type” they wanted and cull the rest (in this fictional scenario hopefully that just means spay and neuter:)). Keep breeding the ones that had the “type” and over generations would develop a new “breed”.
Knowing generations of blood lines helps you determine and maintain that type…in the horse case I am talking about is the Modern Warmblood (be it Hanoverian, Oldenburg, Dutch. etc.). A breed that has been managed by type and athlete ability for the purpose of dressage, jumping, eventing and driving.
If you do not understand the genetics (ie; blood lines) you are working with your offspring can be that F2 generation of puggles described above. For example, breeding an Appendix to a WB could result in a QH offspring…EVEN if the Appendix parent in question is uphill, correct, etc. Now if the Appendix BREED is developed into a consistent type for generations you could begin to rely on the predictability of the offspring.
I do not make these comments to AT ALL make disparaging remarks to posters. I make them to try to explain how breeding and genetics really works. Why you should care about those names on a piece of paper and why breed registries are so restrictive. It is NOT to be exclusionary just for sake of it, but for the sheer purpose of developing and maintaining certain qualities as consistently as nature allows.