In case anyone here isn’t already well aware, Chip is WAY out of my league with the ddr z ps stuff, so I’ll preface in hopes everybody understands just who it is they’re talking to now. I come from a long line of byb. I’m talkin’ barefooted, bare chested, old overalls wearin’, old hank listenin’, old redman plug spittin’
OLD TIME byb. And even I find it disconcerting that all modern gsd go back to the same couple/few bottlenecks anymore. But like it or not, those bottlenecks are all that define the modern gsd.
Once you get good at reading gsd peds, you can learn a lot by studying other breeds. For example, spend some time studying high performance bsd peds and you’ll find some real linebreeding. The fact that gsd are no longer linebred the way high performance bsd are linebred may suggest the modern gsd has become “overbred.” The 2019 sv bszs video below may support that hypothesis as well?
To my eye it couldn’t be more readily apparent those dogs
may only be intended for use as seedstock, engineered to crossbreed x bsd dsd etc. Conformation snobs who espouse the virtues of breed purity in this day and age only unwittingly foot the bill for
the real breeding programs.
Y chromosome = nuclear dna. When I study a ped, I look for repeats in the Y slots. AKA “linebreeding.”
mtdna = x chromosome (mitochondrial dna). Here I look for biological diversity. The more numerous unique mtdna ancestors the ped contains, the more biologically diverse the ped is.
if you sit down with a handful of peds and plan just a few generations out, you’ll see for yourself how quickly the stuff in the middle just gets lost forever (ancestor loss coefficient, AVK).
the goal of the old time byb is to “target” the Y chromosome (nuclear dna), yet build the entire pedigree on some (hopefully) unique ancestor x chromosome (mtdna). I deliberately inbreed nuclear (Y)
AND deliberately outbreed mitochondrial (X) at the same time, in an attempt to effectively
manage inbreeding depression.
be forewarned: when done properly the above illustrated old time byb formula
WILL require some old time byb culling. The earlier, the better. Even on christmas day. If you have to ask, you don’t want to know. Need I say this is not a recipe to turn a profit selling puppies to pet homes? Any attempt to do so will only cost you very dearly.
we’re strictly on the hunt for day 51
vpat aces here, and that requires proper weaning. Failure to wean properly puts even the best individual at a very serious disadvantage.
*note: when calculating inbreeding/ancestor loss coefficients, always leave a blank slot behind every name in the ped, regardless of how many generations you’re calculating. Failure to do so will skew your results.