[buidelwolf]

Hello Yukidomari,

Very interesting post!

but some of the CW dogs I checked don't have compete pedigrees even in the 8th generation out

All Cvs have a complete pedigree at least to the base. I.e. up to the four wolves and the german shepherds they are crossed with; in some cases, even a limited number of ancestors of the founding German shepherds are included in the family tree. By measuring the COI on all generations I meant all the generations upon this base of the breeding. That is/was the way one could measure the COI on "all generations" with Wolfdog.org until recently.

If you measure the COI of old Cvs (or deceased) over 8 generations (or more), it can happen that you do indeed encounter a number of empty holes in the pedigree, but in any case it is complete upon the base of the breeding project, with exception of the "mixes".

I understand that Wolfdog is busy with adding the pedigrees of German Shepherds all the way to the base of the race; even to the dogs, Max von Stephanitz, the founder of the GSD, used (click here). This will give the measurement of the inbreeding coefficient on “all generations”, as specified above, another dimension of course, but from genetic point of view, it is very interesting.

I don't know if this is because Aussies have a larger foundation group (300), but if pedigrees for CW start to fray at around 8-9 generations back for some dogs, I think that an 8-10 generation COI is probably pretty accurate

Partly true, depending on which Cvs you measure. If you measure the inbreeding coefficient of an older Cvs, then yes, as 8-10 generations in this case usually means that you measure all generations (to the base of the Breeding). If you do that for a young Cvs (newborn Cvs) it could mean that one simply disregard most part of the strong inbreeding effect of especially Rep z Pohranièní stráze.

Although we owe our beautiful breed in particular to Rep z Pohranièní stráze, it is unfortunate that large inbreeding with him was committed in an early stage and the initial gene pool quickly narrowed drastically. Therefore all our dogs are very much related to each other by him, with not really opportunities to outcrossing anymore. I don't know the initial breeding situation of the Australian shepherd, but apparently the basis of it consists from about 300 different dogs and the breed was probably not inbred right from such an early stage.This could explain the fact that the outcome of the inbreeding coefficient of 10 generations is not much different from that of more than 10 generations. This makes an important difference with our race, where extensive inbreeding in the beginning was committed. In regard to measurement accuracy, I therefore plead for measuring COI on all generations, at least to the base (> Rep z Pohranièní stráze included), as it was possible until recently. I have every trust is that soon it will be possible again.

Regards