With Kinloch Brae for example, Max Moss(x Elsie Moss) is in x, if the brood carries Temlee in x within 8 gens then you've got linebreeding in x to a cornerstone brood in Elsie Moss as Temlee carries Max's brother Mister Moss also in x.

So even when you outcross it's the linebreeding in x that stands out.

I just put it out there Mark, up to you to decide. Remember you dont have to change how you think about breeding all that much, just include linebreeding in x to a cornerstone brood if possible.

Close relatives can share large segments of their genome identical by descent (IBD) that can be identified in genome-wide polymorphism data sets. There are a range of methods to use these IBD segments to identify relatives and estimate their relationship. These methods have focused on sharing on the autosomes, as they provide a rich source of information about genealogical relationships. We hope to learn additional information about recent ancestry through shared IBD segments on the X chromosome .

As I said before all I know is what is on that list, take it however you want.

BTW a genome is ALL of the chromosomes/genes of an animal, not just one (of 78 for a dog). On average a sire or dam will pass 50% of their genome onto their offspring.

The term x-factor has been around for many decades and has nothing to do with greyhounds or horses, specifically. It just means a dog (or a horse/human/racing duck) has something 'special' about him without the person knowing why. The first time I saw it mentioned in regards to greyhounds was in a Vic Greyhound Weekly article by Barbara Prior in the early '90's, who didn't know what it was and certainly didn't relate it to chromosomes.

There's little doubt this is why people are so enamoured by the X-chromosome instead of the whole genome of the dog, and that's understandable given no-one knows exactly which genes on which chromosomes are responsible for ability. All we know is that 'ability' is in there somewhere and it's extremely likely many genes are involved.

how do you know that Graham? 7 of the top ten offspring of Kinloch Brae say otherwise.

your original statement was your theory has nothing to do with genetics when that excerpt says it does.

what your saying now is all linebreeding is irrelevant as linebreeding is about relationships on either side of the pedigree, what then are you contributing to this topic?

Mark it's anything but another side to the story......I'm saying heres some evidence of x at work and Graham's saying no it's not with no evidence. How is that even an argument?

We can all find reasons for a dog becoming a champion after it gets to that level.

Tony when we were talking about linebreeding in x to Lemon Soda many yrs ago thru littermates Curryhill Brute/Curryhills Fox, pretty sure one of the reasons Steven bred the Gelantipy Gold litter was due to the mating giving up Lemon Soda in x......but chk that with him.

EXTERNAL LINK

So tell me, how does linebreeding in the X path work for a male greyhound? He doesn't receive an X from his sire. So all of those male greyhounds you base your theory on aren't linebred in the X path at all.

As I've said in the first post the male can't pass on 'x' from a male to a male, however what no can say is what effect 'x' (being 8x larger than say 'y') has on that whole litter, males included. The males just cant pass x onto another male.

Now, if a male can't pass on his X-chromosome to a male (son), how can it be of any value (to a male)? It's like saying that if I park my 100HP car next to a car with 200HP all of a sudden I have 300HP. It simply can't happen.