Hi Peeps, thank you again as always, for effort & time taken to help & answer questions
Firstly, I found the info in this thread we were discussing about pied & neck pattern, & it wasn't about solid neck patterned pied pearls as I had thought, but rather, pearl neck patterned birds & quote
"Do you have any regular Pearl Greys (that are not Pied) that have pearling on their necks rollyard? I don't, (and never did, that I know of)..." So, in saying this, you have associated or made link between the pearl neck pattern & pied breast pattern in Pearl Grey birds which is encouraging. This has been the trend here also as per my post above, ie, all pearl neck patterned birds bred here (not sure of exact number but there are quite a few, 60 young Pearls running around) had white on breast to some degree.
What I am now trying to determine is why none of the solid neck patterned Pearls don't have any white on breast? None of them do! I would have more pearl necks than solid necks, but not one of the solid necks have white on breast, while every pearl neck does have white on breast? I was sort of hoping that your answer would be that none of your solid necked Pearls had white on breast to support my findings I guess, but not to be. No matter because there is something I am missing, & we need to keep in mind that the gene (or one/more of them) that produce white in your birds may not be exactly the same as ours? But of course it may be also?
As for the white in flights! I have never really associated this with the factor which puts white on the breast. Why? Although genes can & do appear to express quite variably for specific traits, I have'nt made the link between white on breast & white in wings. If you continue to inbreed/linebreed two white winged birds together over some generations, you may well get more white (wherever), but this doesn't necessarily mean that the gene for two or three outer white primaries is responsible. Other minor/hidden factors in the birds may be increasing in frequency & becoming "exposed" so to speak. The birds still have the original factor for white because you have been selecting for it, but you have also been selecting for
more white so other factors have also come into play.
Additionally, if we compare with other species, @ least one I can think of (Mallard derivitives) reportedly have a specific recessive (autosomal) gene which when in pure form adds a few outer white primaries. Numbers of primaries can vary which may be explained by variable expression of
the gene I guess, or maybe something else, I don't know. But Mallard derivitives have other factors which put white in other places on the bird too! I would have to check but Jap Quail may be another example of white flights due to a specific factor, & probably others also. My original pair of Pearl Greys had white flights from memory, as do many of the solid neck straight pearls I have bred this season, but none have white on breast. As you have mentioned with your free range birds, although not specifically selected for, you continued to breed birds without white on breast, even though white in flights occured in them. Had you selected for more white over the years under more controlled conditions you possibly would have got it, but again, that doesn't mean that your birds had the same "major" factor which puts white on breast in many birds. I currently feel that white in flights is due to a "major" unrelated factor to that for white on breast, @ least in the birds I have here!
Just gone over page & seen your pic, thank you again so much for time taken Peeps. Yes, I can see the solid neck pattern on the two marked birds, the front @ least being pied (can't see bird behind, but I don't need to). So breast or underside white does occur on solid necked Pearls in your neck of the woods then
Only kidding, its not that bad, & just adds to my desire to solve the puzzle.
Perchie.girl, although I never commented on your post earlier, I did read & appreciate your input, thank you
New site looks good, but taking a little getting used to.