Yuor question was asked earlier in the forum when it started. I will say again, I cannot give out pedigree info that I am using in my research. It would be me publicly saying "such and such" stallion or "such and such " farm has produced a certain number of dwarfs and without scientific proof it could ruin a stallion or bloodline or farm just on heresay. I dont think people would appreciate it, especially if it was your stallion or breeding program.
In general, I will say like I said in the other answer, these dwarfisms are extremely intertwinded within the WHOLE breeding population. My dwarf samples have pedigrees and backgrounds of every well known pedigree in the world. It is not wise to get hung up on "bloodlines"; many carriers have extensive old bloodlines that are intertwinded, and the same is so for the non-carriers, you will not know which are carriers and which are not until you have a dwarf.
We are NEVER going to know the original culprits, so get over that thought, go from here and learn what actual horses have produced dwarfs.
John