Hi Rick,
I edited my post because I am not sure we can even call your S1 a donor parent. But yeah, more importance should be placed on the selection of the recurrent parent in backcrossing programs. There is no work done on a donor parent, it it used once to pollinate the recurrent parent and that's it.
Clones are not genetic markers.
I also feel you are assuming many traits are complexly inherited when they may not be, and there is much talk in this thread that seems wild speculation to me. And my head hurts now so I'll retire from this for a while.
Back to square one, self the damn plant and see what happens.
il self it this week,,,no more chit chat now
i didnt relize you thought it was so wild