A question for those who may know more about it:

“I’m looking for info on back-crossing of shrubby. exactly, I need the description of the F2A and F2B of Saunders, used by Daphnis for its first back-crossing of lutea hyb. the saunders numbers were  12788  and 16718.” It was asked by @benedictedefoucaud and although I’ve heard of these, I don’t know nor remember much about them.

Koen