I was in charge of M. Royon greenhouses from late sixties to late seventies and as part of my employment contract I "discovered" all Sonia sports refered to as well as some from Carina.

Mr Royon as a life long developer of breeders' rights and as he was Meilland firma manager till the late sixties was probably responsible of most if not all of the original agreement. In this vein he promoted the idea that sports are "essentially derived" of the breeders var in order to justify breeders part ownership of sports discovered by others.

As you see things are not simple.
Much less as the facts related were occuring just at Royon departure from Meilland firma.