Yeah, I would think Julie would impart a similar dwarfing effect on specific varieties. It would be interesting if there is an interstock that could decrease internode length and increase production. I wonder how Carrie would work out as an interstock?
This article shows how complex the interactions are between interstocks and scions, affecting specific cultivars but not others.
It makes me wonder if there are specific interstocks or rootstocks that can impart disease resistance to the scion.
Simon