Well...I guess in a round about way. They will be closer related if this works
The idea behind it is this. H.Jusbertii is an intergeneric hybrid and was prouced by crossing Harrissia Sp with a Echinopsis Sp (Eyriesii). Now due to the Harissia being the mother when Jusbertii flowers you need an echinopsis father to produce seed .
I'm just wondering, if Trochos are in essence classified an echinopsis then in theory it should work ?