Table 1.

Rootstock/interstock model system

Treatment	Symbol	Rootstock	Interstock	No. of graft unions
1	▪	MM.106	–	1
2	•	MM.106	MM.106	2
3	▴	MM.106	M.9	2
4	□	M.9	–	1
5	○	M.9	M.9	2
6	▵	M.9	MM.106	2