‘SJM44’ Apple Rootstock.
Citation
Khanizadeh, S., Groleau, Y., Levasseur, A., Carisse, O., Toussaint, V., Granger, R., and Rousselle, G.L. (2008). "‘SJM44’ Apple Rootstock.", HortScience, 43(3), pp. 947-948.
Abstract
‘SJM44’ (St-Jean Morden 44) is a new dwarfing rootstock resulting from a cross made in 1960 between Malus baccata ‘Nertchinsk’ and ‘M.9’ (‘Malling 9’, clonal selection of Paradis jaune de Metz). It was developed at the Agriculture and Agri-Food Canada Horticulture Research and Development Center, St-Jean-sur-Richelieu, Québec. It produces trees smaller than ‘Malling 26’ (‘M.26’) but larger than ‘Malling 9’ (‘M.9’). It was released because of its infrequent burr knots and freedom from root suckers compared with ‘M.9’ , superior hardiness, ease of propagation, and better yield efficiency.