Effect of treatment of cherry grafts following gamma radiation on mutation frequency

arbre breeding breeding methods cereza cerise cherries crops cultivos economic plants fruit crops frutales frutas de clima templado gamma radiation graft unions grafting greffage induced mutation injerto methode methods multiplication des plantes ornamental plants ornamental trees physical states plant propagation plantas plantas ornamentales plante plante de culture plante ornementale plants point de greffe radiation rayonnement gamma temperate fruits trees vegetative propagation