在梨树密植集约化生产栽培中,欧美各国选用棍棒A、B、C做梨的矮化砧木,由于榅桲梨矮砧有不抗寒、固地性差、带病毒、不亲和等问题,生产上广泛应用受到一定限制。近年来,法、英、美、加、捷等国都提出从梨属中选择矮化砧木的育种目标, In intensive cultivation of pear planting cultivation, the United States and Europe choose sticks A, B, C as dwarfing rootstock pear, dwarf lotus root pear because there is no cold, poor solid, with viruses, incompatibility and other issues, Production is widely used by certain restrictions. In recent years, France, Britain, the United States, Canada, Czech Republic and other countries have proposed from dwarf genus dwarf rootstock breeding objectives,