梨砧木Ｍ５１具有矮化特性，适于密植栽培，有缩短梨树幼龄期提早结实，提高产量，便于管理和采收等优点。但传统繁殖方法，如扦插，压条等生根率低，繁殖速度慢。近年来，组织培养技术在果树快速繁殖，培养无病毒苗木等方面应用广泛。甘肃省农科院，四川农学院曾报道过普通梨 Pear rootstock M51 has dwarfing characteristics and is suitable for close planting. It has the advantages of shortening the early fruiting and early growth of pear trees in their early stages, improving yield, facilitating management and harvesting. However, the traditional breeding methods, such as cutting, lamination and other rooting rate is low, reproductive slow. In recent years, tissue culture technology is widely used in the rapid propagation of fruit trees and the cultivation of virus-free seedlings. Gansu Academy of Agricultural Sciences, Sichuan Agricultural College has reported ordinary pear