引言鸭梨是我国梨的最著名品种,素以品质优良驰名国内外,为我国大宗出口果品。但是近些年来,国内外反映鸭梨品质有下降的趋势,其主要表现是:梨果的风味变淡,贮藏过程中易发生“黑心病”,此外,还有鸭梨果形发生变异的问题,即许多鸭梨果实丧失本品种基本的果形特征,出现“鸭梨不像鸭梨”的现象,因而影响这一名 Introduction Yali pear is the most famous variety of pear in our country, and is famous for its good quality both at home and abroad. It is the bulk export fruit of our country. However, in recent years, domestic and foreign pear quality reflects a downward trend, the main performance is: pear fruit fades, prone to “black heart disease” during storage, in addition, pear pear shape variation , That is, many pear fruit loss of the basic fruit shape characteristics of this species, there “pear is not like pear” phenomenon, thus affecting the name