多倍性现象是高等植物新物种形成的主要方法之一。发现和培育优良的多倍体新品种,也是果树品种改良的有效途径之一。据有关资料报道,在葡萄、苹果、西洋梨、洋李、西瓜等树种中均已有多倍体品种存在。但这方面的研究资料尚少,多倍体品种也为数不多,尤其中国梨各系统中,尚未见报道。 Polyploidy is one of the main methods for the formation of new species of higher plants. Discovering and cultivating good polyploid varieties is also one of the effective ways to improve the varieties of fruit trees. According to the information reported, in the grapes, apples, pears, plums, watermelon and other tree species have polyploid varieties exist. However, there are still few research materials in this area and few polyploid varieties, especially in Chinese pear systems.