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由于萍果种子有较长的休眠期,要想使种子发芽,一般均采用层积处理或药剂处理,方法麻烦。我们在进行萍果杂交育种、萍果根尖染色体鉴定的研究中发现:充分成熟的萍果果实,直接取出种子,剥掉内外种皮,使其胚和子叶裸露,浸在适当的水内,保持温度在22～28℃的条件下使其发芽。经4～7天就可以
As the seeds of apple have a longer dormant period, in order to make the seeds germinate, usually stratification treatment or pharmaceutical treatment, the method of trouble. In the study of apple-tree hybridization and apple root apical chromosome identification, we found that the full-ripe apple fruits are directly taken out of the seeds and stripped of the inner and outer seed husks so that their embryos and cotyledons are exposed and immersed in proper water, Keep the temperature at 22 ~ 28 ℃ under the conditions of its germination. After 4 to 7 days can be