Therefore, the chromosome ploidy of plants derived from microspore culture in cabbage, broccoli and Chinese kale can be identified by simply counting the chloroplast number in stomatal guard cells.

• 甘蓝类蔬菜游离小孢子再生植株的染色体倍性，可于幼苗期根据气孔叶绿体数目的多少进行鉴定，而且此倍性鉴定方法简单、快捷、经济而又可靠。