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以甘蓝型油菜小孢子来源的单倍体植株和种子来源的植株为材料,研究两者之间叶片气孔保卫细胞外围周长值（L）的差异,对两者的L值进行了统计分析。结果表明,单倍体植株与种子来源植株之间叶片气孔保卫细胞外围周长值（L）的差异显著,并且在两者第五片叶片中不同部位测得的L值比较稳定,可将L值作为鉴定甘蓝型油菜植株倍性水平的一个辅助指标。
The haploid plants and seed-derived plants derived from microspore-derived Brassica napus were used as materials to study the difference of peripheral perimeter (L) between stomatal guard cells and their L value. The results showed that there was a significant difference in perimeter perimeter (L) between stomatal guard cells of haploid plants and seed-derived plants, and the L values measured at different sites in the fifth leaf of the two plants were relatively stable. L Value as a secondary index to identify ploidy level in Brassica napus plants.