Two hundred and seventy - four sites were detected by 15 10 - mer primers , out of which 262 were polymorphic ( 95 . 6 % of the total loci detected ) . all of the materials were clearly distinguished , of which fourteen samples have forty - five typical rapd bands . before the molecular taxonomy was introduced , people never doubted subgenus yulania ' s disrelation with subgenus magnolia and a close relation between subgenus yulania and michelia , as there is in both genera a sameness seen in their prolepsis and powder chambers dehiscing on the side 3 、通过对玉兰亚属rapd扩增谱带的分析，发现该类群具有很高的多态性：多态位点百分率高达95 . 6 ，产生的多态性带数与所用引物数的比例为17 . 6 ， 15条随机引物清楚地分开了31个种类，其中的14个种共有45条特征性带，在利用rapd标记已研究过的类群中，本类群多态性较高。
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