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应用ＢＳＧ方法对滇牡丹（Ｐａｅｏｎｉａｄｅｌａｖａｙｉ）复合群５个类群的ＧｉｅｍｓａＣ－带进行了比较研究。在５个类群的根尖体细胞有丝分裂中期观察到１０条染色体，其核型基本一致，均为Ｋ＝２ｎ＝１０＝６ｍ＋２ｓｍ＋２ｓｔ。各类群的１０条染色体都在着丝点附近显示出了ＧｉｅｍｓａＣ－带，所有染色体的长臂上都没有显示出ＧｉｅｍｓａＣ－带，而短臂上的ＧｉｅｍｓａＣ－带的数量和位置在类群之间表现了一定的差异。除了滇牡丹第一对同源染色体中只有一条的短臂上显示出了ＧｉｅｍｓａＣ－带而表现出了异染色质的杂合性外，其余各类群每一对同源染色体都显示了相同的ＧｉｅｍｓａＣ－带。每一类群所含的Ｃ—带比率（Ｃ—带总长度／染色体总长度）非常接近，约为１０％。文中还对其形态性状进行了分析。作者认为滇牡丹复合群５个类群的关系非常密切，可能是由同一祖先演化而来的。
The Giemsa C-banding of 5 groups of Paeoniadelavayi complex was studied by BSG method. Ten chromosomes were observed in the mitochondrial metaphase of the apical mitochondrion of the five groups, and their karyotypes were basically the same, all of which were K = 2n = 10 = 6m + 2sm + 2st. The 10 chromosomes in each group showed Giemsa C-band near the centromere, Giemsa C-band was not seen on all the long arms of the chromosome, and the number and position of Giemsa C-band on the short arm were between the groups Showed some differences. Except that Giemsa C-band was shown on only one of the first paired homologous chromosomes of D. grandis, but heterozygous heterozygous heterozygotes showed the same GiemsaC-belt. The C-band ratio (total C-band length / total chromosome length) contained in each group is very close, at about 10%. The article also analyzes the morphological traits. The author believes that there are very close relationships among the five taxa in the Yunnan Peony complex and may have evolved from the same ancestor.