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作者对牡丹的一个原始种及6个栽培品系进行了染色体的观察和组型分析,结果查明它们均为二倍体。这些品种与原始种间虽然在外部形态上及花型结构上有明显差异,但在染色体组型上表现差异甚微。5个栽培品种和1个原始种均由4对中部着丝点染色体及1对近端着丝点染色体组成,而另一栽培品种“青龙卧墨池”则由3对中部着丝点染色体,1对近中着丝点染色体及1对近端着丝点染色体组成。作者认为这些品种在核型上所表现的差异与花型结构上的差异并无相关性,与花型的演进也无关联。此外,还观察了体细胞染色体联合现象,联合百分率为28.7％。
The author of a primitive species of peony and six cultivars of chromosome observation and type analysis, the results were found to be diploid. Although there is a significant difference in morphology and flower structure between these species and the original species, there are very few differences in the performance of the genotypes. Five cultivars and one original species consisted of 4 pairs of middle centromeric chromosomes and 1 pair of proximal centromere chromosomes, while the other cultivar, “Qinglong lying pool” consisted of 3 pairs of central centromere chromosomes, 1 pairs of near centromeric chromosomes and 1 pairs of proximal centromeric chromosomes. The author believes that there is no correlation between the differences in the karyotypes of these cultivars and the differences in floral structure, nor is there any association with the evolution of floral patterns. In addition, somatic chromosome associations were also observed, with a combined percentage of 28.7%.