野鸢尾染色体的核型分析及其分类地位探讨

Karyotype Analysis and Taxonomic Status of Iris dichotoma

通过对两种不同花色的野鸢尾进行核型分析,确定其染色体数目为2n=32,其中白色花的核型类型为2A型,紫色花为2B型,并明确了两者间不存在倍性的关系,推测白色花野鸢尾可能是紫色花野鸢尾的一个种内变异。通过分析野鸢尾与射干属植物射干以及与其同亚属植物中甸鸢尾的核型差异,从细胞学角度探讨了野鸢尾的分类地位。

The number of somaticchromosome in root tips of Iris dichotoma has been analyzed. Karyo types of Iris dichotoma （white）was： K（2n）=20m＋10sm＋2st; Karyo types of Iris dichotoma（purple）was： K（2n）=20m＋Ssm4-4st.The differences between lris dichotoma, Belamcanda chinensis and Iris subdichotoma were also studied .The goal of this study was to find more cytotaxonomy data about systematic status of Irls dlchotoma. And the genetic relationship between lris dichotoma （white） and Iris dichotoma（purpie） was also discussed.