红花木、长红木染色体核型的研究

摘要

首次报道红花木(Loropetalum chinense var. rubrum)、长红木(Loropetalum chinense var. semper rubrum)的染色体数目及其核型分析。两者体细胞染色体数目均为2n=24。按Levan和我国植物染色体的分类标准，红花木的核型公式为：2n=2x=24=14m+8Sm+2St；长红木的核型公式为：2n=2x=24=12m+10Sm+2St。根据Stebbins划分的核型对称性的标准，两者都属“2A”型。%The chromosome number and karyotype analysis of two plants namely, Loropetalum chinense var. rubrum and Loropetalum chinense var. semper rubrum, are reported for the first time. The two plants' chromosome numbers are the same, 2n=24. According to the classification criteria on both Levan and the plant chromosome in China, the two plants’ karyotype formula are as follows： for Loropetalum chinense var. rubrum, 2n=2x=24=14m+8Sm+2St and for Loropetalum chinense var. semper rubrum, 2n=2x=24=12m+10S+2St. Based on stebbins classification criterion of karyotype symmetry, the two plants belong to “2A” karyotype.