Sun Wenguang, Wang Haixia, Wu Rui, Sun Hang, Li Zhimin
CAS Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China.
School of Life Science, Engineering Research Center of Sustainable Development and Utilization of Biomass Energy, Yunnan Normal University, Kunming 650500, China.
Plant Divers. 2020 Mar 19;42(3):135-141. doi: 10.1016/j.pld.2020.03.002. eCollection 2020 Jun.
In the paper, chromosome number and karyotype of three endemic genera from China are reported for the first time. Our results show that has a karyotype formula 2n = 2x = 14 = 6 m + 8sm and belongs to Stebbins-3A; karyotype formula is 2n = 2x = 14 = 10 m + 4sm (2sat) and belongs to Stebbins-1A; karyotype formula is 2n = 2x = 16 = 12 m (2sat) + 4sm and belongs to Stebbins-1A. and are monospecific genera belonging to tribe Euclidieae and both have a basic chromosome x = 7. , which belongs to tribe Arabideae, has two species which have a basic chromosome x = 8. The implications of these cytological data are compared with morphological support and the implications for each tribe are discussed. We also summarize chromosomal number variation and its systematic implications of two tribes from the Qinghai-Tibet Plateau.
本文首次报道了中国三个特有属的染色体数目和核型。我们的结果表明，[属名1]的核型公式为2n = 2x = 14 = 6m + 8sm，属于Stebbins-3A；[属名2]的核型公式为2n = 2x = 14 = 10m + 4sm(2sat)，属于Stebbins-1A；[属名3]的核型公式为2n = 2x = 16 = 12m(2sat)+ 4sm，属于Stebbins-1A。[属名1]和[属名2]是单种属，属于欧几里得族，二者的基本染色体数x = 7。[属名3]属于南芥族，有两个物种，其基本染色体数x = 8。将这些细胞学数据的意义与形态学证据进行了比较，并讨论了对每个族的意义。我们还总结了青藏高原两个族的染色体数目变异及其系统学意义。
