• 标题：Karyomorphological of three endemic plants (Brassicaceae: Euclidieae and Arabideae) from the Qinghai-Tibet Plateau and its significance
• 关键词：Karyotype,Endemic species,Anzhengxia,Shangrilaia,Baimashania,Qinghai-Tibet Plateau
• 作者：Wenguang Sun, Haixia Wang, Rui Wu, Hang Sun, Zhimin Li

In the paper, chromosome number and karyotype of three endemic genera from China are reported for the fifirst time. Our results show that Anzhengxia yechengnica has a karyotype formula 2n ¼ 2x ¼ 14 ¼ 6 m þ 8sm and belongs to Stebbins-3A; Shangrilaia nana karyotype formula is 2n ¼ 2x ¼ 14 ¼ 10 m þ 4sm (sat) and belongs to Stebbins-1A; Baimashania pulvinate karyotype formula is 2n ¼ 2x ¼ 16 ¼ 12 m (sat) þ 4sm and belongs to Stebbins-1A. Anzhengxia and Shangrilaia are monospecifific genera belonging to tribe Euclidieae and both have a basic chromosome x ¼ 7. Baimashania, which belongs to tribe Arabideae, has two species which have a basic chromosome x ¼ 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.

Copyright © 2020 Kunming Institute of Botany, Chinese Academy of Sciences. Publishing services by Elsevier B.V. on behalf of KeAi Communications Co., Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/