锯缘摄龟和齿缘摄龟的核型与Ag-NORs

The Karyotypes and Ag-NORs of Pyxidea mouhtii and Cyclemys dentata from China

本文分析了锯缘摄龟和齿缘摄龟的核型与Ag－NORs，结果：2n均为52,核型模式9＋5＋12.但锯缘摄龟AN＝78，其NOR位于A组No．4的长臂上，而齿缘摄龟AN＝76，NOR位于A组的No．7的长臂。作者对这两种摄龟核型的结构特点和NOR位置差异的细胞分类学意义进行了讨论。

In this paper, the karyotypes and Ag-NORs of Pyxidea mouhtii and Cyclemys dentata from China were studies. It was found that the 2n = 52, the karyotypic formula is 9+5+12 in this two species. But P. mouhtii has AN=78, its NORs located on the No.4 q of group A, while AN =76, NORs located on No.7 q of group A in C. dentata. The cytotaxonomical value of the features of karyotypic structure and the positinal differentiation of NORs between this two spepies is preliminarily discussed.