Karyomorphology and relationships of Amentotaxus Pilg.

›› 2000, Vol. 38 ›› Issue (6): 522-527.

ZHOU Qi-Xing, GU Zhi-Jian, YUE Zhong-Shu

Abstract:

In this paper, two species in Amentotaxus Pilg. from the mainland of China , A. ar-

gotaenia and A. yunnanensis, were karyomorphologically studied. They commonly showed the inter-

phase nuclei of the complex chromocenter type and the mitotic prophase chromosomes of the intersti-

tial type. Their karyotypes were formulated as K(2n) = 36 = 8m + 28T, both belonging to Stebbins'

1B type and with the N. F. value ( number of fundamental) being 44. The chromosome number and

karyotype of A. yunnanensis were reported here for the first time. Karyomorphological features of

Amentotaxus, especially the N. F. value, together with other evidence, have indicated its close re-

lationship with Torreya within the Taxaceae.

Key words: Amentotaxus Pilg., Karyomorphology, Systematic position

ZHOU Qi-Xing, GU Zhi-Jian, YUE Zhong-Shu. Karyomorphology and relationships of Amentotaxus Pilg.[J]. , 2000, 38(6): 522-527.

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