Karyomorphology of Podocarpus s.l. in China and its systematic significance
Karyomorphology of Podocarpus s.l. in China and its systematic significance
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DOI：
10.1080/00087114.2001.10589219
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发表时间：
2001-04
期刊：
影响因子：
2.1
通讯作者：
Q. Zhou;Zhanjun Gu
中科院分区：
文献类型：
--
作者：
Q. Zhou;Zhanjun Gu
本文对罗布麻属(Podocalpus s.1)3组7种植物进行了核形态研究。来自云南省的中国。所有物种的有丝分裂前期染色体都具有相同的间质型，但休眠核型不同。静止核为Sect的梯度型。Dacrycarpus，为Sect.的简单染色中心型。Nageia和复染色心型为Sect.分别为罗汉果属和罗汉果属。其核型公式分别为2n=20=16M+4SM、2n=26=9M+17SM、2n=26=17M+9SM、2n=26=13M+13SM、2n=38=19M+3SM+2ST+8T、2n=38=18M+10sM+2SM+8T、2n=38=20M+10SM+8T。罗汉果属3个组的形态特征，特别是静息核和基本染色体数目，与其他资料相结合，证明了它们在该科中的属地位。
Investigated in the present paper is the karyomorphology of 7 species in 3 sections of Podocalpus s.1. from Yunnan province of China. All species commonly showed the mitotic prophase chromosomes of the same interstitial type, but different resting nuclei type. The resting nuclei were found the gradient type for Sect. Dacrycarpus, the simple chromocenter type for Sect. Nageia and the complex chromocenter type for Sect. Podocarpus respectively. The karyotype formulae were 2n=20=16M+4SM for Podocarpus imbricatus, 2n=26=9M+17SM for P. nagi, 2n=26=17M+9SM for P. wallichiana, 2n=26=13M+13SM for P. fleuryi, 2n=38=19M+3SM+2ST+8T for P. macrophyllus var, angustifolius, 2n=38=18M+10SM+2SM+8T for P. forestii, and 2n=38=20M+10SM+8T for P. neriifolius respectively. The karmorphology of 3 sections in Podocarpus, especially the resting nuclei and basic chromosome number, together with the other data, justified their generic status in the family.