中国喜马拉雅地区特有植物黄花木属的细胞学研究

doi:10.3724/SP.J.1143.2011.10178

Plant Diversity ›› 2011, Vol. 33 ›› Issue (2): 164-170.DOI: 10.3724/SP.J.1143.2011.10178

中国喜马拉雅地区特有植物黄花木属的细胞学研究

陆覃昱，王兴江，张永增，李志敏

云南师范大学生命科学学院，云南昆明 650092

收稿日期:2010-10-19 出版日期:2011-04-25 发布日期:2011-02-15
基金资助:
国家自然科学基金项目(40930209, 30770167),云南省重点项目 (2008CC013),科技部基础平台专项重点项目(2007FY110100)。云南省教育厅省级精品课程项目

A Karyological Study of Piptanthus (Leguminosae) from Sino-Himalayas

LIU Qin-Yu, WANG Xin-Jiang, ZHANG Yong-Zeng, LI Zhi-Min

Life Science School, Yunnan Normal University, Kunming 650092, China

Received:2010-10-19 Online:2011-04-25 Published:2011-02-15

摘要/Abstract

摘要：

对中国喜马拉雅特有类群黄花木属（Piptanthus）的黄花木(P.nepalensis)和绒叶黄花木(P.tomentosus)的5个居群进行了核形态学研究。黄花木属染色体基数x=9，染色体数目2n=18，均为二倍体；该属种间核型存在显著差异，即黄花木居群属于1A型，绒叶黄花木属于2A型；另外，黄花木种内居群间核型公式也表现出一定的差异。该研究结果从细胞学印证和支持了前人系统学和生物地理学的推论，即绒叶黄花木(2A核型)是由黄花木或祖先(1A核型)在喜马拉雅隆升过程中由西向东扩张分化形成的。

关键词: 黄花木属, 居群, 核型, 进化

Abstract:

The karyology of 5 populations, all two species of Piptanthus (P.nepalensis and P.tomentosus) from Sino-Himalayas were studied in this paper, of which chromosome number and the karyotype of P.tomentosus was firstly reported. The results show that both species P.nepalensis and P.tomentosus share the same chromosome basic number x=9 and 2n=18, all of them are diploids. Statistical analyses show that there are evidently differences of karyotypes between the two species, that is, P.nepalensis belong to the 1A type, and P.tomentosus is the 2A type. In addition, there are some differences in karyotype among populations in P.nepalensis as well. These results are consistent with the anterior hypothesis by systematic and biogeography that P.tomentosus (with 2A) was resulted from the expansion and differentiation of P.nepalensis (with 1A ) from west to east during the himalaya uplift.

Key words: Piptanthus, Population, Karyotype, Evolution

中图分类号:

Q 943

陆覃昱, 王兴江, 张永增, 李志敏. 中国喜马拉雅地区特有植物黄花木属的细胞学研究[J]. Plant Diversity, 2011, 33(2): 164-170.

LIU Qin-Yu, WANG Xin-Jiang, ZHANG Yong-Zeng, LI Zhi-Min. A Karyological Study of Piptanthus (Leguminosae) from Sino-Himalayas[J]. Plant Diversity, 2011, 33(2): 164-170.

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中国喜马拉雅地区特有植物黄花木属的细胞学研究

A Karyological Study of Piptanthus (Leguminosae) from Sino-Himalayas

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