| 摘要: |
| 采用压片法对中国姜花属十八个分类群进行了体细胞染色体计数,对白姜花减数分裂终变期I的染色体数目和形态进行了观察。结果显示:包括白姜花在内的十九个分类群中有六个二倍体,一个三倍体,十二个四倍体,其中十二个分类群的体染色体数目为首次报道,显示中国姜花属植物具有较高比例的多倍体类型; 姜花属的染色体基数为n=17,染色体组可能是多倍体起源的。 |
| 关键词: |
| DOI：10.3969/j.issn.1000-3142.2011.03.007 |
| 分类号:Q942 |
| Fund project: |
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| Cytological studies on the 19 taxa of Hedychium in China |
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HU Xiu1, WU Fu-Chuan2, LIU Nian1*
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1.Zhongkai University of Agriculture and Engineering, Guangzhou 520225, China;2.Xishuangbanna
Tropical Botanical Garden, Chinese Academy of Sciences, Mengla 666303, China
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| Abstract: |
| The somatic chromosome numbers of 18 taxa in Hedychium and the numbers and morphology of diakinesis I of H.coronarium were observed by crash method. The results show that:among the 19 taxa studied,there are six diploid(2n=2x=34),one triploid(2n=3x=51),and twelve tetraploid(2n=4x=68),thus indicating the high percentage of polyploidy of Hedychium in China. The chromosome numbers of twelve taxa were reported for the first time; the genome number of Hedychium is 17 and it is probably of polyploidy origin. |
| Key words: Hedychium chromosome count genome number polyploid |
