| 豹子花属及其近缘属细胞学研究 |
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| 引用本文： | 谢晓阳,顾志健,武全安.豹子花属及其近缘属细胞学研究[J].中国科学院研究生院学报,1992,30(6):487-497. |
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| 作者姓名： | 谢晓阳 顾志健 武全安 |
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| 摘 要： | 本文以云南西北部怒江峡谷的豹子花属及其近缘的百合属、大百合属和贝母属的12个分类群为
材料，分析比较了这几个属的核形态特征。 12个分类群的体细胞静止期染色体形态相似，均属于复杂染色中心微粒型；有丝分裂前期染色体形态也相似，都属于中间型；染色体数目均为2n=24；染色体着丝点端化值在79.9-82.2％之间；核型不对称程度一致；故这4个属的关系密切。对本地区的12个分类群来说，核型变异主要在于次缢痕位置的差别。豹子花属和百合属在它们的一对m或sm染色体近着丝点处具有次缢痕，并且豹子花属和高海拔处的百合属植物(如L．souliei)在其st或t染色体的短臂上缺乏次缢痕，表明豹子花属同百合属特别是同高海拔处的百合属植物关系密切。
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| 关 键 词： | 百合科 豹子花属 百合属 川贝母 大百合 核型 |
Cytological Studies of the Genus Nomocharis and Its Related Genera |
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| Xie Xiao-Yang,Gu Zhi-Jian,Wu Quan-An.Cytological Studies of the Genus Nomocharis and Its Related Genera[J].Journal of the Graduate School of the Chinese Academy of Sciences,1992,30(6):487-497. |
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| Authors: | Xie Xiao-Yang Gu Zhi-Jian Wu Quan-An |
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| Abstract: | The somatic cells of 12 taxa of the genera Nomocharis, Lilium,
Fritillaria and Cardiocrinum from north-western Yunnan were karyomorphologically
studied. The 12 taxa are similar to each other in chromosomal morphology at
the resting nucleus stage, which belongs to the complex chromocenter type. They
are also similar to each other in morphology of mitotic prophase chromosomes,
which belongs to the interstitial type. Their chromosome numbers are all 2n = 24,
and centromeric terminalization values range from 79.9- 82.2%. The above
results show that the four genera have close relationships. These 12 taxa,
however, exhibit some similarities and differences in the position of secondary
constrictions seemingly showing the karyological characters of each genus in the
area. Firstly, on m(sm)-chromosomes, secondary constrictions close to
centromeres appear stable in one of pairs in both Nomocharis( 6 taxa) and
Lilium (4 taxa); In Cardiocrinum giganteum, they were found distant from
centromeres on short arms in one of pairs; None was observed in Fritillaria
cirrhosa. Secondly, on st (t)- chromosomes, remarkable secondary constrictions
were generally found on long arms in Nomocharis, C. giganteum, F. cirrhosa
and the high mountain habitants of Lilium, such as L. souliei, while they were
always observed on short arms in L. nepalense, L. taliense and L. brownii,
which grow in the lower altitude region. So the Nomocharis and high mountain
members of Lilium have similary distribution of secondary constrictions, and theyare considered to be most closely related. |
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| Keywords: | Liliaceae Nomocharis Lilium Cardiocrinum giganteum Fritillaria cirrhosa Karyotype |
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