| 毛白杨起源的细胞遗传学研究 |
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| 引用本文： | 康向阳,朱之悌,张志毅.毛白杨起源的细胞遗传学研究[J].北京林业大学学报,1999,21(6):6-10. |
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| 作者姓名： | 康向阳 朱之悌 张志毅 |
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| 作者单位： | 北京林业大学森林资源与环境学院,100083,北京 |
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| 摘 要： | 对毛白杨(PopulustomentosaCarr.)花粉母细胞减数分裂观察发现,其同源染色体联会较差,在终变期、中期Ⅰ可见到出现频率较高的单价体,在后期Ⅰ、末期Ⅰ亦可经常见到落后染色体的存在,证明部分同源染色体间存在一定程度的异质性,即毛白杨属杂种起源.进一步依据毛白杨、新疆杨和它们的杂种毛新杨染色体的联会情况及花粉育性等推断,银白杨或新疆杨有可能作为起源亲本之一参与了毛白杨种的形成.
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| 关 键 词： | 毛白杨 种间杂种 细胞遗传学 起源 |
Cytogenetic Studies on the Origin of Chinese White Poplar |
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| Kang Xiangyang,Zhu Zhiti,Zhang Zhiyi.Cytogenetic Studies on the Origin of Chinese White Poplar[J].Journal of Beijing Forestry University,1999,21(6):6-10. |
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| Authors: | Kang Xiangyang Zhu Zhiti Zhang Zhiyi |
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| Abstract: | Meiosis of pollen mother cell in Chinese white poplar(\%Populus tomentosa\% Carr.) is reported in this paper.There was a higher percentage of univalents at diakinesis and metaphaseⅠ, and lagging chromosomes at anaphaseⅠ and telophaseⅠ were frequently observed. This shows that there existed a certain degree of heterogenicity among the partial homologous chromosomes of Chinese white poplar, indicating that Chinese white poplar may be of a hybrid origin. Furthermore, on the basis of the chromosomal behaviors in meiosis and pollen fertility of Chinese white poplar, of \%P. bolleana\% and of their interspecific hybrid, it can be concluded that \%P. alba\% or \%P. bolleana\% are probably involved in the origin of Chinese white poplar. |
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| Keywords: | Chinese white poplar interspecific hybrid cytogenetic origin |
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