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.
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.
出处
《北京林业大学学报》
EI
CAS
CSCD
北大核心
1999年第6期6-10,共5页
Journal of Beijing Forestry University
基金
"八五"国家科技攻关加强项目!( 85 1 8 0 1 0 9)
关键词
毛白杨
种间杂种
细胞遗传学
起源
Chinese white poplar, interspecific hybrid, cytogenetic, origin
