摘要:
[目的]研究白花除虫菊四倍体株系与二倍体对照株系花粉的形态特征及其育性和种子发芽率.[方法]采用硫酸-醋酸酐分解法制备花粉,用普通光学显微镜观察并测量花粉的极轴和赤道轴长度,用扫描电镜观察花粉粒形态,并选取有代表性的视野2500 ×(或2 000×)、7 000 ×进行拍摄.[结果]四倍体株系与二倍体对照株系比较,供试的5个四倍体株系花粉粒样品中有4个样品的极轴与赤道轴的长度均显著大于对照二倍体,只有1个样品与对照相近.5个多倍体侏系的花粉粒在形态,表面雕纹等方面均与二倍体对照有差异.[结论]为选育出育性良好、种子发芽率高的白花除虫菊优良四倍体品种提供参考依据.
Abstract：
[Objective] The aim was to study characters of pollen grains of tetraploid lines and diploid control line of Chrysanthemum cinerariifolium (Trav.) Vis.,morphological characters,fertility of pollen grain and germination percentage of seeds.[Method]Pollen grains were prepared by sulphuric acid-acetyl oxide decomposition method.The lengths of polar axis and equatorial axis of pollen grains were determined with general optical microscope.The morphology of pollen grains was observed with SEM (scanning electron microscope) and the typical visual fields of 2500 x (or 2 000 x),7 000 x were taken pictures. [Result] Comparing with the diploid control line,the pollen grains of five tetraploid lines which were tested were different from the diploid line in morphology,sculpture,etc..4 of the 5 tested samples were significant larger than the ties of Chrysanthemum cinerariifolium (Trev.) Vis.with good fertility and high germination percentage.
