【摘要】 本文主要是观察龙眼产区具有代表性的主要品种、野生种及泰国苗翘品种的花粉形态特征,通过观察说明不同品种间在花粉形态结构上都具有符合无患子科植物属、种形态特征的稳定遗传性状,但也有所变异。据此,能为应用花粉形态来揭示品种间的亲缘关系,并通过对11个龙眼品种花粉观察分析比较,论证了其从原始类型向进化类型演变趋势,同时讨论了临近品种的亲缘关系,绘制龙眼品种之间系统位置演变关系图。更多还原

【Abstract】 The morphological characteristics of pollen grains and the systemetic position of Dimocarpus longana Lour. including the important repre-sentative varieties growing at the productive zones in China and the varieties ’Miao Giao’ from Thailand are examined. The relationships of neighboring varieties are also explored.It is found that morphological structure of pollen grains coincides with the stable hereditary characters of morphological characteristics in the family sapindaceae genera and species, but the variances also exist. Therefore, the relationships between the different varieties are revealable.The examination and comparation of pollen grains in the eleven varieties of Dimocarpus longana Lour. demonstrates the tendency of the types of evolution ( from original to evolutive ) and the relationships of neighboring varieties. The figures of the evolutive relationships of systematic position of Dimocarpus longana Lour. are presented.更多还原