黑龙江省抗寒李资源花粉形态的比较观察

对31个寒地李资源进行了电镜扫描，在测量极轴、赤道轴，条脊宽、穿孔径、穿孔频率后，分析出31个李品种花粉粒大小属于小至中等，31个李品种大多为长球形（比值2～1.14），个别品种牛心李、长李17号、吉林六号为超长球形（比值>2）, 均有3条沿极轴走向的等间距的发芽沟，发芽沟的有开张、半开张、不开张3种。31个李品种的外壁纹饰可以分为七种类型，大多数李品种的纹饰是条脊平行或分枝多穿孔纹饰，云状纹饰品种少为矮甜李、龙园秋李，脑纹状纹饰只有延吉李。根据极轴、赤道轴、条脊宽、穿孔径、穿孔频率5项指标，采用最远距离法对31个李品种进行聚类分析，牛心李与其它30个李品种亲缘较远。

Observation on the Pollen Morphology of Cold-Resistant Plum Resources in Heilongjiang Provinve

Pollen morphology of 31 plum resources from cold areas was observed by SEM, and the index of the polar axis, the equatorial axis, the crestiform axis, the perforation axis and the perforation frequency were also measured. The analysis shows that the pollen size of 31 plum species belong to small to middle type. The sharp of most of the plum species is protate (rate=2~1.14) and the sharp of nuixin plum, long plum 17 and jilin plum 6 is preprotate (rate>2). All of them have 3 pullulation channels with the same distance and the same direction with the polar axis. The exine sculpture of 31 types is open, half open and unopen. The exine sculpture of 31 plum resources have 7 types, most of the plum species belong to crestiform sculpture and branch multpullulation sculpture, short sweet plum and longyuan honey plum are cloudy sculpture, yanji plum is brain veins sculpture. Based on the index of the polar axis, the equatorial axis, the crestiform axis, the perforation axis and the perforation frequency, using the droppings cluster analysis, nuixin plum has far distance relationship with other species.