无性系品种，是指世代用无性繁殖方法繁衍的品种。由同一植株的营养器官用扦插、压条或组织培养法繁殖，不发生由于两性细胞结合而导致的基因重组所造成的性状分离，个体间性状相对一致，便于耕作管理和机采加工。
通过选择优良无性系，组建综合品种的途径有利于根蘖性状提高。
The way to set up synthetic variety by selecting good colone is of benefit to developing creeping rooted charcter.
采用31个银杏雌性品种和4个雄株类型的单株无性系，随机区组排列，对叶产量性状及其与叶产量的相关性，叶黄酮、内酯含量进行了研究。
The content of flavanone and lactone in leaf and the leaf output were studied by randomizing block arrangement of 31 gingko female varieties(strain) and 4 staminiferous plant type single clone.
对优良林草品种的选择和林草复合经营技术试验结果表明：引进的速生杨、速生柳各无性系间的扦插繁育和植苗造林成活率均不存在显著性差异；
Experimental results indicated that for the introduced fast-growing poplar and willow the cutting cultivating and the seedling planting of all clones had no significant difference in survival rate.
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