Study on Genetic Diversity of Turf Bamboo Based on ISSR Marker

[ Objective ] This study aimed to analyze the genetic diversity of turf bamboo species by using ISSR molecular marker technology. [ Method] Excellent turf bamboo species imported from France and domestic ornamental turf bamboo species were used as experimental materials for ISSR analysis, cluster analysis was conducted on 10 species of turf bamboo materials based on the obtained ISSR molectfiar ma^kers. [ Result] A total of 201 clear bands with good repeatability and high polymorphism were amplified with 21 ISSR primers, with a polymorphism rate of 93.1% ; similarity coefficients between different turf bamboo species ranged from 0.275 to 0.571, with an average similarity coefficient of 0. 357 ; according to the results of ISSR markers, 10 different ornamental turf bamboo species were di- vided into three categories by using UPGMA cluster analysis method. [Conclusion] Turf bamboo with different sources had relatively high genetic diversity, this study had provided theoretical and technical basis for the breeding, cultivation and vromotion of ornamental turf bamboo.

^(137)Cs γ射线辐照地被竹的生物学效应

用137Cs γ射线辐射6种地被竹的竹鞭或组培苗,进行辐射生物学效应的初步研究。结果表明:所选低剂量处理对幼芽萌动期没有影响,高剂量处理推迟幼芽萌动期。5、10Gy处理的竹笋破土期没有发生变化,20Gy处理只有翠竹的竹笋破土出苗。翠竹对辐射的耐受性较强,其组培苗致死剂量为20～30GY,对于菲白竹的组培苗,致死剂量不大于20GY;阔叶箬竹竹鞭的致死剂量在10～20Gy之间,其他3种地被竹的致死剂量均超过80Gy。翠竹、阔叶箬竹、美丽箬竹等辐射后形态没有明显变化,鹅毛竹在5、10Gy的剂量处理下叶片出现了花条纹。

基于ISSR标记的地被竹种的遗传多样性研究

[目的]利用ISSR分子标记技术对地被竹种的遗传多样性进行分析,旨在为地被观赏竹种的育种和栽培推广提供理论和技术基础。[方法]以从法国引进的优良地被竹种和国内部分观赏地被竹种为材料进行ISSR分析,并以获得的ISSR分子标记为依据对10种地被竹材料进行聚类分析。[结果]21条ISSR引物扩增得到条带清晰、重复性好、多态性高的条带201条,多态性比率93.1%;不同地被竹种之间的相似系数在0.275～0.571之间,平均相似系数为0.357;根据ISSR标记的结果,采用UPGMA聚类分析方法可将10个不同地被观赏竹种分为3个类群。[结论]该研究表明不同来源的地被竹有较高的遗传多样性,为地被竹种的育种和栽培推广提供了理论依据。