狼尾草野生种质资源的评价与分析

为加强野生狼尾草种质资源的研究与利用,以65份狼尾草种质资源为试验材料,对狼尾草7个主要性状进行评价与分析。结果表明:供试种质资源中花序数变异系数最大,其次依次为冠幅叶长抽穗后株高花序长抽穗前株高叶宽;根据种质资源间各性状的遗传差异,通过聚类分析将65份种质资源划分为3类,并从类群Ⅱ和类群Ⅲ中选出8个优选株系。优选株系主要性状表现株型紧凑,单株花序多等特点,抗逆性综合评价为优,在观赏狼尾草育种中具有重要利用价值。

Evaluation and Analysis on Wild Germplasm Resources of Pennisetum alopecuroides

In order to strengthen the utilization and studies on Pennisetum alopecuroides germplasm resources, this paper took 65 Pennisetum alopecuroides germplasm resources as material, assessed and analyzed their 7 major traits. The results showed that the number of inflorescence was significantly different among test germplasm resources. The effect was in the order of crown width＞leaf length＞plant height after heading＞inflorescence length＞plant height before heading＞leaf width. According to the genetic differences of each traits, the 65 germplasm resources could be devided into 3 categories by cluster analysis. 8 superior individual plants were selected from the second and third groups. The superior individual plants showed major traits as compact plant type, more inflorescences per plant, and excellent resistance to stress. All these traits were important utilization value in breeding of ornamental fountain grass.