斑茅种质资源形态性状的变异研究

Variations of important morphological features of Erianthus arundinaceum germplasms

为了揭示不同斑茅(Erianthus arundinaceum)种质形态学特征多样性和变异程度,确定适合作为能源植物开发的斑茅种质,本研究对斑茅种质资源的11个形态学特征变异性进行了研究。结果表明,(1)不同斑茅种质资源的形态学特征存在广泛的变异,其中:茎粗变异幅度最大,变异范围为8.86～37.36mm,变异系数高达49.66%;其次为旗叶长和倒二叶宽,两者变异系数分别为45.10%和44.20%。(2)斑茅形态学特征间存在显著相关性,斑茅种质的株高越高,茎秆越粗壮,茎节数越多,花序数量越多,反之亦然。(3)聚类分析表明,不同斑茅种质资源可划分为三大类,源自不同地区的斑茅材料,形态相似的材料基本聚为一类。

An experiment was conducted to select the potential energy Erianthus arundinaceum germplasm resource by the variations of 11 morphologic features of Erianthus arundinaceum. This study showed that there were great variations in morphologic indicators, indicating that the range of internode diameter varia- tion was biggest and from 8.86 to 37.36 with 49.660/6o variance coefficient. The range of boot leaf length and width of the second leaf from the inflorescence variation came to the second and their variance coefficients were 45.10% and 44.20%, respectively. The higher plant height showed a significantly positive correlation with fertile tillers and inflorescence number. Clustering analysis showed that those accessions could be divided into 3 groups, indicating that accessions from different regions with similar characteristics were clustered into one group.