图2. 北京地区小清河样地芦苇多态性分析
(A) 小清河样地全景图(6个芦苇克隆群体C1-C6分别用不同颜色的矩形虚线框标出); (B) 6个芦苇群体的株高和基径的相关性分析(灰色阴影部分为回归区间, 红色虚线为最佳回归曲线); (C) 芦苇多态性的主成分分析(依据表2中8项形态学指标绘制), 按照置信概率95%框选每种芦苇群体; (D) 芦苇小穗的代表性照片(bars=5 mm)

Figure 2. Polymorphism analysis of Phragmites australis in the Xiaoqing River plot
(A) Panoramic view of the Xiaoqing River plot (six different reed clones C1-C6 are marked by rectangular dashed boxes of different colors); (B) Correlation analysis of height and base diameter of six different reed clones (The gray shaded part is the regression interval, and the red dotted line is the best regression curve); (C) Principal component analysis of polymorphism in the reed plot of Xiaoqing River (based on eight morphological indicators of six species of reed clones in Table 2), selecting each reed clone according to 95% confidence probability; (D) Representative photos of spikelets (bars=5 mm)