元宝枫无性系幼龄期枝叶性状变异分析

摘要

To select superior varieties of Acer truncatum Bunge clones,six clone populations from selec-tive breeding were chosen to analyze the variability of 1 4 traits,such as growth,branch gesture,leaf shape and leaf color.And colorimeter was firstly employed to define the leaf color quantitatively.The results were as fol-lows:(1 )The variation coefficients of 1 4 traits ranged from 0.0439 to 0.3680,and there were all highly sig-nificant or significant differences except ground diameter (X2 ),petiole curvature (X1 1 ),leaf color value a (X1 3 )and leaf color value b (X1 4 ).It indicated that the variations of branches and leaves were abundant. (2)Except the leaf color value a and leaf color value b,the repeatability of branch and leaf characters were between 0.5343 and 0.8380,which suggested that these traits were moderate to high genetic control charac-ters.It indicated that environment had low effects on most traits.(3)Correlation analysis indicated that seed-ling height (X1 )was highly significantly positively related to branch curvature (X4 ),which showed that the clone populations growing faster and higher possessed softer and more pliable branches.%为进行元宝枫无性系的良种选择，以新选育的6个元宝枫无性系为试验材料，对其生长、枝姿、叶形和叶色等14个性状进行变异性分析，其中首次使用色差仪对叶色进行数量化分析。结果表明：（1）无性系间14个性状的变异系数在0．0439～0．3680之间，除去地径（X2）、叶柄弯度（X11）、叶色 a 值（X13）、叶色 b 值（X14）差异不显著外，其他性状均存在极显著或显著差异，表明枝叶性状的遗传变异较为丰富；（2）除叶色 a值（X13）与叶色 b 值（X14）的重复力较低外，其他性状重复力在0．5343～0．8380之间，属于中等偏高遗传控制性状，表明大多数性状受环境影响较小；（3）相关性分析表明：苗高（X1）与枝条弯度（X4）呈极显著正相关，表明苗高增长快的元宝枫无性系，枝条易柔软下弯。