‘鄂选1号’山桐子组培无性系种苗调查分析

Investigation of Clonal Seedlings of Idesia polycarpa‘Exuan 1’Through Tissue Culture

为探究组培无性系在早期的表现特征,初步确定无性系的一致性,并且探索山桐子良种选育的早期评价方法,选择2年生的‘鄂选1号’山桐子组培无性系种苗作为研究对象,通过对苗高、地径、分枝数、枝下高、冠幅、分枝长度与分枝角、分枝间夹角等指标进行调查分析,对其地上部分的营养器官进行表型评价。研究结果显示,2年生的‘鄂选1号’山桐子组培无性系种苗平均地径为18.40 cm,平均苗高为128.5cm,平均枝下高为71.67cm;分枝数均为5,随着分枝位置的升高,分枝的平均长度呈逐渐减小的趋势,并且符合Logistic模型;分枝角度相对一致,平均为52.83°,垂直位置上相邻分枝的夹角相对稳定,平均为142.19°,水平投影上相邻分枝的夹角也比较一致,平均为72°。结果表明,‘鄂选1号’山桐子组培无性系种苗具有较好的一致性。

This study aims to investigate the early performance characteristics of asexual lines derived from tissue culture,preliminarily establish the uniformity of these lines,and explore early evaluation methods for the selection of superior Idesia polycarpa varieties.Two-year-old I.polycarpa‘Exuan 1’tissue culture asexual saplings were selected as the research subjects.The study involved an analysis of various parameters,including sapling height,ground diameter,number of branches,height under the branch,crown width,branch length and angle,and the angle between branches.A phenotypic evaluation of the above-ground vegetative organs was conducted.The results showed that the average ground diameter of the two-year-old I.polycarpa‘Exuan 1’tissue culture asexual saplings was 18.40 cm,with an average height of 128.5 cm,and an average height under the branch of 71.67 cm.The number of branches was consistently five,and as the position of the branches rose,the average length of the branches tended to decrease,following a Logistic model.The branching angles were relatively consistent,averaging 52.83°.The angle between vertically adjacent branches remained relatively stable,averaging 142.19°,and the angle between horizontally adjacent branches was also consistent,averaging 72°.These findings indicate that the I.polycarpa‘Exuan 1’tissue culture asexual saplings demonstrate good uniformity.