不同群体厚朴苗期主要性状观测分析

采集来自湖北、广西和浙江种源的厚朴半同胞家系成熟种子,湿沙保存后进行实生育苗试验,观测幼苗的出苗、生长等情况;落叶后统计幼苗株高、地径等情况。结果表明:不同种源厚朴幼苗生长过程基本一致,分为出苗期,生长初期,快速生长期和落叶期;一年生幼苗平均株高、地径最高为广西种源(47.04 cm,0.90 cm),最低为湖北种源(29.07 cm,0.78cm);不同种源厚朴幼苗之间株高差异达到极显著水平,地径差异不显著;湖北种源家系间地径差异极显著,株高差异显著。广西种源家系间株高差异极显著,地径差异不显著。浙江景宁种源家系间幼苗株高、地径均差异不显著;家系内单株间株高、地径均差异极显著。一年生厚朴幼苗株高生长最快为广西种源,浙江种源次之,湖北种源最慢,地径生长差别不大;半同胞家系内差异极显著,在厚朴良种选育过程中应充分重视优良种源、优良家系与优良单株的配合选择。

Main Traits Observation of Young Growth Families of Magnolia Officinalis From Different Groups

Half sib seeds of Magnolia officinalis kept in wet sand were collected from Hubei,Guangxi and Zhejiang provenance.Seedling emergence and growth situation were observed and studied.Plant height and ground diameter situa-tion were recorded in winter.The results showed that the growth situation of M.officinalis from different places were basically consistent that it could be roughly divided into seedling stage,growth stage,rapid growth period and defoliation;The highest of average height and diameter of annual seedling was Guangxi source(47.04 cm and 0.90 cm),the minimum was Hubei provenance (29.07cm,0.78 cm).Difference of seedling plant height reached extremely significant level be-tween different provenances while the diameter difference was not significant;It had extremely significant diameter difference and significant height difference between families from Hubei provenance.It had extremely significant height difference and no significant diameter difference between families from Guangxi provenance.It didn’t have significant diameter difference between families fromZhejaing provenance,but significant height difference.It had extremely signif-icant diameter difference and extremely significant height difference between singles.Annual seedlings of Magnolia offici-nalis from Guangxi provenances had the fastest high growth ,Hubei provenance was the last while difference diameter growth was almost the same;Half sib families had extremely significant difference.It should be payed full attention to the selection of superior provenances,families and superior individual,in the process of breeding of M.officinalis.