桤木种源的地理变异和种源区划  

Geographical variation and provenance division of Alnus cremastogyne

作　　者：王军辉[1] 顾万春[1] 夏良放[2] 万军[3] 干小雄[3] 

机构地区：[1]中国林业科学研究院林业研究所 [2]中国林业科学研究院亚热带林业实验中心,江西分宜336600 [3]四川省林业科学研究院,四川成都610081

出　　处：《浙江林学院学报》2005年第5期502-506,共5页Journal of Zhejiang Forestry College

基　　金："八五""九五"国家科技攻关项目(96-014-03-01);世界银行资助项目(FRDPP;09-07)

摘　　要：以桤木Alnus cremastogyne自然分布区内13个种源的生长、材性和果实等性状为研究对象,研究了桤木的地理变异及其趋势,探讨了地理变异的气候生态学基础,并划分了种源区。研究表明,桤木种源生长性状与生态梯度值(EGA)的相关显著,在单个生态因子分析中,桤木种源生长量呈以经度和海拔为主的梯度变异。单株生物质产量和纤维长度与经度和纬度的相关关系不显著,地理趋势并不明显。而木材基本密度与经度的正相关关系显著,呈单向渐变模式。根据桤木种源EGA和试验林生长表现,把桤木划分为3个种源区:盆西北周沿区、盆中区和盆南周沿区。The growth, timber quality and fruits of 13 provenances of Alnus cremastogyne was tested to study the geographical variation of Alnus cremastogyne and its tendency. The climate ecology foundations for the geographical variation and divided the provenance areas were discussed. The results implied that there was significant correlation between provenance growth characteristics of Alnus cremastogyne and ecological gradient axis （EGA）. The analysis of single ecological factor showed that the provenance growth quantity of Alnus cremastogyne changed with the longitude and altitude. There was no significant correlation between the bio-substance production and fiber length of single plant and longtitude and latitude. There was significant correlation between the basic density of timber and longitude. Judging by the EGA of Alnus cremastogyne provenance and the growth status of the experimental forest, there＇re three provenance areas of Alnus cremastogyne, namely, northwest Sichuan, central Sichuan and south Sichuan. [Ch, 1 fig. 4tab. 11 ref.]

关 键 词：林木育种学 桤木 种源 地理变异 种源区划 

分 类 号：S722.3[农业科学—林木遗传育种]