湿地松15个家系木材材性遗传变异及优良家系评估  

Genetic Variation and Comprehensive Assessment in Wood Properties of 15 Fmilies of Pinus elliottii

作　　者：骆秀琴[1] 姜笑梅[1] 殷亚方[1] 刘昭息[2] 

机构地区：[1]中国林业科学研究院木材工业研究所,北京100091 [2]中国林业科学研究院亚热带林业研究所,浙江富阳311400

出　　处：《林业科学研究》2003年第6期694-699,共6页Forest Research

基　　金：国家"九五"国家科技攻关"工业用材林材质材性和功能性改良技术研究"(96 011 03 05)专题的部分内容

摘　　要：对浙江产湿地松15个家系的基本材性进行了测定与分析。结果表明:家系间管胞长度、管胞宽度、气干密度、抗弯强度、抗弯弹性模量、顺纹抗压强度差异极显著,管胞壁厚差异显著,胞壁率、冲击韧性差异未达显著水平。家系内管胞长度、管胞宽度、管胞壁厚差异均显著且高于家系间的差异,但气干密度、顺纹抗压强度、胞壁率和冲击韧差异不显著,表明在家系水平上进行木材气干密度、力学强度和管胞形态的家系选择可取得良好的效果。15个家系木材管胞长度、管胞宽度、管胞壁厚和胞壁率的广义遗传力分别为0 5466、0 3910、0 7173、0 1598,说明湿地松家系木材管胞性状(胞壁率除外)受中度或中下度遗传控制,通过一定强度的选择能获得较高的遗传增益。综合评定结果表明,04 28、06 17、06 20、08 7和08 9,5个家系为适用于培育纸浆材的优良家系,04 25、04 28、06 17、06 20和08 16,5个家系为适用于培育建筑材的优良家系。The main wood properties of 15 families of Pinus elliottii in Changle Forest Farm,Zhejiang Province were carried out. The results showed that there existed significant differences among these families in wood air-dry density, bending strength, modulus of elasticity, compressive strength, tracheid length, tracheid width as well as tracheid wall thickness, but in cell walls percentage and toughness, there were not significant differences,although the differences in tracheid length, tracheid width and wall thickness of intra-families were higher than those of inter-families. There were no significant differences in air-dry density, compressive strength cell wall percentage and toughness for intra-families. As a result, it was probably effective in inter-families selection according to wood air-dry density, mechanical strength and tracheid morphology. The broad-sense heritabilities for wood tracheid length (0.546 6), width (0.391 0),wall thickness (0.717 3), cell walls percentage(0.159 8) of 15 familis were calculated, these results indicated that wood tracheid morphology (except cell walls percentage) were under morderate or low-morderate genetic control, so high genetic gains could be gained by inter-families selection of suitable intension. By means of comprehensive assessment,the results were as following: 04-2806-1706-2008-7 and 08-9 families were more suitable for use of pulpwood, 04-2504-2806-1706-20 and 08-16 families were more suitable for utilization of construction timber.

关 键 词：湿地松 家系 木材材性 遗传变异 综合评定 

分 类 号：S791.246[农业科学—林木遗传育种]