秃杉优树自由授粉子代测定研究  

Open-Pollination Progeny Test for Superior Tree of Taiwania flousiana

作　　者：王明怀[1] 陈建新[1] 谢金链 梁胜耀 黄越茂 梁仕威 

机构地区：[1]广东省林业科学研究院,广东广州510520 [2]广东省林业种苗与基地管理总站,广东广州510172 [3]广东省肇庆市国有林业总场,广东肇庆526020

出　　处：《华南农业大学学报》2009年第1期60-63,68,共5页Journal of South China Agricultural University

基　　金：广东省科技计划项目“濒危树木秃杉优良品种在生态公益林的应用”(2002C40108)

摘　　要：通过对24个秃杉Taiwania flousiana优树自由授粉子代、台湾杉T.cryptomerioides和香杉Cunninghamia kon-ishii的苗期及田间造林试验,观测分析了3树种场圃发芽率及高生长节律特征,用Marquardt方法拟合了Logistic苗高生长曲线,利用6年生秃杉自由授粉家系和台湾杉生长性状数据,采用方差分析法分析树种间差异显著性,以及秃杉自由授粉家系间差异显著性,并估算秃杉生长性状遗传参数,初步选择了6个优良的秃杉优树自由授粉家系.结果表明:秃杉、台湾杉和香杉3树种的平均场圃发芽率分别为9.1%、11.3%和1.3%,一年生平均苗高为25.1、22.9和24.4 cm,3树种苗高生长速生期开始及结束日期依次推后;秃杉与台湾杉的生长性状树种间差异显著,秃杉的生长性状家系间差异显著;秃杉自由授粉家系的胸径、树高和单株材积的遗传力分别为0.88、0.87和0.91,从19个家系中选择6个优良家系,单株材积遗传增益为52.6%,现实增益为58.1%.Seedling and field afforestation test for 24 open-pollination progenies of superior trees, i. e. , Taiwaniaflousiana, Taiwania cryptomerioides and Cunninghamia konishii, were carried out. The research included 3 species＇ nursery germination rate and height rhythm, curve fitting using Logistic growth model of seedling height by the Marquardt method, significance comparison between species and among T. flousiana open-pollination families by variance analysis method with 6-years-old data, and an evaluation of genetic parameter of T. flousiana growth straits. 6 excellent T. flousiana open-pollination families were tentatively selected. The average nursery germination rate of the 3 species were 9. 1% , 11.3 % and 1.3% , respectively. The average height of 1-year-old seedling were 25.1,22. 9 and 24.4 cm. The start- ing and ending date of fast growing period for seedling height growth of the 3 species came later consecutively. The differences of growth traits were significant between species, and among T. flousiana open- pollination families. Heritabilities for DBH, height, single volume of T. flou3iana open-pollination family were 0. 88, 0. 87, and 0.91, respectively, six families were selected for 19 families with genetic gain of 52. 6% and realized gain of 58.1%.

关 键 词：秃杉 台湾杉 香杉 优树自由授粉子代 遗传力 

分 类 号：S722.3[农业科学—林木遗传育种]