杉木2代种子园子代主要经济性状遗传变异及单株选择  

Genetic Variation and Individual Plant Selection of Main Economic Traits of Progenies from the Second-generation Seed Orchards of Chinese Fir

作　　者：何贵平[1] 徐永勤 齐明[1] 沈凤强 张建忠 骆文坚 

机构地区：[1]中国林业科学研究院亚热带林业研究所,浙江富阳311400 [2]浙江省杭州市余杭区长乐林场,浙江余杭311123 [3]浙江省林业种苗管理总站,浙江杭州310020

出　　处：《林业科学研究》2011年第1期123-126,共4页Forest Research

基　　金：国家"十一五"科技支撑项目"高产优质多抗杉木新品种选育"(2006BAD01A14);浙江省科技厅重大项目"优质珍贵用材树种新品种创制及高效培育关键技术研究与示范"(2008C02004-2);浙江省与中国林科院林业科技合作项目"杉木高世代育种群体建立和优质速生新品种选育"(2007SY09)

摘　　要：杉木（Cunninghamia lanceolata （Lamb.） Hook.）作为我国南方林区重要的用材树种,经过几十年的遗传改良已进入到高世代时期,遗传改良工作取得了较大进展,林木生长量也已获得较大增长。20世纪90年代初浙江省从杉木1代种子园家系子代测定林、杂交试验林和种源试验林中选择出优良材料营建了2代种子园，The three main economic traits of DBH,DBH of dominant tree and wood basic density of dominant tree in 13-year-old progeny stand from the second-generation seed orchards of Chinese fir in Changle of Yuhang district,Zhejiang province were analyzed.The results showed that three economic traits were highly significant on each trait among the families,and their broad heritability was high.The genetic correlation coefficient was weakly negative correlated among growth traits and wood basic density.The correlation coefficient was significant positive correlated among 3-year-old tree height,7-year-old tree height and DBH,13-year-old DBH.Ten better families and individual plants were selected in interim period by index method with two traits of DBH and wood basic density,keeping wood basic density unchanged to compared with experiment population,the average DBHs of the family and individual plant were 7.59% and 59.16% higher than the experiment population respectively.

关 键 词：杉木 2代种子园 子代 主要经济性状 遗传变异 单株选择 

分 类 号：S791.27[农业科学—林木遗传育种]