火炬松种源遗传变异研究及纸浆材优良种源评选　Ⅱ.间接选择和指数选择  

Genetic Study and Superior Provenance Selection of Loblolly Pine for Pulpwood Ⅱ. Indirect and Index Selection for Superior Provenance

作　　者：刘昭息[1,2] 孙海菁[1,2] 吕本树[1,2] 姜景民 徐有明[1,2] 

机构地区：[1]中国林业科学研究院亚热带林业研究所 [2]华中农业大学

出　　处：《林业科学研究》1997年第4期395-401,共7页Forest Research

基　　金：国家"八五"科技攻关项目;浙江省"八五"科技攻关项目

摘　　要：经对浙江富阳点１１年生火炬松种源林生长性状和木材基本密度指标所作的早晚期相关分析表明，在中龄林阶段，以５～６年生作为火炬松种源早期选择的最低年龄是可行且较可靠的。在同一种源林中，当入选率为１０％时，采用树高或胸径来间接选择材积和干材干物质重可获得１５％以上的遗传增益；应用恰当的指数来选择纸浆材种源可使指数相对效率达到６５％以上。在４片种源林中，用多性状综合选择法共筛选出１０个速生、优质、高产的种源，入选种源的平均现实增益和遗传增益，树高分别为６．９４％和４．５９％，胸径为８．３８％和５．５５％，材积为２０．００％和１３．２４％，木材基本密度为１．６３％和１．０８％，干材干物质重为２４．７８％和１６．４０％。The age-age correlation analyses of growth traits and wood property of 11 year old provenance test in Fuyang, Zhejiang showed that, 5～6 a was feasible and reliable minimum age to select loblolly pine pulpwood provenances in middle aged stand. In the same test, using indirect selection for stem volume and dry weight by growth traits ,the genetic gain were above 15% when the selection rate was 10%, and to select provenances for pulpwood based on appropriate selection index, the relative selection efficiency can reached above 60%. Selection indices were constructed for 4 provenance tests, and 10 high yielding and high quality provenances were selected, their average phenotypic and genetic gains of tree height were 6.94% and 4.59%,of tree diameter were 8.38% and 5.55%, of stem volume were 20.00% and 13.24%,of wood density were 1.63% and 1.08%, of stem dry weight were 24.78% and 16.40%.

关 键 词：火炬松 纸浆材种源 间接选择 遗传变异 

分 类 号：S791.255[农业科学—林木遗传育种]