摘要
利用设置在分布区北缘江苏宁镇丘陵(句容、江宁)的各种试验测定林所收集的24个种源、50个江苏当地种源优树半同胞子代、17个产地间杂交组合子代490株平均木选择材料,以及融水种源山洼、山谷、山坡3种栽植立地,3000、4950、6000株·hm-23种栽植密度,以及6、8、10、15、18a等5个年龄组林分275株样木材料研究杉木木材的基本密度变异规律。结果表明,杉木全分布区试验不同种源,江苏种源优树自由受粉子代家系,江苏江宁×四川德昌种源产地杂交组合子代间有显著的遗传变异(依次为:F=6.71**>F0.01=2.40;F=3.87**>F0.01=2.19;F=2.63*>F0.05=2.36),具有选择改良潜力。栽植立地对融水种源幼龄材基本密度没有明显影响;林龄与栽植密度是引起木材基本密度变异的重要因素。供试测定材料基本密度与材积生长没有统计置信的负相关关系,性状间影响弱。杉木材性改良及生长与材性联合改良,可按“生长(材积)、材性(基本密度)两阶段独立选择法”进行改良。
Bytheuseoftechnologyofgeneticimprovment,thetestshavebeencollected24provenancesinlowhillarea(Jurong,Jiangning)ofitsnortherndistribution:50offspringsofelitetreesofhalfsibfamiliesofnativeprovenanceinJiangsu;490treesoftheoffspringsofhybridgroupsof17eliteprovenances;plantationfieldswere3groupsofmountainvalley,hillsideandgully;Plantationdensitieswere3000treeshm-2,4950treeshm-2and6000treeshm-2;and5agegrouptestswith275treeswere6,8,10,15and18yearold.ResearchresultsshowedthatamongtheprovenancesofJiangsu,offspringsofhalfsibfamiliesandeliteofwoodcharacterofoffspringofhybridgroupshadsingnificantgeneticvariance.ThewoodofbasicdensitiesofyoungtreesofeliteofRongshuiprovenancedidnthaveobviouseffectamongplantationfieldtests;ageandplantationdensities(30006000treeshm-2)aretheimportantfactors,causingthevarianceofwoodbasicdensitiesofChinesefir.ThewoodbasicdensitiesofChinesefirandgrowthcharacteristicsgenerallydidnthavenegativegeneticrelationship.Theimprovementofwoodcharacterorgrowthandcoimprovementofwoodcharactercanallbedo
出处
《林业科学研究》
CSCD
北大核心
1999年第2期179-184,共6页
Forest Research
基金
江苏省"九五"农业攻关课题
关键词
杉木
木材
基本密度
密度变异
育种
Chinesefir
woodbasicdensity
variance nebythetwostageindependentselection.ResearchresultsprovidedthefoundationtoselectandbreedelitecharacterandhighyieldChinesefir.