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时间:2020-03-25
《杉木无性系生长和木材品质性状遗传变异研究.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、南方农业学报JournalofSouthernAgrieuhure2014,45(9):1626—1631ISSN2095—1191;CODENNNXAABDOI:10.3969/j:issn.2095—1191.2014.9.1626杉木无性系生长和木材品质性状遗传变异研究李荣丽,黄寿先+,梁机,周传明,何长虹,李龙梅,唐国强(广西大学林学院/国家林业局中南速生材繁育重点实验室,南宁530005)摘要:【目的】研究杉木无性系生长f生状和木材品质性状的遗传变异规律,为广西杉木栽培区选择优良无性系、提高广西杉木人工林经营效益
2、提供参考。【方法】对34个杉木无性系的单株材积、木材基本密度和管胞形态性状进行方差分析,估算无性系重复力、遗传相关和遗传增益等遗传参数,采用多性状综合指数选择方法选出生长性状与木材品质兼优的杉木无性系并估算遗传增益。【结果】杉木的生长性状具有丰富的遗传变异,变异系数较大的是材积、胸径和树高,其变异系数分别为41.06%、16.44%和12.41%。杉木无性系间的胸径、树高、材积、木材基本密度、管胞长度和管胞宽度差异极显著(P3、度与胸径、树高、材积、管胞长度、管胞宽度在表型相关和遗传相关上呈负相关。采用多性状综合选择指数法选出3个优良无性系,其胸径、树高、材积、木材基本密度、管胞长度、管胞宽度、管胞长宽比的遗传增益分别为9.83%、7.58%、24.60%、一3.92%、4.65%、2.12%和1.26%。【结论】杉木无性系间具有良好的选择潜力,采用多f生状综合指数选择法可以选出生长性状与木材品质兼优的杉木无性系。关键词:杉木;无性系;木材品质;遗传变异中图分类号:$791.27文献标志码:A文章编号:2095—1191(2014)09—16264、—06GeneticvariationofgrowthtraitsandwoodpropertiesinChinesefirclonesLIRong—li,HUANGShou-xian+,LIANGJi,ZHOUChuan—ming,HEChang—hong,LILong-mei,TANGGuo—qiang(ForestryCollege,GuangxiUniversity/KeyLaboratotTofFast-growingTreeBreedinginCentralSouthChinaofStateForestryAd5、ministration,Nanning530005,China)Abstract:【Objective】G:enetievariationofChinesefirclonesongrowthtraitsandwoodpropertieswasstudiedtoprovidereferencesforselectingsuperiorcloYlesincultivationareasandboostingplantationbenefitsinGuangxi.【Method】First,thedifterencesofin6、dividualtreevolunle(V),woodbasicdensity(WBD)andIraeheidshaDe(TS)betweencloneswereanalyzed.Thentheclonalrepeatabilityandgeneticcon'elationwerecalculated.Lastly,Chinesefircloneswithgoodgrowthtraitsandwoodqualitywereselectedbasedoncomprehensiveindexofmuhipletraitsse—7、leetion,andthegeneticgainsoftheselectedcloneswereestimated.【Result】TherewereextensivegeneticvariationsbetweenclonesongrowthIraitsandwoodproperties.ThecoefficientofvariationonV,diameteratbreastheight(DBH),andtreeheight(H)was41.06%,16.44%,and12.41%.Extremelysignific8、antditterencefP<0.01)WasdemonstratedbetweenclonesonDBH,H,V,WBD,Iraeheidlength(TL),andIraeheidwidthfTW).TheratiooflengthtowidthofIraeheid(RLWT)alsoditter
3、度与胸径、树高、材积、管胞长度、管胞宽度在表型相关和遗传相关上呈负相关。采用多性状综合选择指数法选出3个优良无性系,其胸径、树高、材积、木材基本密度、管胞长度、管胞宽度、管胞长宽比的遗传增益分别为9.83%、7.58%、24.60%、一3.92%、4.65%、2.12%和1.26%。【结论】杉木无性系间具有良好的选择潜力,采用多f生状综合指数选择法可以选出生长性状与木材品质兼优的杉木无性系。关键词:杉木;无性系;木材品质;遗传变异中图分类号:$791.27文献标志码:A文章编号:2095—1191(2014)09—1626
4、—06GeneticvariationofgrowthtraitsandwoodpropertiesinChinesefirclonesLIRong—li,HUANGShou-xian+,LIANGJi,ZHOUChuan—ming,HEChang—hong,LILong-mei,TANGGuo—qiang(ForestryCollege,GuangxiUniversity/KeyLaboratotTofFast-growingTreeBreedinginCentralSouthChinaofStateForestryAd
5、ministration,Nanning530005,China)Abstract:【Objective】G:enetievariationofChinesefirclonesongrowthtraitsandwoodpropertieswasstudiedtoprovidereferencesforselectingsuperiorcloYlesincultivationareasandboostingplantationbenefitsinGuangxi.【Method】First,thedifterencesofin
6、dividualtreevolunle(V),woodbasicdensity(WBD)andIraeheidshaDe(TS)betweencloneswereanalyzed.Thentheclonalrepeatabilityandgeneticcon'elationwerecalculated.Lastly,Chinesefircloneswithgoodgrowthtraitsandwoodqualitywereselectedbasedoncomprehensiveindexofmuhipletraitsse—
7、leetion,andthegeneticgainsoftheselectedcloneswereestimated.【Result】TherewereextensivegeneticvariationsbetweenclonesongrowthIraitsandwoodproperties.ThecoefficientofvariationonV,diameteratbreastheight(DBH),andtreeheight(H)was41.06%,16.44%,and12.41%.Extremelysignific
8、antditterencefP<0.01)WasdemonstratedbetweenclonesonDBH,H,V,WBD,Iraeheidlength(TL),andIraeheidwidthfTW).TheratiooflengthtowidthofIraeheid(RLWT)alsoditter
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