摘要
【目的】对毛红椿种源家系幼林生长性状差异进行研究,筛选早期生长性状优良的毛红椿种源/家系,揭示其地理变异规律,以推进毛红椿遗传改良工作。【方法】以毛红椿5个种源11个家系为研究对象,调查树高、胸径等生长性状,对不同种源/家系生长性状进行遗传变异分析及相关性分析,并利用遗传增益进行优良种源/家系选择。【结果】毛红椿早期生长性状在种源、家系间均存在极显著差异(P<0.01);14号家系(江西宜丰)在树高、胸径、材积等方面表现最好且生长最快,1号家系(安徽泾县)和4号家系(安徽泾县)生长相对较慢,且2号、13号、14号、15号的连年生长量靠前;树高、胸径和材积的变异系数分别为25.39%~32.74%、31.94%~36.55%、80.81%~91.21%,5年生毛红椿测定林的变异系数为材积>胸径>树高,其遗传力分别为0.586~0.894、0.749~0.852、0.643~0.780;相关性分析结果表明,除生长性状与无霜期,5年生枝下高与经度、年均降水量的相关性未达显著外,各生长性状之间相关性达极显著水平(P<0.01),各生长性状与经纬度呈现极显著负相关(P<0.01),与年均气温、年均降水量呈现极显著正相关(P<0.01)。根据主成分分析结果进行综合评价,初步选出3个优良家系(12号、13号、14号),其中14号家系树高、胸径、材积的遗传增益分别为14.94%、16.59%、38.20%。【结论】毛红椿的生长性状在种源和家系间都存在着丰富的遗传变异,在地理上呈现明显的“双向渐变型”。初步筛选的14号(江西宜丰)家系不仅生长优良,且有着较高的遗传增益,可作为推广使用的首选家系,可以为毛红椿选育工作提供基础。
[Objective]This study aims to explore the differences in growth traits of young forests of Toona ciliata var.pubescens provenances and families.The provenances/families with excellent early growth traits were screened,and their geographical variation rules were revealed,so as to promote the genetic improvement of Toona ciliata var.pubescens.[Method]Taking 11 families of 5 provenances of T.ciliata var.pubescens as the research objects,the growth traits including tree height and diameter at breast height were investigated.The genetic variation and correlation analysis of growth traits of different provenances/families were analyzed,and the genetic gain was used to select excellent provenances/families.[Result]There were significant differences in early growth traits among provenances and families(P<0.01).No.14(Yifeng,Jiangxi)had the best performance and fastest growth in tree height,diameter at breast height and volume,while No.1(Jingxian,Anhui)and No.4(Jingxian,Anhui)grew relatively slowly.The annual growth of No.2,No.13,No.14 and No.15 was higher.The variation coefficients of tree height,diameter at breast height and volume were 25.39%-32.74%,31.94%-36.55%and 80.81%-91.21%,respectively,the variation coefficients of 5-year-old T.ciliata var.pubescens forest were ranking as follows:volume>diameter at breast height>tree height,and their heritability were 0.586-0.894,0.749-0.852 and 0.643-0.780,respectively.The results of correlation analysis showed that except for the correlation between growth traits and frost-free period,the correlation between 5-year old branch height and longitude and annual average precipitation was not significant,the correlation between each growth trait reached extremely significant level(P<0.01).Each growth trait showed extremely significant negative correlation with longitude and latitude(P<0.01),and extremely significant positive correlation with annual average temperature and annual average precipitation(P<0.01).Comprehensive evaluation was conducted according to the results of principal component analysis.Three excellent families(No.12,No.13 and No.14)were preliminarily selected.The genetic gains of tree height,diameter at breast height and volume of No.14 family were 14.94%,16.59%and 38.20%,respectively.[Conclusion]The growth traits of T.ciliata var.pubescens has rich genetic variation among provenances and families,and shows obvious‘two-way gradient’in geography.The preliminary screening of No.14(uanshan)family not only grows well,but also has a high genetic gain.It could be used as the preferred family for popularization and application,and could provide the basis for the breeding of Toona ciliata var.pubescens.
作者
吴云燕
张露
刘远生
程强强
苏仁峰
潘俊彬
刘军
刘玮
马际凯
WU Yunyan;ZHANG Lu;LIU Yuansheng;CHENG Qiangqiang;SU Renfeng;PAN Junbin;LIU Jun;LIU Wei;MA Jikai(College of Forestry,Jiangxi Provincial Key Laboratory of Silviculture,2011 Collaboration Innovation Center of Jiangxi Typical Trees Cultivation and Utilization,Jiangxi Agricultural University,Nanchang 330045,China;Anfu Mingyueshan Forestry Centre of Jiangxi Province,Ji’an,Jiangxi 343200,China;Institute of Subtropical Forestry,Chinese Academy of Forestry,Hangzhou 311400,China)
出处
《江西农业大学学报》
CAS
CSCD
北大核心
2024年第1期106-117,共12页
Acta Agriculturae Universitatis Jiangxiensis
基金
国家重点研发计划项目(2016YFD060060605)。
关键词
毛红椿
生长性状
遗传变异
种源/家系选择
Toona ciliata var.pubescens
growth traits
genetic variation
provenance/family selection
