20个红椿半同胞家系在湘北低丘生长比较及优良家系选择  

Growth comparison and excellent families selection among 20 half-sib families of Toona ciliata in low hills of northern Hunan

作　　者：潘军球 程勇[2] 廖德志[2] 张珉[2] 魏志恒 谭华元 吴哲 PAN Junqiu;CHENG Yong;LIAO Dezhi;ZHANG Min;WEI Zhiheng;TAN Huayuan;WU Zhe(Miluo City State-owned Baishui Nursery,Miluo 414400,Hunan,China;Hunan Academy of Forestry,Changsha 410004,Hunan,China;Zhuzhou Forestry Bureau,Zhuzhou 412000,Hunan,China;Hunan Huizhi Agriculture and Forestry Engineering Consulting and Design Co.,Ltd.,Changsha 410004,Hunan,China)

机构地区：[1]汨罗市国有白水苗圃,湖南汨罗414400 [2]湖南省林业科学院,湖南长沙410004 [3]株洲市林业局,湖南株洲412000 [4]湖南汇智农林工程咨询设计有限公司,湖南长沙410004

出　　处：《湖南林业科技》2025年第2期54-60,共7页Hunan Forestry Science & Technology

基　　金：国家林业公益性行业科研专项(201504301)。

摘　　要：以20个13年生红椿半同胞家系为研究对象,探讨其生长性状,并对遗传特性进行了综合评价。结果表明:20个13年生红椿半同胞家系间树高、胸径、单株材积、枝下高、冠幅均存在极显著差异(P<0.01),具有较高的遗传改良潜力;树高、胸径、冠幅和单株材积的家系遗传力均在0.90以上,受遗传因素影响较大;20个家系中,以TC12生长最好,树高、胸径、单株材积、枝下高、冠幅分别为15.27m、23.73cm、0.3232m3、5.70m、5.37m,遗传增益最高达到38.21%;以胸径、树高和单株材积生长为依据,通过分类比较,筛选出TC12、TC20、TC02、TC15、TC03和TC04这6个优良家系,平均遗传增益为26.27%,遗传增益高,生长优势明显,可作为早期选择的优良家系。Taking 20 half-sib families of 13-yea-old Toona ciliata as the research objects,the growth traits of half-sib families were studied,and their genetic characteristics were comprehensively evaluated.The results showed that there were extremely significant differences in tree height,DBH,individual volume,branch height and crown width among 20 half-sib families of 13-yea-old Toona ciliata(P<0.01),which had high genetic improvement potential.The family heritabilities of tree height,DBH,crown width and individual volume were above 0.90,which were greatly afected by genetic factors.Among the 20 families,TC12 grew best,with tree height,DBH,individual volume,branch height and crown width of 15.27 m,23.73 cm,0.3232 m3,5.70 m and 5.37 m,respectively,and the genetic gain was up to 38.21%.Based on the growth of DBH,tree height and individual volume,six superior families of TC12,TC20,TC02,TC15,TC03 ad TC04 were selected by classification and comparison,the average genetic gain of which was 26.27%indicating that the growth advantage of themwas obvious and the genetic gain was high and they could be taken as excellent families for early selection.

关 键 词：红椿 生长性状 遗传增益 家系遗传力 

分 类 号：S722.89[农业科学—林木遗传育种]