10年生油杉家系子代生长差异分析及选择

Analysis of Growth Difference and Selection of Family Progeny of 10-year-old Keteleeria fortunei

  • 摘要: 于2024年,在福建省永春碧卿国有林场对32个10年生油杉家系子代的生长特征进行调查分析。结果表明:家系间的胸径、树高、单株材积等性状差异均达到极显著水平,胸径均值9.07 cm,变异系数(CV)8.59%~41.16%;树高均值5.96 m,变异系数(CV)6.37%~33.86%;单株材积均值0.0261 m3,变异系数(CV)28.16%~110.49%。聚类分析结果表明,32个油杉家系分为"优秀型""良好型""一般型""较差型"4种类型,其中"优秀型"油杉家系的胸径、树高、材积均值分别为14.59 cm、8.78 m、0.0843 m3,分别超出整体平均水平的60.86%、47.32%、222.99%,比对照组(莆田1号)超出75.57%、57.35%、346.03%。油杉家系胸径、树高、材积遗传力分别为0.721、0.792、0.833。平均遗传增益在15%以上的油杉家系有7、9、13、19、31、32号等6个家系,这6个优良家系可作为油杉良种进行申报和推广。

     

    Abstract: In 2024,the growth characters of 32 10-year-old Keteleeria fortunei family progenies from Yongchun Biqing State-owned Forestry Farm were investigated and analyzed in this paper.The results showed that there were significant differences among families in tree DHB,height and individual volume.The average DBH was 9.07 cm,the coefficients of variation(CV)of traits were 8.59%~41.16%.The average tree height was 5.96 m,the coefficients of variation(CV)of traits were 6.37%~33.86%.The average individual volume was 0.0261 m3,the coefficients of variation(CV)of traits were 28.16% ~ 110.49%.By cluster analysis,32 Keteleeria fortunei families were divided into 4 types:"excellent type","good type","average type" and "poor type".Among them,the average DBH,tree height and volume of "excellent type" Keteleeria fortunei families were 14.59 cm,8.78 m and 0.0843 m3,respectively,which were 60.86%,47.32% and 222.99% higher than the overall average,and 75.57%,57.35% and 346.03% higher than the control group(Putian No.1).The heritability of DBH,tree height and volume were 0.721,0.792 and 0.833,respectively.There were 6 families with an average genetic gain of more than 15%,including 7,9,13,19,31 and 32.The analysis results suggested that these 6 excellent families could be applied and promoted as improved strains of Keteleeria fortunei.

     

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