闽东南黑木相思优良家系早期选择

Early Selection of Excellent Families of Acac ia melanoxylon in Southeast Fujian

为了解黑木相思不同家系的生长特性和适应性,于2019—2021年,在福建省泉州市罗溪国有林场,对国内外生长较好的48个黑木相思家系进行子代测定试验,调查分析3年生黑木相思各家系胸径、树高、材积和枝下高等性状。经方差分析,胸径、树高、材积在不同家系间均存在显著差异。遗传参数估算结果表明,家系树高、胸径、材积遗传力分别为0.65、0.54、0.38,各性状受中等的遗传控制。综合选择出5个优良家系(5、27、32、35、44号),家系平均胸径、平均树高、平均单株材积分别为7.4 cm、7.4 m、0.0191 m~3,分别比总体平均值提高10.4%、12.3%、31.4%,其生长性状表现良好,具有较高的增益水平,可为闽东南引种黑木相思提供参考。

To study the growth characteristics and adaptability of different Acacia melanoxylon families,we conducted offspring assay tests on 48 families of Acacia melanoxylon with good growth both domestically and internationally at Luoxi State-Owned Forest Farm from 2019 to 2021.Analysis of variance(ANOVA)and genetic parameter estimation of diameter breast-high(DBH),tree height,wood volume,and height to crown base(HCB)of three-year-old Acacia melanoxylon families showed that there were significant differences among families.The heritability of tree height,DBH,and wood volume are 0.65,0.54,and 0.38,respectively,and each trait was under moderate genetic control.From them,we selected five excellent families,and the average DBH,average tree height,and average wood volume of the families were 7.4 cm,7.4 m,and 0.0191 m 3,respectively,which increased by 10.4%,12.3%and 31.4%.The excellent Acacia melanoxylon families showed good growth traits,had a high gain level,and could obtain high forest benefits,which provided a reference for the introduction of Acacia melanoxylon in southeast Fujian.