黑木相思自由授粉家系子代测定及早期选择  

Progeny Determination and Early Selection of Offspring in Open Pollination Families of Acacia melanoxylon

作　　者：陈奕璨 CHEN Yican(Quanzhou Luoxi State owned Forest Farm,Quanzhou,Fujian Province,Luojiang 362015,Fujian,China)

机构地区：[1]福建省泉州罗溪国有林场,福建洛江362015

出　　处：《福建林业科技》2024年第4期43-49,共7页Journal of Fujian Forestry Science and Technology

基　　金：福建省林木种苗科技攻关六期项目(19001A);福建农林大学科技创新项目(KFA19084A)。

摘　　要：为探索黑木相思生长规律、遗传变异情况和构建育种群体,于2019年对福建省泉州罗溪国有林场的黑木相思1代无性系种子园30个优良家系和澳大利亚引进的18个优良家系子代幼林进行测定。结果表明:3年生黑木相思试验林树高、胸径、单株材积和冠幅的均值分别为4.30 m、3.64 cm、0.0033 m^(3)和2.30 m,4个性状在不同家系间差异均达到极显著水平(P<0.01),变异系数分别为31.95%、38.77%、87.20%和30.74%,材积性状的变异最大;树高、胸径、材积和冠幅的家系遗传力分别0.5788、0.6268、0.6816和0.5220,单株遗传力分别为0.6776、0.5754、0.6808和0.4903,黑木相思在家系和单株水平上受到中等强度以上的遗传控制。利用基因型分类法将黑木相思家系分为4类生长类型。根据BLUP法估算家系育种值,以材积性状为指标(以20%的入选率),筛选出10个黑木相思优良家系(5、37、16、22、13、38、11、32、47、2号),这些优良家系可为黑木相思的遗传改良提供基础材料。In order to explore the growth patterns,genetic variations and construction of breeding populations of Acacia melanoxylon,30 excellent families from the first generation clonal seed orchard of Acacia melanoxylon in Luoxi State owned Forest Farm,Quanzhou,Fujian Province,and 18 offspring young forests from excellent families introduced from Australia were tested in 2019.The results showed that the average tree height,breast height diameter,individual volume,and crown width of the 3-year-old Acacia melanoxylon experimental forest were 4.30 m,3.64 cm,0.0033 m^(3) and 2.30 m,respectively.The differences in the four traits among different families reached a highly significant level(P<0.01),with coefficients of variation of 31.95%,38.77%,87.20%and 30.74%,respectively.The variation in volume trait was the largest;the genetic heritages of tree height,diameter at breast height,volume,and crown width in the family were 0.5788,0.6268,0.6816 and 0.5220,respectively.The individual genetic heritages were 0.6776,0.5754,0.6808 and 0.4903,respectively.The genetic control of Acacia melanoxylon was moderate to strong at both the family and individual plant levels.Using genotype classification,the Acacia melanoxylon family can be classified into four growth types.According to the BLUP method,the breeding value of the family was estimated,and 10 excellent families of Acacia melanoxylon(5,37,16,22,13,38,11,32,47,2)were selected based on the volume trait(with a selection rate of 20%).These excellent families can provide material basis for genetic improvement of Acacia melanoxylon.

关 键 词：黑木相思 子代测定 家系 早期选择 

分 类 号：S722.7[农业科学—林木遗传育种]