闽南山地桉树人工杂交子代性状测定及选择

为选育出一批产量高、抗性强、适合闽南山地栽植的桉树优良家系和优良单株,对闽南山地22个桉树杂种子代家系的生长性状进行分析。结果表明：不同杂种子代家系间的树高均存在显著到极显著的差异,在8.5年生和10年生时,胸径表现出显著到极显著的差异,单株材积表现出极显著的差异。10年生时,各个家系树高范围为15.61-23.79 m,胸径范围为13.13-20.99 cm,单株材积范围为0.1087-0.4021 m3。通过试验选出21号和5号2个杂交子代家系为优良家系,优良家系入选率为9.1%。通过对6个父本类型的子代生长表现进行比较,初步判断以尾叶桉为母本与以巨桉或巨尾桉为父本进行杂交,其子代在闽南地区表现突出。同时,通过试验选出了7株优于尾巨桉无性系-DH32-29的优良单株,其中21号家系中有4株,其单株材积范围为0.4761-1.6333 m3,比尾巨桉无性系-DH32-29高出22.42%-319.98%,家系内平均现实增益118.95%；5号家系中有3株,单株材积范围为0.4107-0.6864 m3,比尾巨桉无性系-DH32-29高出5.61%-76.50%,家系内平均现实增益75.49%。

Test and selection of the traits of artificial hybridization progeny of eucalyptus in the mountains of south Fujian

For breeding a group of pedigrees and fine individuals with high yield, strong resistance, and adaptability in southern Fujian mountain, the 22 participants eucalyptus hybrid progeny families was located in southern Fujian mountain, when they were 7.5-year-old, 8.5-year-old and 10-year-old, their growth traits and quality traits shape data were tested by ANOVA analysis. The results showed as follows. There were significant to very significant differences between the different hybrid progeny families on the tree height in the three forest ages 7.5-year-old, 8.5-year-old and 10-year-old, and significant to very significant differences on the DBH and very significant differences on the individual volume in the two latter forest ages. When the forest age was 10-year-old, each family tree height range was 15. 61-23. 79 m, diameter range was 13. 13-20. 99 cm, individual volume range was 0.108 7-0.402 1 m3. The two families of No.21 and No.5 were elected to fine families, whose inclusion was 9.1%. The 6 paternal types of progeny growth performance were compared, and we initially identified that the progeny families whose female parent was E. urophylla and male parent was E. grandis or E. grandis × E. urophylla had outstanding performance in southern Fujian. Seven superior trees were selected, of which 4 were from No. 21 family, whose individual volume range was 0. 476 1-1. 633 3 m3 , 22.42% -319.98% higher than the clones of E. urophylla × E. grandis-DH32-29, and average real gain in the family was 118.95%. And of which 3 were from No.5 family, whose individual volume range was 0.410 7-0.686 4 m3 , 5.61%-76.50% higher than the clones of E. urophylla × E. grandis-DH32-29, and average real gain in the family was 75.49%.