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在印度旁遮普的霍希亚布尔地区,随机分组设计细叶桉各种生长参数,评价18个基因型株系在3年中的生长情况,比较了无性系种子园和未知种源的种子长成的植株。结果表明,各株系株高、胸径和主干高均存在显著差异。株高和主干高度的广义遗传力处于中、低水平。株高和主干高的遗传增益随树龄的增加而增加。株高3年平均遗传增益值最大(159.60%),胸径次之(110.97%),主干高度的平均遗传增益值最低(70.34%)。第2,3年时,与其他株系比较,株系17的胸径最大,株系14和5次之。随树龄的增加,株系5胸径呈增加趋势,主干高最优。第2,3年时,株系11的胸径值在18个株系中从第9位分别升高到8位和第3位,主干高也从第9位升高到第4和第2位。株系6和10各项参数值均最差。株系17,14和5最适合商业化种植。
In the Houjyabul district of Punjab, India, various growth parameters of Eucalyptus urophylla were randomly assigned to evaluate the growth of 18 genotypes in three years. The seed growth of clonal seed orchards and unknown provenances were compared Of the plant. The results showed that there were significant differences in plant height, DBH and trunk height among all the strains. The broad heritability of plant height and trunk height is at medium and low levels. The genetic gain of plant height and trunk height increased with the increase of tree age. The average genetic gain of plant height in three years was the highest (159.60%), followed by the diameter of the chest (110.97%), and the lowest was the average genetic gain of trunk height (70.34%). At the second and third years, strain 17 had the highest DBH at strains 14 and 5 compared with other strains. With the increase of tree age, the DBH of 5 strains showed an increasing tendency, and the trunk height was the best. At the second and third years, the DBH of strain 11 increased from 9th position to 8th position and 3th position in 18 lines, while the trunk height increased from 9th position to 4th and 2nd position . Strain 6 and 10 of the parameters of the worst values. Strain 17, 14 and 5 are most suitable for commercial cultivation.