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对6年生降香黄檀13个家系试验林胸径、树高和枝下高等3个主要生长性状进行遗传变异研究。结果表明:试验林胸径、树高、枝下高平均值分别为6.02 cm、4.91 m、1.27 m,各家系间枝下高差异极显著,胸径差异显著,而树高差异不显著。枝下高的变异系数最大(49.61%),其次为胸径(30.90%),树高最小(28.72%)。枝下高(重复力为0.59)、胸径(0.52)遗传较稳定,树高(0.15)遗传稳定性差。以胸径、树高和枝下高优良表现株数统计为依据,家系21、90各性状表现最优。
The genetic variation of three major growth traits of 6-year-old Dalbergia spp., Including 13 DBHs, DBH and tree height, were studied. The results showed that the mean values of DBH, tree height and branch height were 6.02 cm, 4.91 m and 1.27 m, respectively. There were significant differences in height between branches, with significant difference in DBH but not significant in tree height. The coefficient of variation of branch height was the highest (49.61%), followed by the diameter at breast height (30.90%) and the lowest tree height (28.72%). Branch height (repeatability of 0.59), DBH (0.52) more stable genetic, tree height (0.15) poor genetic stability. Based on the statistics of DBH, tree height and branch height, the characters of families 21 and 90 showed the best performance.