According to genetic analysis on 6 traits of 4-year-old Casuarina glauca in provenance trial which established in Lin'gao County, Hainan Province, there were significantly differences among height (H), diameter at breast height (DBH), individual volume (VOL), stem straightness(SS) and survival percentage (SP) (pppC. glauca provenances. The genetic correlation among the three growth characteristics, H, DBH and VOL was highly significant, but not among quality traits, SA, SS and SP, which showed that the three quality traits were independent from each other. In another aspect, the coefficient of variation varied from 31.5% (survival percentage) to 91.8% (height). Additionally, the mean genetic gains in the five traits were 2.1%, 1.4%, 2.2%, 0.2%, 0.2% and 6.2% respectively. By means of Smith-Hazel Index Selection and 20% selective ratio, five seedlots, G03, G02, G19, G07 and G25 were screened out as superior provenances for further tree breeding research.

以海南2个试验点上各含17个无性系的短枝木麻黄无性系为试验材料，进行树高、胸径、单株材积、主干分叉习性、主干通直度和保存率等6个性状的方差分析，并估算出6个性状的遗传相关和遗传力及指数选择等遗传参数。结果表明：无性系和地点的交互作用除了主干分叉习性有显著差异（pp<0.001）。当不考虑无性系和地点互作时，无性系间不同性状的重复力均较高，为0.35~0.85，其中，树高重复力最高，主干分叉习性最低。遗传相关分析结果表明：树高、胸径、单株材积和保存率之间的表型及遗传存在极显著的正相关。树高、胸径、单株材积、主干分叉习性、主干通直度和保存率的平均遗传增益分别为6.5%、4.8%、10.9%、3.7%、1.5%和8.1%，筛选可获得明显的遗传增益。通过Smith-Hazel指数选择并按20%的入选率，选育出编号17、21和20三个优良无性系。