黑杨派无性系生长与材性联合选择

Joint Selection for Growth and Wood Properties in Aigeiros Clones

利用 9年生黑杨派 10个无性系试验林材料进行了生长与材性等 14个性状的遗传分析及选择研究。方差分析、遗传参数估测表明 ,无性系间 14个性状差异均达极显著水平 ,各性状无性系重复力在 0 85 2～ 0 987。说明这些无性系在多个性状上存在广泛遗传差异 ,并且这种差异受较强的遗传控制 ,从中进行多性状遗传改良是可行的。经多性状主成分分析和聚类分析 ,选出卡帕茨、5 0杨、I 6 9三个综合性状表现优良的无性系 ,其中卡帕茨为新选无性系 ,在该试验林中生长量最高 ,材积超I 2 14杨 6 9 7%、超中林 4 6杨 7 9% ,且材质优良 。

Fourteen traits of ten clones from Section Aigeiros were studied by genetic analysis and comprehensive selection at nine-year-old. Variance analysis and estimates of genetic parameters demonstrated that the clone effect was significant or highly significant for all traits. Their repeatabilities ranged from 0.852 to 0.987. The result indicated that Aigeiros clones exhibited wide genetic variation in 14 traits studied, and multi-traits complex selection was feasible among them. Principal component analysis and cluster analysis indicated that Populus×euramericana cv. ‘Carppaccio' ,P. deltoides cv.‘55/65' and P. deltoides cv. ‘Lux' were superior clones with fine comprehensive traits. Especially, P.×euramericana cv.‘Carppaccio' was a superior new introduced clone, which was the biggest one in volume among the tested clones. Its volume was 169.7% , 107.9% compared with P.×euramericana cv.‘I-214' ,P.×euramericana ‘Zhonglin46’ respectively.This superior clone with straight and round trunk ,moderate taper and crown, and excellent timber quality was suitabe for popularization.