Abstract:

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.

Key words: Aigeiros, clone, genetic analysis, joint selection