Genetic Analysis and Selection of Eucalyptus Hybrids for Growth and Typhoon Resistance
Thirty eucalypt hybrid families were assessed at age 27 months for growth and typhoon resistance in order to select superior families and individuals within families for further breeding.There were highly significant differences (P＜0.01) between families,and the interaction of families with replicate was also significant,for the traits of tree height (H),diameter at breast height (D),volume of wood (V) and typhoon resistance (WR).For families,H,D,V and WR and for individuals,H,D,and V were under strong genetic control;that for WR was relatively weak among individuals within families.Highly significant,positive genetic correlations(P＜0.01) were found between each pair of H,D,V and WR.For growth traits,the strongest correlation was between D and V.For typhoon resistance,the strongest correlation found was between WR and D.According to a comprehensive evaluation of families and individuals,8 superior families and 39 superior individuals were selected.For these 8 superior families,the average genetic gains in four characters were 8.2％,10.0％,25.2％ and 10.0％ respectively;and for the 39 superior individuals,the average genetic gains were 22.6％,13.5％,105.5％ and 1.9％ respectively.
Eucalyptushybridgrowth traitstyphoon resistance indexgenetic analysisselection of families
NETL
NSTL
万方数据
维普
