Genotypic variation on clones of acacia hybrid at Yen The clonal test
Keywords:
Acacia hybrid, Fakopp, modulus of elasticit, , repeatability,, wood densityAbstract
Genotypic variation and clonal repeatabilities in growth, stem quality,
wood density and dynamic modulus of elasticity (MoEd) of acacia hybrid
were estimated in 138 newly sellected clones and 12 control clones (6
commercial clones, 3 bulked seedlots of Acacia mangium and 3 bulked
seedlots of Acacia auriculiformis) at age 3 years in a clonal trial at Yen
The, Bac Giang. The results showed that there were significant differences
(Fpr. < 0.001) in growth, wood density and MoEd between clones. The
clonal repeatability of growth traits were moderate (H2= 0.36 - 0.39) and
coefficients of genotypic variation were high (CVG= 10.1 - 13.1%). The
clonal repeatability of MoE d were lower than that for wood density, 0.20
and 0.47, respectively. The coefficients of genotypic varation of wood
density and MoE d were moderate (7.4 - 7.7%). Phenotypic correlations
between growth traits and wood properties were weak and nonsignificantly (-0,054 to 0,105). These correlations suggest that improvement of the growth traits of acacia hybrid could not a ffect on wood properties. The correlation between wood density and MoEd were moderate (r = 0,41) showed that selection of wood density could influence positively on MoE d of this species.
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