Selection of fast growing Acacia auriculiformis for planting in the Southeast Vietnam
Keywords:
Acacia auriculiformis,, broad-sense heritability, clone, , genetic gain,, growthAbstract
The objective of the study was to select Acacia auriculiformis clones of fast growing and good stem form for timber production in the Southeast. The study was implemented in a clonal trial at Bau Bang district, Binh Duong province. The trial include 30 newly selected clones and 5 approved clones used as controls. Result of evaluation at 36 months old showed significant difference between clones in all growth and stem quality traits. Growth traits had higher broad-sense heritability (H 2 = 0.24 - 0.26) and coefficient of genetic variation (CVG = 5.5 - 18.2%) compared to those values of stem qualities (H 2 = 0.12 - 0.15; CVG = 3.5 - 4.3). Genotypic correlation between growth and stem quality traits were low and non-significant (Rg = 0.06 - 0.14). Predicted genetic gain of growth traits ranged between 7.1 and 24.7%. Based on evaluation results, 3 clones LT35, LT70 and LT74 with mean annual increment ranged from 26.6 to 27.1 m 3 /ha/year which is 37.2% higher than trial mean and also have good stem straightness and branch size for timber production
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