Variation of Growth and Genetics Parameters of

The use of Acacia auriculiformis for timber is currently promising. Thus, there is a need for superior plants with good growth characteristics. Tree improvement has a part in framing these genetically good traits. This can be attempted through progeny trials. The breeding of A. auriculiformis in Indonesia has entered the second-generation phase, one of which progeny test is in Gunungkidul District, Special Region of Yogyakarta Province, Indonesia. Evaluation is required to provide information on the growth variation of this progeny trial. Analysis of variance (ANOVA) was computed to attain components of variances to be used in calculating heritability and correlations between traits. The result showed that the family effect significantly affected the observed traits, including diameter and stem form (p<0,01). Individual heritability and family heritability for both traits were medium to high. Genetic correlation showed a weak positive relationship of 0.16. This value suggests that family selection would be effective if diameter is used as a criterion.