Genetic diversity of introduced species Acacia auriculiformis observed in second generation progeny trial in Gunungkidul, Yogyakarta

Abstract

Handayani BR, Kartikaningtyas D, Setyaji T, Sunarti S, Nirsatmanto A. 2018. Genetic diversity of introduced species Acacia auriculiformis observed in second generation progeny trial in Gunungkidul, Yogyakarta. Pros Sem Nas Masy Biodiv Indon 4: 47-51. Introduction of genetic materials or species from other places is one of the ways for increasing the genetic diversity in tree breeding program. Breeding of Acacia species, especially Acacia auriculiformis has been done up to the second generation breeding cycles using introduced species from Papua New Guinea (PNG) and Queensland, Australia (QLD). The purpose of this study is to investigate the genetic diversity of introduced species A. auriculiformis in second generation progeny trial plot. The progeny trial plot was established in Gunungkidul, Yogyakarta with a complete randomized block design, 30 families, 33 replicates, 4 trees per plot with a spacing of 3 x 1.5 meters. Growth characteristic measurement was conducted for 3960 trees in total at 18 months age after planting with variable of height, diameter at breast height (dbh) and stem form. The results showed that the introduced species A. auriculiformis in second generation progeny trial had a survival rate of 91.45% with high genetic diversity on all observed growth characteristic. The proportion of genetic variation to the total phenotypic variation ranged from 3.48-7.73%, with individual heritability values ranged from 0.14-0.31 and family heritability of 0.76-0.84. Within family selection and family selection resulted in total genetic gain of height, dbh and stem form traits ranging from 4-7%.