Estimation of genetic parameter for growth of one year old Swietenia macrophylla King. progeny trial in Trenggalek, East Java

Abstract

Abstract After being introduced to Indonesia, Swietenia macrophylla King. has since been widely planted for community and plantation forests in several locations. This study was carried out to ascertain the growth variation, heritability, and genetic correlation of the 1-year-old S. macrophylla progeny trial in Trenggalek, East Java. This progeny trial was designed of incomplete block design (IBD), and the plant materials are 50 families from Banjar-Ciamis, Samigaluh-Kulonprogo, Dlingo-Bantul, Bondowoso-East Java, and Lombok-West Nusa Tenggara. Three individuals were planted in line tree plot for each family, repeated 6 times with a spacing of 4m x 2m. According to the findings, the Bondowoso land race had the best growth with a height and stem diameter of 0.81 m and 1.12 cm, respectively. Families’ varying heights were divided into 14 groups, and the stem diameter was divided into 13 groups. The stem diameter has individual and family heritabilities of 0.23 (moderate) and 0.53 (moderate), respectively, whereas the height’s individual and family heritabilities are 0.39 (high) and 0.65 (high), respectively. Height and stem diameter showed a positive and strong of genetic correlation (0.90).