Call Prefix : PR-T

Call Suffix : 2024

Call Cutter : D - PlBr 13

Location : SEARCA Library

Format : Printed

Publisher : Institut Pertanian Bogor

Publication Date : 2024

Publication Place : Indonesia

Summary : As the backbone of the Indonesian economy, the oil palm industry had a major issue with basal stem rot disease caused by Ganoderma boninense. Since Ganoderma is a pathogen that could attack oil palms very fast and is deadly, and effective disease control is unavailable, breeding oil palms for Ganoderma resistance is necessary. Besides the long oil palm breeding cycle, other obstacles include determining the germplasm resistance level, developing effective nursery and field screening methods, and understanding the heritability of resistance. To answer those problems, this study aims to (1) understand the heritability of oil palm resistance towards Ganoderma boninense to breed resistant oil palm; (2) obtain oil palm seedling vegetative performance under Ganoderma inoculation; (3) produce oil palm progenies resistant towards Ganoderma via crossing between selected dura and pisifera/tenera; and (4) develop potential metabolite and molecular biomarker to differentiate resistant and susceptible oil palm against basal stem rot. This study showed that the heritability of oil palm resistance, mainly from the disease severity index variable, is high up to 0,39 in the dura female grandparent. This indicates the importance of selecting resistant dura female parental palms to breed the Ganoderma resistant oil palm variety. Parental dura resistance levels from commercial DxP nursery screening of previous studies have been validated through new progenies from the mating design of this study. The vegetative performance of oil palm seedlings inoculated by Ganoderma was not significantly different from the negative control, except for the leaves number in the moderate DxP population. This could be due to the Ganoderma symptoms first being observed by the oldest leaves, which were yellowing and eventually drying. More studies are needed for the Laccase-24 molecular marker to be able to differentiate resistant and susceptible DxP populations against Ganoderma. However, this study produces candidate metabolite biomarkers in glycerol and ascorbic acid that could differentiate oil palm resistance levels against Ganoderma. Hopefully, with the information on the resistance heritability, vegetative performance, resistant progenies candidate, and potential metabolite biomarkers of this study, the oil palm breeding for Ganoderma resistance could be conducted more effectively and efficiently.