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Lookup NU author(s): Dr Cahyo Wibowo, Professor Heather Cordell, Professor Angharad MR GatehouseORCiD, Dr Martin EdwardsORCiD
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND).
© 2023 The Authors. Plant Pathology published by John Wiley & Sons Ltd on behalf of British Society for Plant Pathology. Leaf spot is considered as a common disease of oil palm, caused primarily by Curvularia spp. fungi. This disease mainly affects the early stages of oil palm and if not adequately controlled can cause plant death. Among the methods available to control the disease, breeding resistant varieties is the most economically effective and promising strategy. A genome-wide association study for leaf spot resistance was conducted on 210 individual tenera palms from seven different (origin) crosses. These palms were subsequently infected with Curvularia spp. pathogenic inoculum in a nursery trial located in an endemic area. The area under the disease progress curve was used as a phenotypic measure. In addition, a genotyping-by-sequencing (GBS) approach was used to obtain the genotyping data of each individual. We found two loci, at chromosome 2 and chromosome 13, that were significantly associated with leaf spot disease resistance. Six genetic variants at the two loci (five variants at chromosome 2 and one variant at chromosome 13) surpassed the threshold for genome-wide significance (p < 106). These loci are linked with three widely known disease-related genes, namely, resistance gene analogue 3 (RGA3), resistance gene analogue 4 (RGA4) and receptor-like protein 9a (RLP9a). The loci identified here can be used for marker-assisted selection when developing leaf spot disease-resistant oil palm varieties.
Author(s): Wibowo CS, Apriyanto A, Ernawan R, Neing D, Susilo R, Cordell HJ, Gatehouse AMR, Edwards MG
Publication type: Article
Publication status: Published
Journal: Plant Pathology
Year: 2023
Volume: 72
Issue: 9
Pages: 1626-1636
Online publication date: 17/07/2023
Acceptance date: 24/06/2023
Date deposited: 09/08/2023
ISSN (print): 0032-0862
ISSN (electronic): 1365-3059
Publisher: John Wiley and Sons Inc.
URL: https://doi.org/10.1111/ppa.13774
DOI: 10.1111/ppa.13774
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