Meta-analysis of quantitative trait loci for grain yield and component traits under reproductive-stage drought stress in an upland rice population

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dc.creatorTrijatmiko, Kurniawan R.
dc.creatorSupriyanta
dc.creatorPrasetiyono, Joko
dc.creatorThomson, Michael J.
dc.creatorVera Cruz, Casiana M.
dc.creatorMoeljopawiro, Sugiono
dc.creatorPereira, Andy
dc.date2014-08
dc.date2024-12-19T12:55:09Z
dc.date2024-12-19T12:55:09Z
dc.date.accessioned2026-06-27T04:08:43Z
dc.descriptionA recombinant inbred population developed from a cross between high-yielding lowland rice (Oryza sativa L.) subspecies indica cv. IR64 and upland tropical rice subspecies japonica cv. Cabacu was used to identify quantitative trait loci (QTLs) for grain yield (GY) and component traits under reproductive-stage drought stress. One hundred fifty-four lines were grown in field trials in Indonesia under aerobic conditions by giving surface irrigation to field capacity every 4 days. Water stress was imposed for a period of 15 days during pre-flowering by withholding irrigation at 65 days after seeding. Leaf rolling was scored at the end of the stress period and eight agronomic traits were evaluated after recovery. The population was also evaluated for root pulling force, and a total of 201 single nucleotide polymorphism markers were used to construct the molecular genetic linkage map and QTL mapping. A QTL for GY under drought stress was identified in a region close to the sd1 locus on chromosome 1. QTL meta-analysis across diverse populations showed that this QTL was conserved across genetic backgrounds and co-localized with QTLs for leaf rolling and osmotic adjustment (OA). A QTL for percent seed set and grains per panicle under drought stress was identified on chromosome 8 in the same region as a QTL for OA previously identified in three different populations.
dc.identifierhttps://hdl.handle.net/10568/165510
dc.identifier.urihttp://hdl.handle.net/123456789/22996
dc.languageen
dc.publisherSpringer
dc.rightsOpen Access
dc.sourceTrijatmiko, Kurniawan R.; Supriyanta; Prasetiyono, Joko; Thomson, Michael J.; Vera Cruz, Casiana M.; Moeljopawiro, Sugiono and Pereira, Andy. 2014. Meta-analysis of quantitative trait loci for grain yield and component traits under reproductive-stage drought stress in an upland rice population. Mol Breeding, Volume 34 no. 2 p. 283-295
dc.subjectaerobiosis
dc.subjectdrought stress
dc.subjectirrigation
dc.subjectleaf rolling
dc.subjectlowland
dc.subjectquantitative trait loci
dc.subjectrecombinant inbred lines
dc.subjectseeding
dc.subjectupland
dc.titleMeta-analysis of quantitative trait loci for grain yield and component traits under reproductive-stage drought stress in an upland rice population
dc.typeJournal Article

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Instituto Internacional de Investigación del Arroz (IRRI)