QTL mapping under salt stress in rice using a Kalarata–Azucena population

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dc.creatorde Ocampo, Marjorie P.
dc.creatorHo, Viet The
dc.creatorThomson, Michael J.
dc.creatorMitsuya, Shiro
dc.creatorYamauchi, Akira
dc.creatorIsmail, Abdelbagi M.
dc.date2022-06
dc.date2024-12-19T12:53:24Z
dc.date2024-12-19T12:53:24Z
dc.date.accessioned2026-06-27T04:08:57Z
dc.descriptionSalt stress is a major constraint across large rice production areas in Asia, because of the high sensitivity of modern rice varieties. To identify quantitative trait loci (QTL) associated with salt tolerance in rice, we developed an F2 population from a cross between the salt-tolerant landrace, Kalarata, and the salt-sensitive parent, Azucena. F3 families from this population were screened and scored for salt tolerance using IRRI’s Standard evaluation system (SES). Growth, biomass, Na+ and K+ concentrations in leaf tissues, and chlorophyll concentration were determined. A genetic linkage map was constructed with 151 SSRs and InDel markers, which cover 1463 cM with an average distance of 9.69 cM between loci. A total of 13 QTL were identified using Composite Interval Mapping for 16 traits. Several novel QTL were identified in this study, the largest is for root sodium concentration (LOD = 11.0, R2 = 25.0) on chromosome 3, which also co-localize with a QTL for SES. Several QTL on the short arm of chromosome 1 coincide with the Saltol locus identified before. The novel QTL identified in this study constitute future targets for molecular breeding, to combine them with other QTL identified before, for higher tolerance and stable performance of rice varieties in salt affected soils.
dc.identifierhttps://hdl.handle.net/10568/164068
dc.identifier.urihttp://hdl.handle.net/123456789/23133
dc.languageen
dc.publisherSpringer
dc.rightsOpen Access
dc.sourcede Ocampo, Marjorie P.; Ho, Viet The; Thomson, Michael J.; Mitsuya, Shiro; Yamauchi, Akira and Ismail, Abdelbagi M. 2022. QTL mapping under salt stress in rice using a Kalarata–Azucena population. Euphytica, Volume 218, no. 6
dc.subjecthorticulture
dc.subjectplant science
dc.subjectgenetics
dc.subjectagronomy and crop science
dc.titleQTL mapping under salt stress in rice using a Kalarata–Azucena population
dc.typeJournal Article

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Instituto Internacional de Investigación del Arroz (IRRI)