Combining drought and submergence tolerance in rice: marker-assisted breeding and QTL combination effects

dc.creatorDixit, S.
dc.creatorSingh, A.
dc.creatorSandhu, N.
dc.creatorBhandari, A.
dc.creatorVikram, P.
dc.creatorArvind Kumar
dc.date2021-12-07T01:10:21Z
dc.date2021-12-07T01:10:21Z
dc.date2017
dc.date.accessioned2023-07-17T20:08:21Z
dc.date.available2023-07-17T20:08:21Z
dc.identifierhttps://hdl.handle.net/10883/21758
dc.identifier10.1007/s11032-017-0737-2
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/7513527
dc.descriptionTDK1 is a popular rice variety from the Lao PDR. Originally developed for irrigated conditions, this variety suffers a high decline in yield under drought conditions. Studies have identified three quantitative trait loci (QTLs) for grain yield under drought conditions, qDTY3.1, qDTY6.1, and qDTY6.2, that show a high effect in the background of this variety. We report here the pyramiding of these three QTLs with SUB1 that provides 2–3 weeks of tolerance to complete submergence, with the aim to develop drought- and submergence-tolerant near-isogenic lines (NILs) of TDK1. We used a tandem approach that combined marker-assisted backcross breeding with phenotypic selection to develop NILs with high yield under drought stress and non-stress conditions and preferred grain quality. The effect of different QTL combinations on yield and yield-related traits under drought stress and non-stress conditions is also reported. Our results show qDTY3.1 to be the largest and most consistent QTL affecting yield under drought conditions, followed by qDTY6.1 and qDTY6.2, respectively. QTL class analysis also showed that lines with a combination of qDTY3.1 and qDTY6.1 consistently showed a higher tolerance to drought than those in which one of these QTLs was missing. In countries such as Lao PDR, where large areas under rice cultivation suffer vegetative-stage submergence and reproductive-stage drought, these lines could ensure yield stability. These lines can also serve as valuable genetic material to be used for further breeding of high-yielding, drought- and submergence-tolerant varieties in local breeding programs.
dc.languageEnglish
dc.publisherSpringer
dc.rightsCIMMYT manages Intellectual Assets as International Public Goods. The user is free to download, print, store and share this work. In case you want to translate or create any other derivative work and share or distribute such translation/derivative work, please contact CIMMYT-Knowledge-Center@cgiar.org indicating the work you want to use and the kind of use you intend; CIMMYT will contact you with the suitable license for that purpose
dc.rightsOpen Access
dc.source12
dc.source37
dc.source1380-3743
dc.sourceMolecular Breeding
dc.source143
dc.subjectAGRICULTURAL SCIENCES AND BIOTECHNOLOGY
dc.subjectSubmergence
dc.subjectMarker Assisted Backcross Breeding
dc.subjectRICE
dc.subjectDROUGHT
dc.subjectYIELDS
dc.subjectWATER TOLERANCE
dc.subjectQUANTITATIVE TRAIT LOCI
dc.subjectPLANT BREEDING
dc.titleCombining drought and submergence tolerance in rice: marker-assisted breeding and QTL combination effects
dc.typeArticle
dc.typePublished Version
dc.coverageDordrecht (Netherlands)


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