Positive interactions of major-effect QTLs with genetic background that enhances rice yield under drought

dc.creatorSandhu, N.
dc.creatorDixit, S.
dc.creatorMallikarjuna Swamy, B.P.
dc.creatorVikram, P.
dc.creatorVenkateshwarlu, C.
dc.creatorCatolos, M.
dc.creatorArvind Kumar
dc.date2021-01-12T01:10:15Z
dc.date2021-01-12T01:10:15Z
dc.date2018
dc.date.accessioned2023-07-17T20:06:36Z
dc.date.available2023-07-17T20:06:36Z
dc.identifierhttps://hdl.handle.net/10883/21091
dc.identifier10.1038/s41598-018-20116-7
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/7512877
dc.descriptionTo improve the grain yield of the lowland-adapted popular rice variety Samba Mahsuri under reproductive-stage drought (RS) and to understand the interactions between drought QTLs, two mapping populations were developed using marker-assisted selection (MAS) and marker-assisted recurrent selection (MARS). The mean grain yield of pyramided lines (PLs) with q DTY 2.2 + q DTY 4.1 in MAS is significantly higher under RS and irrigated control than lines with single QTLs. Among MARS PLs, lines with four qDTYs (qDTY 1.1 + qDTY 2.1 + qDTY 3.1 + qDTY 11.1 ) and two QTLs (qDTY 1.1 + qDTY 11.1 ) yielded higher than PLs with other qDTY combinations. The selected PLs showed a yield advantage of 0.3-2.0 t ha-1 under RS. An allelic profile of MAS PLs having same qDTY combination but with different yields under drought was studied. Hierarchical clustering grouped together the selected lines with high yield under drought. Epistasis test showed the interaction of qDTY 4.1 and qDTY 9.1 loci with qDTY 7.1 significantly increased yield under drought and all the lines with higher yield under drought possessed the conserved region of qDTY 7.1 on chromosome 7. The positive interactions among QTLs, effectiveness of QTLs in different backgrounds, introgression of DTY QTLs together with resistance to biotic stresses shall help enhance grain yield under RS.
dc.languageEnglish
dc.publisherNature Publishing Group
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.source1
dc.source8
dc.source2045-2322
dc.sourceNature Scientific Reports
dc.source1626
dc.subjectAGRICULTURAL SCIENCES AND BIOTECHNOLOGY
dc.subjectQUANTITATIVE TRAIT LOCI
dc.subjectPLANT GENETICS
dc.subjectRICE
dc.subjectDROUGHT
dc.subjectMARKER-ASSISTED SELECTION
dc.titlePositive interactions of major-effect QTLs with genetic background that enhances rice yield under drought
dc.typeArticle
dc.typePublished Version
dc.coverageLondon (United Kingdom)


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