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

To 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 (MA...

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Autores principales: Sandhu, Nitika, Dixit, Shalabh, Swamy, B. P. Mallikarjuna, Vikram, Prashant, Venkateshwarlu, Challa, Catolos, Margaret, Kumar, Arvind
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5786057/
https://www.ncbi.nlm.nih.gov/pubmed/29374240
http://dx.doi.org/10.1038/s41598-018-20116-7
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author Sandhu, Nitika
Dixit, Shalabh
Swamy, B. P. Mallikarjuna
Vikram, Prashant
Venkateshwarlu, Challa
Catolos, Margaret
Kumar, Arvind
author_facet Sandhu, Nitika
Dixit, Shalabh
Swamy, B. P. Mallikarjuna
Vikram, Prashant
Venkateshwarlu, Challa
Catolos, Margaret
Kumar, Arvind
author_sort Sandhu, Nitika
collection PubMed
description To 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 qDTY(2.2) + qDTY(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.
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spelling pubmed-57860572018-02-07 Positive interactions of major-effect QTLs with genetic background that enhances rice yield under drought Sandhu, Nitika Dixit, Shalabh Swamy, B. P. Mallikarjuna Vikram, Prashant Venkateshwarlu, Challa Catolos, Margaret Kumar, Arvind Sci Rep Article To 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 qDTY(2.2) + qDTY(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. Nature Publishing Group UK 2018-01-26 /pmc/articles/PMC5786057/ /pubmed/29374240 http://dx.doi.org/10.1038/s41598-018-20116-7 Text en © The Author(s) 2018 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Sandhu, Nitika
Dixit, Shalabh
Swamy, B. P. Mallikarjuna
Vikram, Prashant
Venkateshwarlu, Challa
Catolos, Margaret
Kumar, Arvind
Positive interactions of major-effect QTLs with genetic background that enhances rice yield under drought
title Positive interactions of major-effect QTLs with genetic background that enhances rice yield under drought
title_full Positive interactions of major-effect QTLs with genetic background that enhances rice yield under drought
title_fullStr Positive interactions of major-effect QTLs with genetic background that enhances rice yield under drought
title_full_unstemmed Positive interactions of major-effect QTLs with genetic background that enhances rice yield under drought
title_short Positive interactions of major-effect QTLs with genetic background that enhances rice yield under drought
title_sort positive interactions of major-effect qtls with genetic background that enhances rice yield under drought
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5786057/
https://www.ncbi.nlm.nih.gov/pubmed/29374240
http://dx.doi.org/10.1038/s41598-018-20116-7
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