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Marker-assisted breeding to develop the drought-tolerant version of Sabitri, a popular variety from Nepal

Sabitri is a rice variety grown in a large part of the rainfed areas of Nepal. It was originally developed for irrigated condition; hence, this variety suffers high yield decline under drought. Two QTLs, qDTY 3.2 and qDTY 12.1 , with large effects on grain yield under drought were identified in the...

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Main Authors: Dixit, Shalabh, Yadaw, Ram Baran, Mishra, Krishna Kumar, Kumar, Arvind
Format: Journal Article
Language:Inglés
Published: Springer 2017
Online Access:https://hdl.handle.net/10568/165019
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author Dixit, Shalabh
Yadaw, Ram Baran
Mishra, Krishna Kumar
Kumar, Arvind
author_browse Dixit, Shalabh
Kumar, Arvind
Mishra, Krishna Kumar
Yadaw, Ram Baran
author_facet Dixit, Shalabh
Yadaw, Ram Baran
Mishra, Krishna Kumar
Kumar, Arvind
author_sort Dixit, Shalabh
collection Repository of Agricultural Research Outputs (CGSpace)
description Sabitri is a rice variety grown in a large part of the rainfed areas of Nepal. It was originally developed for irrigated condition; hence, this variety suffers high yield decline under drought. Two QTLs, qDTY 3.2 and qDTY 12.1 , with large effects on grain yield under drought were identified in the Sabitri background in separate QTL mapping studies. The present study reports the development of Sabitri near isogenic lines (NILs) with combinations of these two QTLs and their characterization under drought. To do so, marker-assisted backcross breeding (MABB) was combined with phenotypic selection to develop high-yielding drought-tolerant NILs with Sabitri grain type. Apart from this, drought-tolerant variants for grain type with high yield under non-stress were identified among the developed NILs. Early days to flowering of up to 13 days and reduction in plant height of up to 13 cm as compared to Sabitri were observed in the developed NILs. Some of these NILs showed higher yield compared to Sabitri and relatively higher tolerance to drought, indicating the capture of positive alleles and interactions during the course of selection. The developed NILs possessed high yield potential which make them suitable materials for the testing of water-saving technologies in irrigated areas. Based on their performance, these NILs can be deployed in rainfed areas in Nepal and other countries of South Asia to increase yield stability.
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language Inglés
publishDate 2017
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spelling CGSpace1650192025-02-19T14:27:14Z Marker-assisted breeding to develop the drought-tolerant version of Sabitri, a popular variety from Nepal Dixit, Shalabh Yadaw, Ram Baran Mishra, Krishna Kumar Kumar, Arvind Sabitri is a rice variety grown in a large part of the rainfed areas of Nepal. It was originally developed for irrigated condition; hence, this variety suffers high yield decline under drought. Two QTLs, qDTY 3.2 and qDTY 12.1 , with large effects on grain yield under drought were identified in the Sabitri background in separate QTL mapping studies. The present study reports the development of Sabitri near isogenic lines (NILs) with combinations of these two QTLs and their characterization under drought. To do so, marker-assisted backcross breeding (MABB) was combined with phenotypic selection to develop high-yielding drought-tolerant NILs with Sabitri grain type. Apart from this, drought-tolerant variants for grain type with high yield under non-stress were identified among the developed NILs. Early days to flowering of up to 13 days and reduction in plant height of up to 13 cm as compared to Sabitri were observed in the developed NILs. Some of these NILs showed higher yield compared to Sabitri and relatively higher tolerance to drought, indicating the capture of positive alleles and interactions during the course of selection. The developed NILs possessed high yield potential which make them suitable materials for the testing of water-saving technologies in irrigated areas. Based on their performance, these NILs can be deployed in rainfed areas in Nepal and other countries of South Asia to increase yield stability. 2017-08 2024-12-19T12:54:37Z 2024-12-19T12:54:37Z Journal Article https://hdl.handle.net/10568/165019 en Open Access Springer Dixit, Shalabh; Yadaw, Ram Baran; Mishra, Krishna Kumar and Kumar, Arvind. 2017. Marker-assisted breeding to develop the drought-tolerant version of Sabitri, a popular variety from Nepal. Euphytica, Volume 213, no. 8
spellingShingle Dixit, Shalabh
Yadaw, Ram Baran
Mishra, Krishna Kumar
Kumar, Arvind
Marker-assisted breeding to develop the drought-tolerant version of Sabitri, a popular variety from Nepal
title Marker-assisted breeding to develop the drought-tolerant version of Sabitri, a popular variety from Nepal
title_full Marker-assisted breeding to develop the drought-tolerant version of Sabitri, a popular variety from Nepal
title_fullStr Marker-assisted breeding to develop the drought-tolerant version of Sabitri, a popular variety from Nepal
title_full_unstemmed Marker-assisted breeding to develop the drought-tolerant version of Sabitri, a popular variety from Nepal
title_short Marker-assisted breeding to develop the drought-tolerant version of Sabitri, a popular variety from Nepal
title_sort marker assisted breeding to develop the drought tolerant version of sabitri a popular variety from nepal
url https://hdl.handle.net/10568/165019
work_keys_str_mv AT dixitshalabh markerassistedbreedingtodevelopthedroughttolerantversionofsabitriapopularvarietyfromnepal
AT yadawrambaran markerassistedbreedingtodevelopthedroughttolerantversionofsabitriapopularvarietyfromnepal
AT mishrakrishnakumar markerassistedbreedingtodevelopthedroughttolerantversionofsabitriapopularvarietyfromnepal
AT kumararvind markerassistedbreedingtodevelopthedroughttolerantversionofsabitriapopularvarietyfromnepal

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