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ORIGINAL RESEARCH article
Front. Plant Sci.
Sec. Plant Abiotic Stress
Volume 15 - 2024 |
doi: 10.3389/fpls.2024.1495241
This article is part of the Research Topic Abiotic Stress Combination: Improving Resilience to Develop Climate-Smart Crops View all articles
Mapping Genomic Regions for Reproductive Stage Drought Tolerance in Rice from Exotic Landrace-Derived Population
Provisionally accepted
Challa Venkateshwarlu
1,2
Paresh Kole
2
Arun Kumar Singh
1*
Pronob J Paul
1*
Pallavi Sinha
1
Vikas Kumar Singh
1*
Arvind Kumar
1,3*- 1 International Rice Research Institute (IRRI), South Asia Hub, ICRISAT Campus, Patancheru, Hyderabad, Telangana,, India
- 2 Visva-Bharati University, Santiniketan, West Bengal, India
- 3 Delta Agrigenetic, Hyderabad, India
In the rapid climate change scenario and subsequent rainfall patterns, drought emerges as a bottleneck for crop production across crops, especially in rainfed rice. Drought significantly impacts the development and production of most modern rice cultivars. Thus, recent breeding efforts aim to integrate drought tolerance traits in existing rice varieties through conventional and molecular approaches. The Identification of grain yield quantitative trait loci (QTLs) under drought, an important trait with high selection efficiency, may lead to the development of drought-tolerant rice varieties. The study reported the grain yield QTLs identified under the reproductive stage drought stress in the F2-derived mapping population from Kasturi (droughtsensitive) × Chao Khaw (drought tolerant). Thirteen QTLs (qDTYs) were identified based on two years of field data. Comparative analysis revealed two robust and consistent DTY QTLs, i.e., qDTY1.1 and qDTY8.1, which explained PVEs of 11.61 to 12.88 % and 15.79 to 18.77 %, respectively. However, qDTY1.1 was found at the nearest position as the previously identified qDTYs. Through candidate gene analysis, the identified QTL regions in chromosome 1 (qDTY1.1) and chromosome 8 (qDTY8.1) revealed 7 and 5 candidate genes based on gene ontology, significantly associated with rice's grain yield-related drought traits. In conclusion, this study identified key stable drought yield QTLs using a drought-tolerant exotic landrace.The identified QTLs provide valuable insights and resources for ongoing efforts to develop drought-tolerant rice varieties. They can be further utilized in drought breeding programs to enhance the drought resilience of existing varieties or to develop new ones.
Keywords: Reproductive stage drought, QTL mapping, linkage, grain yield, rice
Received: 12 Sep 2024; Accepted: 04 Dec 2024.
Copyright: © 2024 Venkateshwarlu, Kole, Singh, Paul, Sinha, Singh and Kumar. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence:
Arun Kumar Singh, International Rice Research Institute (IRRI), South Asia Hub, ICRISAT Campus, Patancheru, Hyderabad, Telangana,, India
Pronob J Paul, International Rice Research Institute (IRRI), South Asia Hub, ICRISAT Campus, Patancheru, Hyderabad, Telangana,, India
Vikas Kumar Singh, International Rice Research Institute (IRRI), South Asia Hub, ICRISAT Campus, Patancheru, Hyderabad, Telangana,, India
Arvind Kumar, Delta Agrigenetic, Hyderabad, India
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