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Limbalkar OM, Vasisth P, Singh G, Jain P, Sharma M, Singh R, Dhanasekaran G, Kumar M, Meena ML, Iquebal MA, Jaiswal S, Rao M, Watts A, Bhattacharya R, Singh KH, Kumar D, Singh N. Dissection of QTLs conferring drought tolerance in B. carinata derived B. juncea introgression lines. BMC PLANT BIOLOGY 2023; 23:664. [PMID: 38129793 PMCID: PMC10740311 DOI: 10.1186/s12870-023-04614-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2023] [Accepted: 11/16/2023] [Indexed: 12/23/2023]
Abstract
BACKGROUND Drought is one of the important abiotic stresses that can significantly reduce crop yields. In India, about 24% of Brassica juncea (Indian mustard) cultivation is taken up under rainfed conditions, leading to low yields due to moisture deficit stress. Hence, there is an urgent need to improve the productivity of mustard under drought conditions. In the present study, a set of 87 B. carinata-derived B. juncea introgression lines (ILs) was developed with the goal of creating drought-tolerant genotypes. METHOD The experiment followed the augmented randomized complete block design with four blocks and three checks. ILs were evaluated for seed yield and its contributing traits under both rainfed and irrigated conditions in three different environments created by manipulating locations and years. To identify novel genes and alleles imparting drought tolerance, Quantitative Trait Loci (QTL) analysis was carried out. Genotyping-by-Sequencing (GBS) approach was used to construct the linkage map. RESULTS The linkage map consisted of 5,165 SNP markers distributed across 18 chromosomes and spanning a distance of 1,671.87 cM. On average, there was a 3.09 cM gap between adjoining markers. A total of 29 additive QTLs were identified for drought tolerance; among these, 17 (58.6% of total QTLs detected) were contributed by B. carinata (BC 4), suggesting a greater contribution of B. carinata towards improving drought tolerance in the ILs. Out of 17 QTLs, 11 (64.7%) were located on the B genome, indicating more introgression segments on the B genome of B. juncea. Eight QTL hotspots, containing two or more QTLs, governing seed yield contributing traits, water use efficiency, and drought tolerance under moisture deficit stress conditions were identified. Seventeen candidate genes related to biotic and abiotic stresses, viz., SOS2, SOS2 like, NPR1, FAE1-KCS, HOT5, DNAJA1, NIA1, BRI1, RF21, ycf2, WRKY33, PAL, SAMS2, orf147, MAPK3, WRR1 and SUS, were reported in the genomic regions of identified QTLs. CONCLUSIONS The significance of B. carinata in improving drought tolerance and WUE by introducing genomic segments in Indian mustard is well demonstrated. The findings also provide valuable insights into the genetic basis of drought tolerance in mustard and pave the way for the development of drought-tolerant varieties.
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Affiliation(s)
- Omkar Maharudra Limbalkar
- Division of Genetics, Indian Council of Agricultural Research (ICAR)-Indian Agricultural Research Institute, New Delhi, India
- Present Address: ICAR-Indian Institute of Agricultural Biotechnology, Ranchi, Jharkhand, India
| | - Prashant Vasisth
- Division of Genetics, Indian Council of Agricultural Research (ICAR)-Indian Agricultural Research Institute, New Delhi, India
| | - Guman Singh
- ICAR-Directorate of Rapeseed-Mustard Research, Sewar, Bharatpur, Rajasthan, India
| | - Priyanka Jain
- Division of Agricultural Bioinformatics, ICAR-Indian Agricultural Statistics Research Institute, New Delhi, India
- Present Address: AIMMSCR, Amity University Uttar Pradesh, Sector 125, Noida, Uttar Pradesh, 201313, India
| | - Mohit Sharma
- Division of Genetics, Indian Council of Agricultural Research (ICAR)-Indian Agricultural Research Institute, New Delhi, India
| | - Rajendra Singh
- Division of Genetics, Indian Council of Agricultural Research (ICAR)-Indian Agricultural Research Institute, New Delhi, India
| | - Gokulan Dhanasekaran
- Division of Genetics, Indian Council of Agricultural Research (ICAR)-Indian Agricultural Research Institute, New Delhi, India
| | - Manish Kumar
- Division of Genetics, Indian Council of Agricultural Research (ICAR)-Indian Agricultural Research Institute, New Delhi, India
- Present Address: College of Agriculture, Navgaon, Alwar, Sri Karan Narendra Agriculture University, Jobner, Rajasthan, India
| | - Mohan Lal Meena
- Division of Genetics, Indian Council of Agricultural Research (ICAR)-Indian Agricultural Research Institute, New Delhi, India
| | - Mir Asif Iquebal
- Division of Agricultural Bioinformatics, ICAR-Indian Agricultural Statistics Research Institute, New Delhi, India
| | - Sarika Jaiswal
- Division of Agricultural Bioinformatics, ICAR-Indian Agricultural Statistics Research Institute, New Delhi, India
| | - Mahesh Rao
- ICAR-National Institute for Plant Biotechnology, New Delhi, India
| | - Anshul Watts
- ICAR-National Institute for Plant Biotechnology, New Delhi, India
| | | | - Kunwar Harendra Singh
- ICAR-Directorate of Rapeseed-Mustard Research, Sewar, Bharatpur, Rajasthan, India
- Present Address: ICAR, Indian Institute of Soybean Research, Indore, Madhya Pradesh, India
| | - Dinesh Kumar
- Division of Agricultural Bioinformatics, ICAR-Indian Agricultural Statistics Research Institute, New Delhi, India
| | - Naveen Singh
- Division of Genetics, Indian Council of Agricultural Research (ICAR)-Indian Agricultural Research Institute, New Delhi, India.
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