ArticleBMC plant biology2023
Dissection of QTLs conferring drought tolerance in B. carinata derived B. juncea introgression lines.
Article in BMC plant biology, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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6 citing papers in PubMed, 6 citations in OpenAlex.
- Dissection of quantitative trait loci governing root system architecture under aluminium toxicity stress conditions in Brassica carinata-derived Brassica juncea introgression lines.BMC plant biology · 2026Article
- Identification of a robust QTL hotspot across environments governing drought tolerance in lentil (Lens culinaris Medikus).BMC genomics · 2026Article
- PpZAT12 from a native Kentucky bluegrass (Poa pratensis L.) confers drought tolerance through regulating antioxidant defense system and multiple metabolic pathways.BMC plant biology · 2026Article
- Source-sink relationship inFrontiers in plant science · 2026Article
- Hierarchical Regulatory Networks Reveal Conserved Drivers of Plant Drought Response at the Cell-Type Level.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2025Article
- GWAS and WGCNA analysis uncover candidate genes associated with drought inFrontiers in plant science · 2025Article
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17 authors at 7 institutions in 2 countries.
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Abstract
backgroundDrought 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.
methodThe 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.
resultsThe 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.
conclusionsThe 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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