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Genetic variation in CaTIFY4b contributes to drought adaptation in chickpea

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Relation http://oar.icrisat.org/12291/
https://onlinelibrary.wiley.com/doi/full/10.1111/pbi.13840
https://doi.org/10.1111/pbi.13840
 
Title Genetic variation in CaTIFY4b contributes to drought
adaptation in chickpea
 
Creator Barmukh, R
Roorkiwal, M
Garg, V
Khan, A W
German, L
Jaganathan, D
Chitikineni, A
Kholova, J
Kudapa, H
Samineni, S
Sivasakthi, K
Kale, S M
Gaur, P M
Sagurthi, S R
Benitez-Alfonso, Y
Varshney, R K
 
Subject Chickpea
Genetics and Genomics
Legume Crops
 
Description Chickpea production is vulnerable to drought stress. Identifying the genetic components underlying drought adaptation is crucial for enhancing chickpea productivity. Here, we present the fine mapping and characterization of ‘QTL-hotspot’, a genomic region controlling chickpea
growth with positive consequences on crop production under drought. We report that a non-synonymous substitution in the transcription factor CaTIFY4b regulates seed weight and organ size in chickpea. Ectopic expression of CaTIFY4b in Medicago truncatula enhances root growth under water deficit. Our results suggest that allelic variation in ‘QTL-hotspot’ improves pre-anthesis water use, transpiration efficiency, root architecture and canopy development, enabling high-yield performance under terminal drought conditions. Gene expression analysis indicated that CaTIFY4b may regulate organ size under water deficit by modulating the expression of GRF-INTERACTING FACTOR1 (GIF1), a transcriptional co-activator of Growth-Regulating Factors.
Taken together, our study offers new insights into the role of CaTIFY4b and on diverse physiological and molecular mechanisms underpinning chickpea growth and production under
specific drought scenarios.
 
Publisher Blackwell Publishing
 
Date 2022-05-09
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Rights cc_attribution
 
Identifier http://oar.icrisat.org/12291/1/Plant%20Biotechnology%20Journal_20_1701-1715_2022.pdf
Barmukh, R and Roorkiwal, M and Garg, V and Khan, A W and German, L and Jaganathan, D and Chitikineni, A and Kholova, J and Kudapa, H and Samineni, S and Sivasakthi, K and Kale, S M and Gaur, P M and Sagurthi, S R and Benitez-Alfonso, Y and Varshney, R K (2022) Genetic variation in CaTIFY4b contributes to drought adaptation in chickpea. Plant Biotechnology Journal, 20. pp. 1701-1715. ISSN 1467-7652