Genetic variation in CaTIFY4b contributes to drought adaptation in chickpea

被引：25

作者：

Barmukh, Rutwik ^{[1
,2
]}

Roorkiwal, Manish ^{[1
,3
,4
]}

Garg, Vanika ^{[1
]}

Khan, Aamir W. ^{[1
]}

German, Liam ^{[5
]}

Jaganathan, Deepa ^{[1
]}

Chitikineni, Annapurna ^{[1
]}

Kholova, Jana ^{[6
]}

Kudapa, Himabindu ^{[1
]}

Sivasakthi, Kaliamoorthy ^{[6
]}

Samineni, Srinivasan ^{[7
]}

Kale, Sandip M. ^{[1
]}

Gaur, Pooran M. ^{[4
,7
]}

Sagurthi, Someswar Rao ^{[2
]}

Benitez-Alfonso, Yoselin ^{[5
]}

Varshney, Rajeev K. ^{[1
,4
,8
]}

机构：

[1] Int Crops Res Inst Semi Arid Trop, Ctr Excellence Genom & Syst Biol, Hyderabad, India

[2] Osmania Univ, Dept Genet, Hyderabad, India

[3] United Arab Emirates Univ, Khalifa Ctr Genet Engn & Biotechnol, Al Ain, U Arab Emirates

[4] Univ Western Australia, UWA Inst Agr, Perth, WA, Australia

[5] Univ Leeds, Ctr Plant Sci, Sch Biol, Leeds, W Yorkshire, England

[6] Int Crops Res Inst Semi Arid Trop, Crop Physiol & Modelling, Hyderabad, India

[7] Int Crops Res Inst Semi Arid Trop, Crop Breeding, Hyderabad, India

[8] Murdoch Univ, Food Futures Inst, State Agr Biotechnol Ctr, Murdochs Ctr Crop & Food Innovat, Murdoch, WA, Australia

来源：

PLANT BIOTECHNOLOGY JOURNAL | 2022年 / 20卷 / 09期

基金：

英国生物技术与生命科学研究理事会; 比尔及梅琳达.盖茨基金会;

关键词：

legumes; terminal drought; seed weight; root system architecture; transpiration efficiency; vigour; CROPPING SYSTEMS; TOLERANCE; YIELD; SIZE; TRANSCRIPTOME; RESOURCE; SEQUENCE; GROWTH; TRAIT; WORLD;

D O I：

10.1111/pbi.13840

中图分类号：

Q81 [生物工程学（生物技术）]; Q93 [微生物学];

学科分类号：

071005 ; 0836 ; 090102 ; 100705 ;

摘要：

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.

引用

页码：1701 / 1715

页数：15

共 58 条

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