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Meta-QTL analysis in wheat: progress, challenges and opportunities

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Abstract

Wheat, an important cereal crop globally, faces major challenges due to increasing global population and changing climates. The production and productivity are challenged by several biotic and abiotic stresses. There is also a pressing demand to enhance grain yield and quality/nutrition to ensure global food and nutritional security. To address these multifaceted concerns, researchers have conducted numerous meta-QTL (MQTL) studies in wheat, resulting in the identification of candidate genes that govern these complex quantitative traits. MQTL analysis has successfully unraveled the complex genetic architecture of polygenic quantitative traits in wheat. Candidate genes associated with stress adaptation have been pinpointed for abiotic and biotic traits, facilitating targeted breeding efforts to enhance stress tolerance. Furthermore, high-confidence candidate genes (CGs) and flanking markers to MQTLs will help in marker-assisted breeding programs aimed at enhancing stress tolerance, yield, quality and nutrition. Functional analysis of these CGs can enhance our understanding of intricate trait-related genetics. The discovery of orthologous MQTLs shared between wheat and other crops sheds light on common evolutionary pathways governing these traits. Breeders can leverage the most promising MQTLs and CGs associated with multiple traits to develop superior next-generation wheat cultivars with improved trait performance. This review provides a comprehensive overview of MQTL analysis in wheat, highlighting progress, challenges, validation methods and future opportunities in wheat genetics and breeding, contributing to global food security and sustainable agriculture.

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References to the data gathered in this review are cited in the manuscript.

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Funding

The authors are grateful to the Indian Council of Agricultural Research, Government of India, for supporting this research under the ICAR-NBPGR-DBT Wheat Network Project (No. BT/Ag/Network/Wheat/2019-20).

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SK, DS, AK, GPS and AKS were involved in conceptualization.DS, AK, AS, PS, AS, ZAM, AKP and AY were involved in writing—original draft preparation.DS, AK, PS, NB, UK, AKP, SJ, MP, RRM, PB, DCM, NB, MCY and KBG were involved in writing—review and revision.AS, AS, PS, ZAM, AY, UK, RRM, KBG, PB, DCM, NB, SK and MCY visualization.SK, NB, AKS and GPS were involved in supervision.

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Correspondence to Sundeep Kumar.

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Communicated by Rajeev K. Varshney.

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Sharma, D., Kumari, A., Sharma, P. et al. Meta-QTL analysis in wheat: progress, challenges and opportunities. Theor Appl Genet 136, 247 (2023). https://doi.org/10.1007/s00122-023-04490-z

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