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Breeding Drought-Tolerant Pearl Millet Using Conventional and Genomic Approaches: Achievements and Prospects

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Relation http://oar.icrisat.org/11987/
https://doi.org/10.3389/fpls.2022.781524
doi:10.3389/fpls.2022.781524
 
Title Breeding Drought-Tolerant Pearl Millet Using Conventional and Genomic Approaches: Achievements and Prospects
 
Creator Srivastava, R K
Yadav, O P
Kaliamoorthy, S
Gupta, S K
Serba, D D
Choudhary, S
Govindaraj, M
Kholová, J
Murugesan, T
Satyavathi, C T
Gumma, M K
Singh, R B
Bollam, S
Gupta, R
Varshney, R K
 
Subject Drought Tolerance
Drought
Genetics and Genomics
 
Description Pearl millet [Pennisetum glaucum (L.) R. Br.] is a C4 crop cultivated for its grain and
stover in crop-livestock-based rain-fed farming systems of tropics and subtropics in
the Indian subcontinent and sub-Saharan Africa. The intensity of drought is predicted
to further exacerbate because of looming climate change, necessitating greater focus
on pearl millet breeding for drought tolerance. The nature of drought in different target
populations of pearl millet-growing environments (TPEs) is highly variable in its timing,
intensity, and duration. Pearl millet response to drought in various growth stages
has been studied comprehensively. Dissection of drought tolerance physiology and
phenology has helped in understanding the yield formation process under drought
conditions. The overall understanding of TPEs and differential sensitivity of various
growth stages to water stress helped to identify target traits for manipulation through
breeding for drought tolerance. Recent advancement in high-throughput phenotyping
platforms has made it more realistic to screen large populations/germplasm for droughtadaptive
traits. The role of adapted germplasm has been emphasized for drought
breeding, as the measured performance under drought stress is largely an outcome
of adaptation to stress environments. Hybridization of adapted landraces with selected
elite genetic material has been stated to amalgamate adaptation and productivity.
Substantial progress has been made in the development of genomic resources
that have been used to explore genetic diversity, linkage mapping (QTLs), markertrait
association (MTA), and genomic selection (GS) in pearl millet. High-throughput
genotyping (HTPG) platforms are now available at a low cost, offering enormous
opportunities to apply markers assisted selection (MAS) in conventional breeding
programs targeting drought tolerance. Next-generation sequencing (NGS) technology,
micro-environmental modeling, and pearl millet whole genome re-sequence information
covering circa 1,000 wild and cultivated accessions have helped to greater understand germplasm, genomes, candidate genes, and markers. Their application in molecular
breeding would lead to the development of high-yielding and drought-tolerant pearl
millet cultivars. This review examines how the strategic use of genetic resources, modern
genomics, molecular biology, and shuttle breeding can further enhance the development
and delivery of drought-tolerant cultivars.
 
Publisher Frontiers Media
 
Date 2022-04
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://oar.icrisat.org/11987/1/04_fpls-13-781524.pdf
Srivastava, R K and Yadav, O P and Kaliamoorthy, S and Gupta, S K and Serba, D D and Choudhary, S and Govindaraj, M and Kholová, J and Murugesan, T and Satyavathi, C T and Gumma, M K and Singh, R B and Bollam, S and Gupta, R and Varshney, R K (2022) Breeding Drought-Tolerant Pearl Millet Using Conventional and Genomic Approaches: Achievements and Prospects. Frontiers in Plant Science (TSI), 13. pp. 1-20. ISSN 1664-462X