Genomic Designing of Pearl Millet: A Resilient Crop for Arid and Semi-arid Environments

Serba, D D and Yadav, R S and Varshney, R K and Gupta, S K and Govindaraj, M and Srivastava, R K and Gupta, R and Perumal, R and Tesso, T T (2020) Genomic Designing of Pearl Millet: A Resilient Crop for Arid and Semi-arid Environments. In: Genomic Designing of Climate-Smart Cereal Crops. Springer, Cham, Switzerland, pp. 221-286. ISBN 978-3-319-93381-8

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Pearl millet [Pennisetum glaucum (L.) R. Br.; Syn. Cenchrus americanus (L.) Morrone] is the sixth most important cereal in the world. Today, pearl millet is grown on more than 30 million ha mainly in West and Central Africa and the Indian sub-continent as a staple food for more than 90 million people in agriculturally marginal areas. It is rich in proteins and minerals and has numerous health benefits such as being gluten-free and having slow-digesting starch. It is grown as a forage crop in temperate areas. It is drought and heat tolerant, and a climate-smart crop that can withstand unpredictable variability in climate. However, research on pearl millet improvement is lagging behind other major cereals mainly due to limited investment in terms of man and money power. So far breeding achievements include the development of cytoplasmic male sterility (CMS), maintenance counterparts (rf) system and nuclear fertility restoration genes (Rf) for hybrid breeding, dwarfing genes for reduced height, improved input responsiveness, photoperiod neutrality for short growing season, and resistance to important diseases. Further improvement of pearl millet for genetic yield potential, stress tolerance, and nutritional quality traits would enhance food and nutrition security for people living in agriculturally dissolute environments. Application of molecular technology in the pearl millet breeding program has a promise in enhancing the selection efficiency while shortening the lengthy phenotypic selection process ultimately improving the rate of genetic gains. Linkage analysis and genome-wide association studies based on different marker systems in detecting quantitative trait loci (QTLs) for important agronomic traits are well demonstrated. Genetic resources including wild relatives have been categorized into primary, secondary and tertiary gene pools based on the level of genetic barriers and ease of gene introgression into pearl millet. A draft on pearl millet whole genome sequence was recently published with an estimated 38,579 genes annotated to establish genomic-assisted breeding. Resequencing a large number of germplasm lines and several population genomic studies provided a valuable insight into population structure, genetic diversity and domestication history of the crop. Successful improvement in combination with modern genomic/genetic resources, tools and technologies and adoption of pearl millet will not only improve the resilience of global food system through on-farm diversification but also dietary intake which depends on diminishingly fewer crops.

Item Type: Book Section
Divisions: Research Program : Genetic Gains
Uncontrolled Keywords: Biofortification, Climate resilient, Cytoplasmic male sterility, Dwarfing gene, Gene pool, Genomic-assisted breeding, Pennisetum glaucum
Subjects: Others > Climate Smart Agriculture (CSA)
Others > Plant Breeding
Others > Cereals
Mandate crops > Millets > Pearl Millet
Others > Genetics and Genomics
Others > Food and Nutrition
Depositing User: Mr Arun S
Date Deposited: 10 Mar 2020 11:04
Last Modified: 11 Mar 2020 04:11
Acknowledgement: Funding for the senior author was provided by the United States Agency for International Development under Cooperative Agreement No. AID-OAA-A-13-00047 with the Kansas State University Sorghum and Millet Innovation Lab (SMIL). The contents are solely the responsibility of the authors and do not necessarily reflect the views of USAID or others. This is contribution number 19-043-B from the Kansas Agricultural Experiment Station.
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