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Developmental genetics of maize vegetative shoot architecture

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Abstract

More than 1.1 billion tonnes of maize grain were harvested across 197 million hectares in 2019 (FAOSTAT 2020). The vast global productivity of maize is largely driven by denser planting practices, higher yield potential per area of land, and increased yield potential per plant. Shoot architecture, the three-dimensional structural arrangement of the above-ground plant body, is critical to maize grain yield and biomass. Structure of the shoot is integral to all aspects of modern agronomic practices. Here, the developmental genetics of the maize vegetative shoot is reviewed. Plant architecture is ultimately determined by meristem activity, developmental patterning, and growth. The following topics are discussed: shoot apical meristem, leaf architecture, axillary meristem and shoot branching, and intercalary meristem and stem activity. Where possible, classical and current studies in maize developmental genetics, as well as recent advances leveraged by “-omics” analyses, are highlighted within these sections.

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Acknowledgements

This manuscript benefited from the insightful comments and helpful critique provided by China Lunde, Jack Satterlee, Zhaobin Dong, María Jazmín Abraham-Juárez, and Kevin Ahern, as well as two anonymous reviewers—to all of you, many thanks for improving clarity of this manuscript. Bret Timmons and Thomas Paul are gratefully acknowledged for excellent plant care.

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JS was supported by the National Science Foundation Plant Genome Postdoctoral Research Fellowship (IOS-1710973)

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    Josh Strable

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Strable, J. Developmental genetics of maize vegetative shoot architecture. Mol Breeding 41, 19 (2021). https://doi.org/10.1007/s11032-021-01208-1

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