Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2024 Jun;56(6):1245-1256.
doi: 10.1038/s41588-024-01761-3. Epub 2024 May 22.

Seedling root system adaptation to water availability during maize domestication and global expansion

Affiliations

Seedling root system adaptation to water availability during maize domestication and global expansion

Peng Yu et al. Nat Genet. 2024 Jun.

Abstract

The maize root system has been reshaped by indirect selection during global adaptation to new agricultural environments. In this study, we characterized the root systems of more than 9,000 global maize accessions and its wild relatives, defining the geographical signature and genomic basis of variation in seminal root number. We demonstrate that seminal root number has increased during maize domestication followed by a decrease in response to limited water availability in locally adapted varieties. By combining environmental and phenotypic association analyses with linkage mapping, we identified genes linking environmental variation and seminal root number. Functional characterization of the transcription factor ZmHb77 and in silico root modeling provides evidence that reshaping root system architecture by reducing the number of seminal roots and promoting lateral root density is beneficial for the resilience of maize seedlings to drought.

PubMed Disclaimer

References

    1. Meyer, R. S. & Purugganan, M. D. Evolution of crop species: genetics of domestication and diversification. Nat. Rev. Genet. 14, 840–852 (2013). - PubMed
    1. Hake, S. & Ross-Ibarra, J. Genetic, evolutionary and plant breeding insights from the domestication of maize. eLife 4, e05861 (2015). - PubMed - PMC
    1. Yang, N. et al. Two teosintes made modern maize. Science 382, 1013 (2023).
    1. Ross-Ibarra, J. & Piperno, D. Maize moving. Figshare https://doi.org/10.6084/m9.figshare.12781307.v1 (2020).
    1. Romero Navarro, J. A. et al. A study of allelic diversity underlying flowering-time adaptation in maize landraces. Nat. Genet. 49, 476–480 (2017). - PubMed

LinkOut - more resources