Seedling root system adaptation to water availability during maize domestication and global expansion
- PMID: 38778242
- DOI: 10.1038/s41588-024-01761-3
Seedling root system adaptation to water availability during maize domestication and global expansion
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.
© 2024. The Author(s), under exclusive licence to Springer Nature America, Inc.
References
-
- Meyer, R. S. & Purugganan, M. D. Evolution of crop species: genetics of domestication and diversification. Nat. Rev. Genet. 14, 840–852 (2013). - PubMed
-
- Yang, N. et al. Two teosintes made modern maize. Science 382, 1013 (2023).
-
- Ross-Ibarra, J. & Piperno, D. Maize moving. Figshare https://doi.org/10.6084/m9.figshare.12781307.v1 (2020).
-
- 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
MeSH terms
Substances
Grants and funding
LinkOut - more resources
Full Text Sources
