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Genetic control of root architectural plasticity in maize

Schneider, Hannah M; Klein, Stephanie P; Nord, Eric; Kaeppler, Shawn M; Brown, Kathleen; Warry, Andrew; Bhosale, Rahul; Lynch, Jonathan

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Authors

Hannah M Schneider

Stephanie P Klein

Eric Nord

Shawn M Kaeppler

Kathleen Brown

Andrew Warry

Jonathan Lynch



Abstract

© 2020 The Author(s) 2020. Published by Oxford University Press on behalf of the Society for Experimental Biology. Root phenotypes regulate soil resource acquisition; however, their genetic control and phenotypic plasticity are poorly understood. We hypothesized that the responses of root architectural phenes to water deficit (stress plasticity) and different environments (environmental plasticity) are under genetic control and that these loci are distinct. Root architectural phenes were phenotyped in the field using a large maize association panel with and without water deficit stress for three seasons in Arizona and without water deficit stress for four seasons in South Africa. All root phenes were plastic and varied in their plastic response. We identified candidate genes associated with stress and environmental plasticity and candidate genes associated with phenes in well-watered conditions in South Africa and in well-watered and water-stress conditions in Arizona. Few candidate genes for plasticity overlapped with those for phenes expressed under each condition. Our results suggest that phenotypic plasticity is highly quantitative, and plasticity loci are distinct from loci that control phene expression in stress and non-stress, which poses a challenge for breeding programs. To make these loci more accessible to the wider research community, we developed a public online resource that will allow for further experimental validation towards understanding the genetic control underlying phenotypic plasticity.

Citation

Schneider, H. M., Klein, S. P., Nord, E., Kaeppler, S. M., Brown, K., Warry, A., …Lynch, J. (2020). Genetic control of root architectural plasticity in maize. Journal of Experimental Botany, 71(10), 3185-3197. https://doi.org/10.1093/jxb/eraa084

Journal Article Type Article
Acceptance Date Feb 20, 2020
Online Publication Date Feb 21, 2020
Publication Date May 30, 2020
Deposit Date Mar 12, 2020
Publicly Available Date Jun 3, 2020
Journal Journal of Experimental Botany
Print ISSN 0022-0957
Electronic ISSN 1460-2431
Publisher Oxford University Press
Peer Reviewed Peer Reviewed
Volume 71
Issue 10
Pages 3185-3197
DOI https://doi.org/10.1093/jxb/eraa084
Public URL https://nottingham-repository.worktribe.com/output/3929729
Publisher URL https://academic.oup.com/jxb/advance-article/doi/10.1093/jxb/eraa084/5742125

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