Genetic control of root architectural plasticity in maize

Schneider, Hannah M.; Klein, Stephanie P.; Hanlon, Meredith T.; Nord, Eric A.; Kaeppler, Shawn; Brown, Kathleen M.; Warry, Andrew; Bhosale, Rahul; Lynch, Jonathan P.; Dodd, Ian

doi:10.1093/jxb/eraa084

Genetic control of root architectural plasticity in maize

Journal Article · Fri Feb 21 00:00:00 EST 2020 · Journal of Experimental Botany

DOI:https://doi.org/10.1093/jxb/eraa084· OSTI ID:1637590

Schneider, Hannah M. ^[1]; Klein, Stephanie P. ^[2]; Hanlon, Meredith T. ^[2]; Nord, Eric A. ^[2]; Kaeppler, Shawn ^[3]; ^[2]; Warry, Andrew ^[4]; Bhosale, Rahul ^[5]; ^[2]; Dodd, Ian ^[6]

Pennsylvania State Univ., University Park, PA (United States); Penn State University
Pennsylvania State Univ., University Park, PA (United States)
Univ. of Wisconsin, Madison, WI (United States)
Univ. of Nottingham (United Kingdom)
Univ. of Nottingham, Sutton Bonington (United Kingdom)
Lancaster Univ. (United Kingdom)

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.

View Accepted Manuscript (DOE)

Research Organization:: Pennsylvania State Univ., University Park, PA (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AR0000821

OSTI ID:: 1637590

Journal Information:: Journal of Experimental Botany, Journal Name: Journal of Experimental Botany Journal Issue: 10 Vol. 71; ISSN 0022-0957

Publisher:: Oxford University PressCopyright Statement

Country of Publication:: United States

Language:: English

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