Hammond, John P., Mayes, S., Bowen, Helen C., Graham, Neil S., Hayden, Rory M., Love, C. G., Spracklen, William P., Wang, Jun, 1971 Feb. 10-, Welham, S. J., White, Philip J., King, Graham J. and Broadley, Martin R.. (2011) Regulatory hotspots are associated with plant gene expression under varying soil phosphorus supply in brassica rapa. Plant Physiology, Vol.156 (No.3). pp. 1230-1241. ISSN 0032-0889

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Abstract

Gene expression is a quantitative trait that can be mapped genetically in structured populations to identify expression quantitative trait loci (eQTL). Genes and regulatory networks underlying complex traits can subsequently be inferred. Using a recently released genome sequence, we have defined cis- and trans-eQTL and their environmental response to low phosphorus (P) availability within a complex plant genome and found hotspots of trans-eQTL within the genome. Interval mapping, using P supply as a covariate, revealed 18,876 eQTL. trans-eQTL hotspots occurred on chromosomes A06 and A01 within Brassica rapa; these were enriched with P metabolism-related Gene Ontology terms (A06) as well as chloroplast- and photosynthesis-related terms (A01). We have also attributed heritability components to measures of gene expression across environments, allowing the identification of novel gene expression markers and gene expression changes associated with low P availability. Informative gene expression markers were used to map eQTL and P use efficiency-related QTL. Genes responsive to P supply had large environmental and heritable variance components. Regulatory loci and genes associated with P use efficiency identified through eQTL analysis are potential targets for further characterization and may have potential for crop improvement.

Item Type:	Journal Article
Subjects:	Q Science > QK Botany S Agriculture > S Agriculture (General) S Agriculture > SB Plant culture
Divisions:	Faculty of Science > Life Sciences (2010- )
Library of Congress Subject Headings (LCSH):	Soils -- Phosphorus content, Plant gene expression , Turnips
Journal or Publication Title:	Plant Physiology
Publisher:	American Society of Plant Biologists
ISSN:	0032-0889
Official Date:	2011
Volume:	Vol.156
Number:	No.3
Page Range:	pp. 1230-1241
Identification Number:	10.1104/pp.111.175612
Status:	Peer Reviewed
Publication Status:	Published
URI:	http://wrap.warwick.ac.uk/id/eprint/39454

Data sourced from Thomson Reuters' Web of Knowledge

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