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Natural genetic variation in caesium (Cs) accumulation by Arabidopsis thaliana

Payne, K. A., Bowen, H. C., Hammond, J. P., Hampton, C. R., Lynn, J. R., Mead, A., Swarup, K., Bennett, M. J., White, P. J. and Broadley, M. R. (2004) Natural genetic variation in caesium (Cs) accumulation by Arabidopsis thaliana. New Phytologist, 162 (2). pp. 535-548. ISSN 1469-8137

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To link to this item DOI: 10.1111/j.1469-8137.2004.01026.x

Abstract/Summary

Ingestion of caesium (Cs) radioisotopes poses a health risk to humans. Crop varieties that accumulate less Cs in their edible tissues may provide a useful countermeasure. This study was performed to determine whether quantitative genetics on a model plant (Arabidopsis thaliana) might inform such 'safe'-crop strategies. Arabidopsis accessions and recombinant inbred lines (RILs), from Landsberg erecta (Ler) x Cape Verdi Island (Cvi), Ler x Columbia (Col), and Niederzenz (Nd) x Col mapping populations, were grown on agar supplemented with subtoxic levels of Cs. Shoot Cs concentration varied up to three-fold, and shoot f. wt varied up to 25-fold within populations. The heritability of growth and Cs accumulation traits ranged from 0.06 to 0.28. Four quantitative trait loci (QTL) accounted for > 80 of the genetic contribution to the total phenotypic variation in shoot Cs concentration in the Ler x Col population. QTL identified in this study, in particular, QTL co-localizing to the top and bottom regions of Chromosomes I and V in two different mapping populations, are amenable to positional cloning and, through collinearity, may inform selection or breeding strategies for the development of 'safe' crops.

Item Type:Article
Refereed:Yes
Divisions:Faculty of Life Sciences > School of Biological Sciences > Department of Bio-Engineering
Interdisciplinary centres and themes > Centre for Food Security
Faculty of Life Sciences > School of Agriculture, Policy and Development > Biodiversity, Crops and Agroecosystems Division > Crops Research Group
ID Code:33875
Uncontrolled Keywords:Arabidopsis caesium (Cs) countermeasures phytoextraction quantitative trait loci (QTL) recombinant inbred lines (RILs) growth
Publisher:Wiley

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