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JXB Advance Access originally published online on April 3, 2009
Journal of Experimental Botany 2009 60(7):1953-1968; doi:10.1093/jxb/erp083
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© The Author [2009]. Published by Oxford University Press [on behalf of the Society for Experimental Biology]. All rights reserved. For Permissions, please e-mail: journals.permissions@oxfordjournals.org

RESEARCH PAPER

Shoot yield drives phosphorus use efficiency in Brassica oleracea and correlates with root architecture traits

John P. Hammond1 *,{dagger}, Martin R. Broadley2 *, Philip J. White3 *, Graham J. King4, Helen C. Bowen1, Rory Hayden1, Mark C. Meacham2, Andrew Mead1, Tracey Overs1, William P. Spracklen1 and Duncan J. Greenwood1

1Warwick HRI, University of Warwick, Wellesbourne, Warwick CV35 9EF, UK
2Plant and Crop Sciences Division, University of Nottingham, Sutton Bonington, Leicestershire LE12 5RD, UK
3Scottish Crop Research Institute, Invergowrie, Dundee DD2 5DA, UK
4Rothamsted Research, Harpenden, Hertfordshire AL5 2JQ, UK

{dagger} To whom correspondence should be addressed. E-mail: john.hammond{at}warwick.ac.uk

The environmental and financial costs of using inorganic phosphate fertilizers to maintain crop yield and quality are high. Breeding crops that acquire and use phosphorus (P) more efficiently could reduce these costs. The variation in shoot P concentration (shoot-P) and various measures of P use efficiency (PUE) were quantified among 355 Brassica oleracea L. accessions, 74 current commercial cultivars, and 90 doubled haploid (DH) mapping lines from a reference genetic mapping population. Accessions were grown at two or more external P concentrations in glasshouse experiments; commercial and DH accessions were also grown in replicated field experiments. Within the substantial species-wide diversity observed for shoot-P and various measures of PUE in B. oleracea, current commercial cultivars have greater PUE than would be expected by chance. This may be a consequence of breeding for increased yield, which is a significant component of most measures of PUE, or early establishment. Root development and architecture correlate with PUE; in particular, lateral root number, length, and growth rate. Significant quantitative trait loci associated with shoot-P and PUE occur on chromosomes C3 and C7. These data provide information to initiate breeding programmes to improve PUE in B. oleracea.

Key words: Brassica, diversity, efficiency, napus, oleracea, phosphate, phosphorus, QTL, rapa, root

* These authors contributed equally to the work.

Received 12 December 2008; Revised 26 February 2009 Accepted 27 February 2009


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P. J. White, J. P. Hammond, G. J. King, H. C. Bowen, R. M. Hayden, M. C. Meacham, W. P. Spracklen, and M. R. Broadley
Genetic analysis of potassium use efficiency in Brassica oleracea
Ann. Bot., October 8, 2009; (2009) mcp253v1.
[Abstract] [Full Text] [PDF]


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