Berry, P. M. (Peter M.), Teakle, Graham, Foulkes, John, White, Philip J. and Spink, J. H. (John H.). (2008) Breeding for improved nitrogen use efficiency in oilseed rape. Acta Horticulturae, Vol.867 . ISSN 0567-7572

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Abstract

Oilseed rape has a high requirement for nitrogen (N) fertiliser relative to its seed yield. This paper uses published and unpublished work to explore the extent to which the N use efficiency (seed yield ÷ N supply) of oilseed rape could be improved without reducing seed yield. It was estimated that if the concentration of N in the stem and pod wall at crop maturity could be reduced from 1.0 to 0.6%, the root length density increased to 1 cm/cm3 to 100 cm soil depth and the post flowering N uptake increased by 20 kg N/ha then the fertiliser requirement could be reduced from 191 to 142 kg N/ha and the N use efficiency could be increased from 15.2 to 22.4 kg of seed dry matter per kg N. Genetic variation was found for all of the traits that were estimated to be important for N use efficiency. This indicates that there is significant scope for plant breeders to reduce N use efficiency in oilseed rape.

Item Type:	Journal Article
Subjects:	Q Science > QK Botany S Agriculture > SB Plant culture
Divisions:	Faculty of Science > Life Sciences (2010- ) > Warwick HRI (2004-2010)
Library of Congress Subject Headings (LCSH):	Rape (Plant) -- Breeding, Rape (Plant) -- Genetics, Plants -- Effect of nitrogen on, Nitrogen fertilizers
Journal or Publication Title:	Acta Horticulturae
Publisher:	International Society for Horticultural Science
ISSN:	0567-7572
Date:	2008
Volume:	Vol.867
Status:	Not Peer Reviewed
Access rights to Published version:	Open Access
Funder:	Great Britain. Dept. for Environment, Food & Rural Affairs (DEFRA)
References:	Berry, P.M. and Spink, J.H. (2006). A physiological analysis of oilseed rape yields: Past and future. Journal of Agricultural Science, Cambridge 144, 381-392. Blake, J., Spink, J. & Bingham, I. (2006). Management of oilseed rape to balance root and canopy growth. HGCA Project Report No. 402, pp. 22. Home-Grown Cereals Authority, London. Critchley, C.S. (2001). A physiological explanation for the canopy nitrogen requirement of winter wheat. PhD Thesis, Nottingham University. Grindlay, D.J.C. (1997). Towards an explanation of crop nitrogen demand based on the optimisation of leaf nitrogen per unit leaf area. Journal of Agricultural Science 128, 377-396. Gammelvind, L. H., Schjoerring, J. K., Mogensen, C. R., Jensen, C. R. & Bock, J. G. H. (1996). Photosynthesis in leaves and siliques of winter oilseed rape (Brassica napus L.). Plant and Soil 186, 227-236. King, J., Gay, A., Sylvester-Bradley, R., Bingham, I., Foulkes, J., Gregory, P. & Robinson, D. (2004). Modelling cereal root systems for water and nitrogen capture: Towards and economic optimum. Annals of Botany 91, 383-390. Rossato, L., MacDuff, J.H., Laine, P., Le Deunff, E. and Ourry, A. (2002). Nitrogen storage and remobilisation in Brassica napus L. during the growth cycle: effects of methyl jasmonate on nitrate uptake, senescence, growth and VSP accumulation. J. Exp. Bot. 53, 1131-1141. Stafford, J.A. (1996). The effects of prochloraz on the growth and yield of oilseed rape. PhD Thesis, Nottingham University. Stokes, D. (1998). Establishment and canopy management in oilseed rape. Proceedings of the sixth Home-Grown Cereals Authority R&D Conference on cereals and oilseeds, pp 6.1-6.12. HGCA, London.
URI:	http://wrap.warwick.ac.uk/id/eprint/3489

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