Animal Production Science Animal Production Science Society
Food, fibre and pharmaceuticals from animals
REVIEW

Improving salt tolerance of wheat and barley: future prospects

T. D. Colmer A B E , R. Munns A C and T. J. Flowers B D

A CRC for Plant-based Management of Dryland Salinity.

B School of Plant Biology, University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia.

C CSIRO Plant Industry, GPO Box 1600, Canberra, ACT 2601, Australia.

D School of Life Sciences, University of Sussex, Falmer, Brighton, Sussex, BN1 9QG, UK.

E Corresponding author. Email: tdcolmer@cyllene.uwa.edu.au

Australian Journal of Experimental Agriculture 45(11) 1425-1443 http://dx.doi.org/10.1071/EA04162
Submitted: 2 August 2004  Accepted: 8 March 2005   Published: 16 December 2005

Abstract

Cropping on saline land is restricted by the low tolerance of crops to salinity and waterlogging. Prospects for improving salt tolerance in wheat and barley include the use of: (i) intra-specific variation, (ii) variation for salt tolerance in the progenitors of these cereals, (iii) wide-hybridisation with halophytic ‘wild’ relatives (an option for wheat, but not barley), and (iv) transgenic techniques. In this review, key traits contributing to salt tolerance, and sources of variation for these within the Triticeae, are identified and recommendations for use of these traits in screening for salt tolerance are summarised. The potential of the approaches to deliver substantial improvements in salt tolerance is discussed, and the importance of adverse interactions between waterlogging and salinity are emphasised. The potential to develop new crops from the diverse halophytic flora is also considered.

Additional keywords: breeding, chloride, genetics, halophyte, Hordeum, potassium, salinity, sodium, transgenic, Triticum, waterlogging, ‘wild’ relatives.


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