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Resistance to the root-lesion nematode Pratylenchus thornei of Iranian landrace wheat.

Sheedy, J.G. and Thompson, J.P. (2009) Resistance to the root-lesion nematode Pratylenchus thornei of Iranian landrace wheat. Australasian Plant Pathology, 38 (5). pp. 478-489.

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Article Link(s): http://dx.doi.org/10.1071/AP09030

Publisher URL: http://www.publish.csiro.au/home.htm

Abstract

Pratylenchus thornei is widespread throughout the wheat-growing regions in Australia and overseas and can cause yield losses of up to 70% in some intolerant cultivars. The most effective forms of management of P. thornei populations are crop rotation and plant breeding. There have been no wheat accessions identified as completely resistant to P. thornei, therefore breeding programs have used moderately resistant parents. The objective of the present research was to evaluate 274 Iranian landrace wheats for resistance to P. thornei and identify accessions with resistance superior to the current best resistance source (GS50a). Plants were grown in P. thornei inoculated soil under controlled conditions in a glasshouse pot experiment for 16 weeks. Ninety-two accessions found to be resistant or moderately so were retested in a second experiment. From combined analysis of these experiments, 34 accessions were identified as resistant with reproduction factors (final population per kg soil/initial inoculum rate per kg soil) <= 1. In total, 25 accessions were more resistant than GS50a, with AUS28470 significantly (P < 0.05) more resistant. The resistant Iranian landraces identified in the present study are a valuable untapped genetic pool offering improved levels of P. thornei resistance over current parents in Australian wheat-breeding programs.

Item Type:Article
Business groups:Agri-Science, Crop and Food Science
Additional Information:© Australasian Plant Pathology Society.
Keywords:Durum; khorosan wheat; persian wheat; plant breeding; Triticum aestivum; Triticum turgidum ssp carthlicum; Triticum turgidum ssp durum; Triticum turgidum ssp turanicum; russian wheat; spring wheat; aphid.
Subjects:Plant pests and diseases > Pest control and treatment of diseases. Plant protection > Organic plant protection. Biological control
Plant pests and diseases > Individual or types of plants or trees > Wheat
Deposited On:30 Nov 2009 05:09
Last Modified:26 Oct 2011 01:52

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