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. ISSN 0815-3191

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.


Statistics for USQ ePrint 25122
Statistics for this ePrint Item
Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: © Australasian Plant Pathology Society 2009. Published Version restricted in accordance with copyright policy of publisher.
Faculty / Department / School: Historic - Faculty of Sciences - Department of Biological and Physical Sciences
Date Deposited: 24 Apr 2014 11:46
Last Modified: 08 Dec 2015 05:56
Uncontrolled Keywords: durum; Khorosan wheat; Persian wheat; plant breeding; Triticum aestivum; Triticum turgidum ssp. carthlicum; Triticum turgidum ssp. durum; Triticum turgidum ssp. turanicum
Fields of Research : 06 Biological Sciences > 0604 Genetics > 060412 Quantitative Genetics (incl. Disease and Trait Mapping Genetics)
07 Agricultural and Veterinary Sciences > 0703 Crop and Pasture Production > 070305 Crop and Pasture Improvement (Selection and Breeding)
07 Agricultural and Veterinary Sciences > 0703 Crop and Pasture Production > 070308 Crop and Pasture Protection (Pests, Diseases and Weeds)
Socio-Economic Objective: D Environment > 96 Environment > 9604 Control of Pests, Diseases and Exotic Species > 960413 Control of Plant Pests, Diseases and Exotic Species in Farmland, Arable Cropland and Permanent Cropland Environments
B Economic Development > 82 Plant Production and Plant Primary Products > 8205 Winter Grains and Oilseeds > 820507 Wheat
Identification Number or DOI: 10.1071/AP09030
URI: http://eprints.usq.edu.au/id/eprint/25122

Actions (login required)

View Item Archive Repository Staff Only