Identification of novel QTL for resistance to crown rot in the doubled haploid wheat population 'W21MMT70' x 'Mendos'

Bovill, W. D. and Ma, W. and Ritter, K. and Collard, B. C. Y. and Davis, M. and Wildermuth, G. B. and Sutherland, M. W. (2006) Identification of novel QTL for resistance to crown rot in the doubled haploid wheat population 'W21MMT70' x 'Mendos'. Plant Breeding, 125 (6). pp. 538-543. ISSN 0179-9541

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Abstract

Crown rot (casual agent Fusarium pseudograminearum) is a fungal disease of major significance to what cultivation in australia. A doubled haploid wheat population was produced from a cross between line 'W21MMT70', which displays partial seedling and adult plant (field) resistance to crown rot, and 'Mendos', which is moderately susceptible in seedling tests but partially resistant in field trials. Bulked segregant analysis (BSA) based on seedling trial data did not reveal markers fro crown rot resistance. A framework map was produced consisting of 128 microsatellite markers, four phenotypic markers, and one sequence tagged site marker. To this map 331 previously screened AFLP markers were then added. Three quantitative trait loci (QTL) were identified with composite interval mapping across all of the three seedling trials conducted. These QTL are located on chromosomes 2B, 2D and 5D. The 2D and 5D QTL are inherited from the line 'W21MMT70', whereas the 2B QTL is inherited from 'Mendos'. these loci are different from those associated with crown rot resistance in other wheat populations that have been examined, and may present an opportunity for pyramiding QTL to provide more durable resistance to crown rot.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Deposited in accordance with the copyright policy of the publsiher. The definitive version is available at www.blackwell-synergy.com
Depositing User: Ms Debbie White
Faculty / Department / School: Historic - Faculty of Sciences - Department of Biological and Physical Sciences
Date Deposited: 11 Oct 2007 00:47
Last Modified: 02 Jul 2013 22:38
Uncontrolled Keywords: Triticum aestivum; Fusarium pseudograminearum; QTL mapping; disease resistance; crown rot
Fields of Research (FOR2008): 10 Technology > 1001 Agricultural Biotechnology > 100105 Genetically Modified Field Crops and Pasture
07 Agricultural and Veterinary Sciences > 0703 Crop and Pasture Production > 070305 Crop and Pasture Improvement (Selection and Breeding)
06 Biological Sciences > 0607 Plant Biology > 060703 Plant Developmental and Reproductive Biology
Socio-Economic Objective (SEO2008): B Economic Development > 82 Plant Production and Plant Primary Products > 8205 Winter Grains and Oilseeds > 820507 Wheat
Identification Number or DOI: doi: 10.1111/j.1439-0523.2006.01251.x
URI: http://eprints.usq.edu.au/id/eprint/1533

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