QTLs for black point resistance in wheat and the identification of potential markers for use in breeding programs

Lehmensiek, A. and Campbell, A. W. and Williamson, P. M. and Michalowitz, M. and Sutherland, M. W. and Daggard, G. E. (2004) QTLs for black point resistance in wheat and the identification of potential markers for use in breeding programs. Plant Breeding, 123 (5). pp. 410-416. ISSN 0179-9541

Abstract

Quantitative trait loci (QTLs) for black-point resistance have been mapped in two doubled haploid-derived wheat populations, each thought to contain unrelated sources of resistance. In the Sunco x Tasman-derived population, QTLs were located on chromosomes 1D, 2B, 3D, 4A, 5A and 7A with each QTL explaining between 4 and 15% of the observed phenotypic variance. QTLs were contributed by both parents. In the Cascades x AUS1408-derived population, QTLs from Cascades were identified on chromosomes 2A, 2D and 7A with each QTL explaining between 12 and 18% of the phenotypic variance. Several markers were identified which are promising candidates for use in marker-assisted selection programmes. If one, two or three of these markers would have been used to select for black-point resistance in the Sunco x Tasman population, then with one marker 34 of 39 resistant lines, with two markers 23 of 32 and with three markers 17 of 32 would have been selected. At the same time, 67 false positives obtained by selecting with one marker are reduced to 24 by selection with two markers and to 11 by selection with three markers. Similarly, if one, two or three markers are used to select for black-point resistance in the Cascades x AUS1408 populations, then with one marker 25 of 31 resistant lines, with two markers 26 of 31 and with three markers 10 of 31 are selected. At the same time, 14 false positives are obtained with one marker are reduced to six by selection with two markers and no false positives are selected using three markers.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Awaiting Author's version from author. Deposited in accordance with the copyright policy of the publisher.
Depositing User: Dr Anke Lehmensiek
Faculty / Department / School: Historic - Faculty of Sciences - Department of Biological and Physical Sciences
Date Deposited: 21 Oct 2007 12:43
Last Modified: 27 Sep 2013 04:50
Uncontrolled Keywords: wheat; black-point resistance; double haploid populations; QTL analysis; triticum aestivum
Fields of Research (FOR2008): 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)
06 Biological Sciences > 0604 Genetics > 060411 Population, Ecological and Evolutionary Genetics
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.1439-0523.2004.01013.x
URI: http://eprints.usq.edu.au/id/eprint/3412

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