QTLs for black-point resistance in wheat and the identification of potential markers for use in breeding programmes
Article
Article Title | QTLs for black-point resistance in wheat and the identification of potential markers for use in breeding programmes |
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ERA Journal ID | 5322 |
Article Category | Article |
Authors | Lehmensiek, A. (Author), Campbell, A. W. (Author), Williamson, P. M. (Author), Michalowitz, M. (Author), Sutherland, M. W. (Author) and Daggard, G. E. (Author) |
Journal Title | Plant Breeding |
Journal Citation | 123 (5), pp. 410-416 |
Number of Pages | 7 |
Year | 2004 |
Publisher | John Wiley & Sons |
Place of Publication | Germany |
ISSN | 0179-9541 |
1439-0523 | |
Digital Object Identifier (DOI) | https://doi.org/10.1111/j.1439-0523.2004.01013.x |
Web Address (URL) | https://onlinelibrary.wiley.com/doi/abs/10.1111/j.1439-0523.2004.01013.x |
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. |
Keywords | wheat; black-point resistance; double haploid populations; QTL analysis; triticum aestivum |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 300406. Crop and pasture improvement (incl. selection and breeding) |
300409. Crop and pasture protection (incl. pests, diseases and weeds) | |
310599. Genetics not elsewhere classified | |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | Department of Biological and Physical Sciences |
Centre for Rural and Environmental Biotechnology | |
Department of Primary Industries and Fisheries, Queensland |
https://research.usq.edu.au/item/9y738/qtls-for-black-point-resistance-in-wheat-and-the-identification-of-potential-markers-for-use-in-breeding-programmes
2008
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