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Mapping and QTL analysis of the barley population Tallon × Kaput

Cakir, M. and Poulsen, D. and Galwey, N.W. and Ablett, G.A. and Chalmers, K.J. and Platz, G.J. and Park, R.F. and Lance, R.C.M. and Panozzo, J.F. and Read, B.J. and Moody, D.B. and Barr, A.R. and Johnston, P. and Li, C.D. and Boyd, W.J.R. and Grime, C.R. and Appels, R. and Jones, M.G.K. and Langridge, P. (2003) Mapping and QTL analysis of the barley population Tallon × Kaput. Australian Journal of Agricultural Research, 54 (12). pp. 1155-1162.

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Article Link(s): http://dx.doi.org/10.1071/AR02238

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

Abstract

A genetic map of barley with 224 AFLP and 39 simple sequence repeat (SSR) markers was constructed using a doubled haploid (DH) mapping population from a cross between the varieties Tallon and Kaputar. Linkage groups were assigned to individual barley chromosomes using the published map locations of the SSR markers as reference points. This genetic map was used to identify markers with linkage to agronomic, disease, and quality traits in barley. The population, which comprised 65 lines, was tested in a range of environments across Australia. Quantitative trait loci (QTLs) analyses were performed using software packages MapMaker, MapManager, and Qgene. Significant associations with markers were found for several traits. Grain yield showed significant association with regions on chromosomes 2H, 3H, and 5H over a range of sites throughout Australia. Regions on chromosomes 2H and 3H explained 30% and 26% of variation in lodging, respectively. Among quality traits, diastatic power was associated with regions on chromosomes 1H, 2H, and 5H (R2 = 37%). Hot water extract was associated with a region on chromosome 6H and a marker not assigned to a chromosome (R2 = 45%). There were also environment-specific QTLs for the traits analysed. The markers identified here present an opportunity for marker assisted selection of lines for these traits in barley breeding programs.

Item Type:Article
Corporate Creators:Department of Employment, Economic Development and Innovation (DEEDI), Agri-Science, Crop and Food Science
Business groups:Agri-Science, Crop and Food Science
Additional Information:Reproduced with permission from © CSIRO Publishing. Access to published version may be available via Publisher’s website.
Keywords:Simple sequence repeat (SSR); amplified fragment length polymorphism (AFLP); genetic mapping; quantitative trait loci (QTL); barley; grain.
Subjects:Plant culture > Field crops > Barley
Science > Biology > Genetics > Quantitative genetics (esp. Quantitative Trait Loci (QTL) articles)
Deposited On:07 May 2004
Last Modified:08 Jun 2015 15:49

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