doi:10.1071/AR05375

Flour yield QTLs in three Australian doubled haploid wheat populations

A. Lehmensiek ^A ^E, P. J. Eckermann ^B, A. P. Verbyla ^B, R. Appels ^C, M. W. Sutherland ^A, D. Martin ^D, G. E. Daggard ^A

^A Centre for Systems Biology, Faculty of Sciences, University of Southern Queensland, Toowoomba, Qld 4350, Australia.
^B Biometrics SA, University of Adelaide, PMB 1, Glen Osmond, SA 5064, Australia.
^C Molecular Plant Breeding CRC, Department of Agriculture, Murdoch University, Western Australia Locked Bag 4, Bentley Delivery Centre, WA 6983, Australia.
^D Queensland Department of Primary Industries and Fisheries, Leslie Research Centre, Toowoomba, Qld 4350, Australia.
^E Corresponding author. Email: lehmensi@usq.edu.au





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Australian Journal of Agricultural Research 57(10) 1115–1122 http://dx.doi.org/10.1071/AR05375
Submitted: 24 October 2005 Accepted: 9 June 2006 Published online: 27 September 2006

Abstract

Flour yield quantitative trait loci (QTLs) were identified in 3 Australian doubled haploid populations, Sunco × Tasman, CD87 × Katepwa, and Cranbrook × Halberd. Trial data from 3 to 4 sites or years were available for each population. QTLs were identified on chromosomes 2BS, 4B, 5AL, and 6BL in the Sunco × Tasman population, on chromosomes 4B, 5AS, and 6DL in the CD87 × Katepwa population, and on chromosomes 4DS, 5DS, and 7AS in the Cranbrook × Halberd population. In the Sunco × Tasman cross the highest genetic variance was detected with the QTL on chromosome 2B (31.3%), in the CD87 × Katepwa cross with the QTL on chromosome 4B (23.8%), and in the Cranbrook × Halberd cross with the QTL on chromosome 5D (18%). Only one QTL occurred in a similar location in more than one population, indicating the complexity of the flour yield character across different backgrounds.

Keywords: Triticum aestivum, doubled haploid lines, QTL mapping.

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