ARS | Publication request: Haplotype analysis of genes for Fusarium head blight resistance in tetraploid wheat germplasm

Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: November 18, 2008
Publication Date: December 2, 2008
Citation: Chu, C., Chao, S., Cai, X., Zhong, S., Xu, S.S. 2008. Haplotype analysis of genes for Fusarium head blight resistance in tetraploid wheat germplasm. In: Canty, S.M., E. Walton, A. Clark., D. Ellis. J. Mundell, and D.A. Van Sanford (Eds.), Proceedings of the National Fusarium Head Blight Forum; 2008 Dec 2-4; Indianapolis, IN. Lexington, KY: University of Kentucky. pp.156

Technical Abstract: Haplotype analysis at the molecular marker loci associated with the known Fusarium head blight (FHB) resistance QTL in wheat can be used to identify resistance genes in the resistant germplasm, and thus provides practical information of pyramiding different sources of resistance for the development of resistant germplasm or cultivars. In this research, we analyzed haplotypes of 132 tetraploid wheat accessions with various levels of FHB resistance at 19 molecular marker loci associated with the known FHB resistance QTL on the chromosomes 2B (Triticum carthlicum ‘Blackbird’), 3A (T. aestivium ‘Frontana’ and T. dicoccoides ‘Israel A’), 3B (T. aestivium ‘Sumai 3’ and ‘Wanshuibai’), 5A (‘Sumai 3’ and ‘Frontana’), 6B (‘Blackbird’ and ‘Wangshuibai’), and 7A (T. dicoccoides PI 478742). Among the tetraploid wheat accessions included 40 accessions of T. carthlicum, 81 accessions of T. dicoccum, and 9 accessions of T. turgidum. We found 43 accessions, including two accessions of T. carthlicum, one accession of T. turgidum, and 39 accessions of T. dicoccum, showed different haplotypes at all the marker loci investigated, suggesting that these accessions may carry FHB resistance genes different from those in the known resistance sources. The novel FHB resistance genes carried by the tetraploid wheat accessions identified in this research could be utilized to enhance FHB resistance of durum wheat as well as bread wheat.