Submitted to: National Fusarium Head Blight Forum Proceedings
Publication Type: Abstract Only
Publication Acceptance Date: 1/2/2007
Publication Date: 1/2/2007
Citation: Chen, J., Fanelli, J., Griffey, C., Paling,, J., Maroof, M.A., Brown Guedira, G.L. 2007. Progress in Development and MAS of FHB Resistant Wheat Cultivars and Germplasm at Virginia Tech. National Fusarium Head Blight Forum Proceedings. Interpretive Summary: N/A
Technical Abstract: To accelerate development of high yielding, FHB resistant SRW wheat lines, we have deployed a combination of top-cross, double haploid, backcross and marker assisted breeding methods. During the 2006 crop year, molecular markers linked to FHB resistance QTL located on wheat chromosomes 3BS, 5AS, 3AS, and 6B were used in haplotype analysis of FHB resistance in 56 wheat parents, 120 three-way F1 progeny, 83 BC1F1 progeny, and 145 wheat lines in the 2006 VT FHB Advanced and Preliminary Test. Elite wheat lines having known haplotypes for target marker alleles of validated FHB QTL provide breeding programs with not only a unique source of adapted FHB resistant parents, but also knowledge of selectable markers that can be used to transfer and pyramid such QTL. Haplotyping of parental and advanced lines for known FHB QTL markers is an effective and complementary strategy to phenotypic selection for FHB resistance and, therefore, can be used to accelerate cultivar development. VA02W-713, a top-cross (Ning7840/Pionner2691/Roane) derived elite FHB resistant SWR wheat line, ranked 1st in grain yield (77 Bu/Ac) among 54 entries in theVirginia Advanced Wheat Test over three locations in 2004. This line also performed well in the Virginia 2005 and 2006 State Variety Trials at six locations and ranked 10th out of 45 entries in the 2006 USDA-ARS Union Southern SRW Wheat Nursery over 21 state locations in 2006. Breeder seed of this line is being developed in anticipation of cultivar release in 2008. This line has high grain yield and good FHB resistance with target alleles from markers Xrwm493 on 3BS, Xbarc45 and Xgwm674 on 3AS, and Xgwm508 on 6BS. An additional five lines VA04W-389, VA04W-433, VA04W-474, VA04W-571, and VA04W-592 are potential germplasm releases having good FHB resistance with target marker alleles for at least two QTL on chromosomes 3BS, 5AS, 3AS, and 6B. We also identified two native sources (Massey and VA00W-38) having good FHB resistance with target marker alleles in at least two QTL regions. These and other VT FHB resistant lines are being used as parents in several breeding programs and in pyramiding multiple QTL in adapted wheat backgrounds in our breeding program.