Submitted to: National Fusarium Head Blight Forum Proceedings
Publication Type: Abstract Only
Publication Acceptance Date: 11/5/2005
Publication Date: 12/11/2005
Citation: Johnson, J., Chen, Z., Kim, W., Seo, Y., Wang, M.L. 2005. Marker assisted selection for fhb resistance in soft red wheat from double haploid populations. National Fusarium Head Blight Forum Proceedings, Dec 11-13, 2005. Interpretive Summary:
Technical Abstract: Fusarium head blight (FHB) is caused by Fusarium graminearum Schwabe. The fungus can degenerate the wheat grain tissue and produce deoxynivalenol (DON) which is toxic to both human and animals. Epidemics of FHB can result in severe loss of yield and grain quality. Cultural or/and chemical control of FHB is difficult because infection of FHB occurs during the time of flowering. Release of FHB resistant cultivars is the most effective option to control incidence of FHB. In the southeast region of the US, resistance to FHB in local adaptive soft red winter wheat is limited. Introduction of resistant genes from exotic sources could enhance the resistance of local adaptive germplasm. A Virginia line, VA01W-476, which have the most widely used major QTLs on chromosome 2A, 3B and 5 A for FHB resistance, was used as donor parent in our program. A total of 47 double haploid individuals were generated from backcross F1 plants induced with maize pollen. Screening with SSR markers indicated the integration of novel FHB resistant QTLs on 3BS, 5AL from donor parents and native adaptive gene pool of ASG2000 and its derivatives. Two double haploid plants from backcross of VA01W-476/GA98186 and four double haploid plants from backcross of VA01W-476/AG2485 were identified to have VA01W-476/W14 type QTLs on 3BS and 5AL. Further evaluation for agronomic traits is under investigation.