Submitted to: International Wheat Conference Proceedings
Publication Type: Abstract only
Publication Acceptance Date: 10/20/2005
Publication Date: 11/27/2005
Citation: Johnson, J., Chen, Z., Kim, W., Wang, M.L., Seo, Y. 2005. Marker assisted selection for fusarium resistance in wheat from double haploid populations. 7th International Wheat Conference Proceedings, Nov 27 - Dec 2, 2005, Mar Del Plata, Argentina. 2005 CDROM. 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. Two Virginia line, VA01W-476 and VAW-461, which have the most widely used major QTLs on chromosome 2A, 3B and 5 A for FHB resistance, were used as donor parents in our program. A total of 146 double haploid individuals and 28 backcross progenies were screened with SSR markers, indicating the integration of novel FHB resistant QTLs on 3B, 5A and 2A from donor parents and native adaptive gene pool of ASG2000. 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. Three backcross progenies showed the genotype of VA01W-461 for FHB resistant QTLs. Further evaluation for agronomic traits is under investigation.