Submitted to: American Society of Agronomy Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 7/30/2005
Publication Date: 11/6/2005
Citation: Chen, Z., Johnson, J., Bland, D., Wang, M.L. 2005. Pyramiding genes for coliar disease resistance in red soft winter wheat using dna marker assisted selection (mas). In: Proceedings of the ASA-CSSA-SSSA Annual Meeting, November 6-10, 2005, Salt Lake City, UT. 2005 CDROM. Interpretive Summary:
Technical Abstract: Foliar disease, such as leaf rust (Puccinia recondita f. sp. tritici) and stripe rust (Puccinia striiformis f. sp. tritici) have been important factors limiting wheat production in Georgia and other southeast states. Planting resistant varieties are the most effective and economical approach to control foliar diseases in wheat production. From literature, it has been well known that single and/or major genes usually have significant effect on the resistance to wheat leaf rust and stripe rust. The life time to a newly released resistant cultivar with single resistant gene can be reduced by the frequent shift of dominant race of pathogens. Pyramiding of leaf rust and stripe rust resistant genes into one genetic background could overcome the frequent changing of pathogen races and potentially reduce the risk of incidence of diseases. Molecular marker assisted selection made it practical for us to pyramid resistant genes into a local adaptive genotype with desired agronomical and economical traits. Here we reported the progress on pyramiding of Lr21, Lr34, Lr37, Yr5, Yr15, and Yr26 into the genetic background of red soft winter wheat AGS2000 using marker assisted selection in the backcross breeding program.