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Title: Mapping QTL controlling southern leaf blight resistance by joint analysis of three related recombinant inbred line populations

Author
item NAGERI, ADISU - North Carolina State University
item COLES, NATHAN - Pioneer Hi-Bred International
item Holland, Jim - Jim
item Balint-Kurti, Peter

Submitted to: Crop Science
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 2/25/2011
Publication Date: 7/1/2011
Citation: Nageri, A., Coles, N., Holland, J.B., Balint Kurti, P.J. 2011. Mapping QTL controlling southern leaf blight resistance by joint analysis of three related recombinant inbred line populations. Crop Science. 51(4):1571-1579.

Interpretive Summary: We report the positions and effects of several loci conferring resistance to southern leaf blight disease of corn.

Technical Abstract: Quantitative trait loci (QTL) for resistance to southern leaf blight (SLB) disease caused by Cochliobolus heterostrophus race O were identified in three maize recombinant inbred populations assed in two environments. Each population derived from a cross between a temperate and a tropical maize line. QTL were identified by separate analysis of each population and by joint analysis of the populations. The most important QTL identified were on chromosomes 3, 8, 9 and 10. Joint analysis led to more precise position estimates than separate analysis for each QTL. Results are discussed in the context of previous SLB QTL analysis studies and a recent flowering time QTL study that used the same populations.