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Research Project: Genetic Analysis of Complex Traits in Maize

Location: Plant Science Research

Title: Fine mapping of a quantitative resistance gene for gray leaf spot of maize (Zea mays L.) derived from teosinte (Z. mays ssp. parviglumis)

Author
item Zhang, Xinye - North Carolina State University
item Yang, Qin - North Carolina State University
item Rucker, Elizabeth - Virginia Polytechnic Institution & State University
item Thomason, Wade - Virginia Polytechnic Institution & State University
item Balint-kurti, Peter

Submitted to: Theoretical and Applied Genetics
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 2/27/2017
Publication Date: 3/24/2017
Citation: Zhang, X., Yang, Q., Rucker, E., Thomason, W., Balint Kurti, P.J. 2017. Fine mapping of a quantitative resistance gene for gray leaf spot of maize (Zea mays L.) derived from teosinte (Z. mays ssp. parviglumis). Theoretical and Applied Genetics. 130(6):1285-1295.

Interpretive Summary: In this paper we have precisely located a maize gene conferring resistance to the fungal disease gray leaf spot to a small region of the genome containing only five genes.

Technical Abstract: In previous work, using near isogenic line (NIL) populations in which segments of the tesosinte (Zea mays ssp. parviglumis) genome had been introgressed into the background of the maize line B73, we had identified a QTL on chromosome 8, here called Qgls8, for gray leaf spot resistance. We identified alternate teosinte alleles at this QTL, one conferring increased GLS resistance and one increased susceptibility relative to the B73 allele. Using segregating populations derived from NIL parents carrying these contrasting alleles, we were able to delimit the QTL region to a ~130 kb (based on the B73 genome) which encompassed five predicted genes.