Fine mapping of a quantitative resistance gene for gray leaf spot of maize (<Emphasis Type="Italic">Zea mays</Emphasis> L.) derived from teosinte (<Emphasis Type="Italic">Z. mays</Emphasis> ssp. <Emphasis Type="Italic">parviglumis</Emphasis>) |
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| Authors: | Xinye Zhang Qin Yang Elizabeth Rucker Wade Thomason Peter Balint-Kurti |
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| Institution: | 1.Maize Research Institute,Sichuan Agricultural University,Chengdu,China;2.Department of Entomology and Plant Pathology,North Carolina State University,Raleigh,USA;3.Department of Crop and Soil Environmental Sciences,Virginia Tech,Blacksburg,USA;4.U.S. Department of Agriculture,Agricultural Research Service (USDA-ARS) Plant Science Research Unit,Raleigh,USA |
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| Abstract: | Key messageIn this study we mapped the QTL Qgls8 for gray leaf spot (GLS) resistance in maize to a ~130 kb region on chromosome 8 including five predicted genes.AbstractIn previous work, using near isogenic line (NIL) populations in which segments of the teosinte (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 (GLS) 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. |
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