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Validation of Quantitative Trait Loci for Multiple Disease Resistance in Barley Using Advanced Backcross Lines Developed with a Wild Barley

^a Division of Biological Resources Sciences, Chonbuk National Univ., Jeonju 561-756, Korea
^b Dep. of Agronomy and Plant Genetics, Univ. of Minnesota, St. Paul, MN 55108
^c Dep. of Plant Pathology, Univ. of Minnesota, St. Paul, MN 55108
^d Institute of Plant Biology, Univ. of Zurich, Zollikerstr. 107, CH-8008 Zurich, Switzerland
^e Dep. of Crop and Soil Science, Oregon State Univ., Corvallis, OR 97331-3002
^f INIA Quilamapu, Casilla 426, Chillan, Chile
^g Dep. of Agroenvironmental Sciences and Technology, Univ. of Bologna, Viale Fanin 44, 40137 Bologna, Italy

View larger version (70K): [in a new window]   Fig. 1. Graphical genotypes of the seven barley chromosomes [chromosomes 1(7H) to 7(5H) from top to bottom] of 98 advanced backcross lines (lines 1 to 98 from left to right). Marker locations were based on the map positions from the OUH602/Harrington recombinant inbred line population (Yun et al., 2005). Advance backcross lines L22 and L84 have 28 and 0% introgressed donor fragments, respectively. The Harrington genome is shown in yellow, the OUH602 genome is in blue, heterozygotes are in red, and missing data are in white.

View larger version (24K): [in a new window]   Fig. 2. Resistance QTLs for spot blotch (Rcs), net type net blotch (Rpt), Septoria speckled leaf blotch (Rsp), and leaf scald (Rrs) detected in the advanced backcross (AB, open bar) and recombinant inbred line (RIL, closed bar) populations of OUH602/Harrington. Marker locations were based on the map positions from the OUH602/Harrington RIL population (Yun et al., 2005). The QTL detected only in the AB population is underlined and the QTL detected only in the RIL population is designated with an asterisk. No QTL were detected on chromosome 7(5H).