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Título : Resistance to powdery mildew in Spanish barley landraces is controlled by different sets of quantitative trait loci
Autor : Silvar Casao, Cristina ; Casas Cendoya, Ana María ; Igartua Arregui, Ernesto ; Ponce Molina, Luis Jonatan ; Gracia Gimeno, María Pilar ; Schweizer, Günther; Herz, Markus; Flath, Kerstin; Waugh, Robbie; Kopahnke, Doris; Odón, F.
Palabras clave : barley
powdery mildew
disease resistance
quantitative trait locus
landrace
Fecha de publicación : oct-2011
Editor: Springer
Citación : Silvar C, Casas AM, Igartua E, Ponce-Molina LJ, Gracia MP, Schweizer G, Herz M, Flath K, Waugh R, Kopahnke D, Odón F. Resistance to powdery mildew in Spanish barley landraces is controlled by different sets of quantitative trait loci. Theroretical and applied genetics 123 (6): 1019-1028 (2011)
Resumen: Twenty-two landrace-derived inbred lines from the Spanish Barley Core Collection (SBCC) were found to display high levels of resistance to a panel of 27 isolates of the fungus Blumeria graminis that exhibit a wide variety of virulences. Among these lines, SBCC145 showed high overall resistance and a distinctive spectrum of resistance compared with the other lines. Against this background, the main goal of the present work was to investigate the genetic basis underlying such resistance using a doubled haploid population derived from a cross between SBCC145 and the elite spring cultivar Beatrix. The population was genotyped with the 1,536-SNP Illumina GoldenGate Oligonucleotide Pool Assay (Barley OPA-1 or BOPA1 for short), whereas phenotypic analysis was performed using two B. graminis isolates. A major quantitative trait locus (QTL) for resistance to both isolates was identified on the long arm of chromosome 6H (6HL) and accounted for ca. 60% of the phenotypic variance. Depending on the B. graminis isolate tested, three other minor QTLs were detected on chromosomes 2H and 7H, which explained less than 5% of the phenotypic variation each. In all cases, the alleles for resistance derived from the Spanish parent SBCC145. The position, the magnitude of the effect observed and the proportion of phenotypic variation accounted for by the QTL on 6HL suggest this is a newly identified locus for broad-based resistance to powdery mildew.
Descripción : 25 Pag., 2 Tabl., 3 Fig. The definitive version is available at: http://www.springerlink.com/content/0040-5752/
Versión del editor: http://dx.doi.org/10.1007/s00122-011-1644-2
URI : http://hdl.handle.net/10261/43454
DOI: 10.1007/s00122-011-1644-2
ISSN: 0040-5752
E-ISSN: 1432-2242
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