Genetic architecture of resistance to Septoria tritici blotch in European wheat

BMC Genomics

Research Article

Yusheng Zhao¹  Jochen C Reif¹  Erhard Ebmeyer²  Viktor Korzun²  Ebrahim Kazman³  Manje Gowda⁴  C Friedrich H Longin⁴  Thomas Miedaner⁴ 

[1] Department of Cytogenetics and Genome Analysis, Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), Gatersleben, Germany;KWS LOCHOW GMBH, 29296, Bergen, Germany;Lantmännen SW Seed Hadmersleben GmbH, 39398, Hadmersleben, Germany;State Plant Breeding Institute, University of Hohenheim, 70593, Stuttgart, Germany;

关键词: Association mapping;    Genomic selection;    Hybrid wheat;    Mycosphaerella graminicola;    Septoria tritici;   

DOI  :  10.1186/1471-2164-14-858

 received in 2013-03-19, accepted in 2013-11-28,  发布年份 2013

来源: Springer

【 摘 要 】

BackgroundSeptoria tritici blotch is an important leaf disease of European winter wheat. In our survey, we analyzed Septoria tritici blotch resistance in field trials with a large population of 1,055 elite hybrids and their 87 parental lines. Entries were fingerprinted with the 9 k SNP array. The accuracy of prediction of Septoria tritici blotch resistance achieved with different genome-wide mapping approaches was evaluated based on robust cross validation scenarios.ResultsSeptoria tritici blotch disease severities were normally distributed, with genotypic variation being significantly (P < 0.01) larger than zero. The cross validation study revealed an absence of large effect QTL for additive and dominance effects. Application of genomic selection approaches particularly designed to tackle complex agronomic traits allowed to double the accuracy of prediction of Septoria tritici blotch resistance compared to calculation methods suited to detect QTL with large effects.ConclusionsOur study revealed that Septoria tritici blotch resistance in European winter wheat is controlled by multiple loci with small effect size. This suggests that the currently achieved level of resistance in this collection is likely to be durable, as involvement of a high number of genes in a resistance trait reduces the risk of the resistance to be overcome by specific pathogen isolates or races.

【 授权许可】

Unknown   
© Miedaner et al.; licensee BioMed Central Ltd. 2013. This article is published under license to BioMed Central Ltd. This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.