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Genetic architecture of resistance to Septoria tritici blotch in European wheat.
BMC Genomics. 2013 Dec 05; 14:858.BG

Abstract

BACKGROUND

Septoria 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.

RESULTS

Septoria 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.

CONCLUSIONS

Our 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.

Authors+Show Affiliations

Department of Cytogenetics and Genome Analysis, Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), Gatersleben, Germany. reif@ipk-gatersleben.de.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

24308379

Citation

Miedaner, Thomas, et al. "Genetic Architecture of Resistance to Septoria Tritici Blotch in European Wheat." BMC Genomics, vol. 14, 2013, p. 858.
Miedaner T, Zhao Y, Gowda M, et al. Genetic architecture of resistance to Septoria tritici blotch in European wheat. BMC Genomics. 2013;14:858.
Miedaner, T., Zhao, Y., Gowda, M., Longin, C. F., Korzun, V., Ebmeyer, E., Kazman, E., & Reif, J. C. (2013). Genetic architecture of resistance to Septoria tritici blotch in European wheat. BMC Genomics, 14, 858. https://doi.org/10.1186/1471-2164-14-858
Miedaner T, et al. Genetic Architecture of Resistance to Septoria Tritici Blotch in European Wheat. BMC Genomics. 2013 Dec 5;14:858. PubMed PMID: 24308379.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Genetic architecture of resistance to Septoria tritici blotch in European wheat. AU - Miedaner,Thomas, AU - Zhao,Yusheng, AU - Gowda,Manje, AU - Longin,C Friedrich H, AU - Korzun,Viktor, AU - Ebmeyer,Erhard, AU - Kazman,Ebrahim, AU - Reif,Jochen C, Y1 - 2013/12/05/ PY - 2013/03/19/received PY - 2013/11/28/accepted PY - 2013/12/7/entrez PY - 2013/12/7/pubmed PY - 2014/3/8/medline SP - 858 EP - 858 JF - BMC genomics JO - BMC Genomics VL - 14 N2 - BACKGROUND: Septoria 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. RESULTS: Septoria 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. CONCLUSIONS: Our 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. SN - 1471-2164 UR - https://www.unboundmedicine.com/medline/citation/24308379/Genetic_architecture_of_resistance_to_Septoria_tritici_blotch_in_European_wheat_ L2 - https://bmcgenomics.biomedcentral.com/articles/10.1186/1471-2164-14-858 DB - PRIME DP - Unbound Medicine ER -