Genetic architecture is more complex for resistance to Septoria tritici blotch than to Fusarium head blight in Central European winter wheat

BMC Genomics

Jochen C. Reif²  Michael Florian Mette²  Manje Gowda¹  C. Friedrich H. Longin³  Thomas Miedaner³  Yusheng Zhao²  Guozheng Liu²  Vilson Mirdita² 

[1] International Maize and Wheat Improvement Center (CIMMYT), Nairobi, Kenya;Department of Cytogenetics and Genome Analysis, Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), Gatersleben, 06466, Germany;State Plant Breeding Institute, University of Hohenheim, Stuttgart, 70593, Germany

关键词: Septoria tritici blotch;    Fusarium head blight;    Hybrid wheat;    Genomic selection;    Association mapping;   

Others  :  1211972
DOI  :  10.1186/s12864-015-1628-8

 received in 2015-01-07, accepted in 2015-05-11,  发布年份 2015

【 摘 要 】

Background

Fusarium head blight (FHB) and Septoria tritici blotch (STB) severely impair wheat production. With the aim to further elucidate the genetic architecture underlying FHB and STB resistance, we phenotyped 1604 European wheat hybrids and their 135 parental lines for FHB and STB disease severities and determined genotypes at 17,372 single-nucleotide polymorphic loci.

Results

Cross-validated association mapping revealed the absence of large effect QTL for both traits. Genomic selection showed a three times higher prediction accuracy for FHB than STB disease severity for test sets largely unrelated to the training sets.

Conclusions

Our findings suggest that the genetic architecture is less complex and, hence, can be more properly tackled to perform accurate prediction for FHB than STB disease severity. Consequently, FHB disease severity is an interesting model trait to fine-tune genomic selection models exploiting beyond relatedness also knowledge of the genetic architecture.

【 授权许可】

   
2015 Mirdita et al.

【 图 表 】

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