Abstract
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.
Original language | English (US) |
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Article number | 430 |
Journal | BMC genomics |
Volume | 16 |
Issue number | 1 |
DOIs | |
State | Published - Jun 5 2015 |
Bibliographical note
Publisher Copyright:© 2015 Mirdita et al.
Keywords
- Association mapping
- Fusarium head blight
- Genomic selection
- Hybrid wheat
- Septoria tritici blotch
ASJC Scopus subject areas
- Biotechnology
- Genetics