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

摘要: Fusarium head blight (FHB) and Septoria tritici blotch (STB) severely impair wheat production. With the aim to further elucidate genetic architecture underlying FHB STB resistance, we phenotyped 1604 European hybrids their 135 parental lines for disease severities determined genotypes at 17,372 single-nucleotide polymorphic loci. Cross-validated association mapping revealed absence of large effect QTL both traits. Genomic selection showed a three times higher prediction accuracy than severity test sets largely unrelated training sets. Our findings suggest that is less complex and, hence, can be more properly tackled perform accurate severity. Consequently, an interesting model trait fine-tune genomic models exploiting beyond relatedness also knowledge architecture.