Publications by authors named "Andreas Jacobi"
The genetics underlying heterosis, the difference in performance of crosses compared with midparents, is hypothesized to vary with relatedness between parents. We established a unique germplasm comprising three hybrid wheat sets differing in the degree of divergence between parents and devised a genetic distance measure giving weight to heterotic loci. Heterosis increased steadily with heterotic genetic distance for all 1903 hybrids.
View Article and Find Full Text PDFAbout 10% of cultivars possessed superior resistance to four fungal diseases and association mapping for multiple disease resistance identified loci which are not detected by analyzing individual disease resistances. Multiple disease resistance (MDR) aims for cultivars that are resistant to more than one disease which is an important prerequisite for the registration of commercial cultivars. We analyzed a European winter wheat diversity panel of 158 old and new cultivars for four diseases by natural (powdery mildew) and artificial inoculation (yellow rust, stem rust, Fusarium head blight) observed on the same plot in a multilocation trial.
View Article and Find Full Text PDFArticle Synopsis
- - Powdery mildew (PM) is a major disease affecting wheat worldwide, and existing resistance genes in wheat can quickly become ineffective against evolving pathogen races, highlighting the need for new resistance sources.
- - The study identified a new PM resistance gene called Pm46 in the German wheat cultivar Tabasco. This gene is located on the short arm of chromosome 5D and provides strong resistance to various strains of the pathogen.
- - Testing showed that Pm46 is distinct from another resistance gene, Pm2, as they do not share allelic relationships, confirming that Pm46 represents a valuable addition to wheat breeding programs for enhancing resistance to PM.