Tesi etd-10052025-154053
Link copiato negli appunti
Tipo di tesi
Corso Ordinario Secondo Livello
Autore
COZZI, ALICE
URN
etd-10052025-154053
Titolo
Population Structure and Genetic Mapping of Fusarium Head Blight Resistance in Hexaploid Wheat
Struttura
Classe Scienze Sperimentali
Corso di studi
SCIENZE AGRARIE E BIOTECNOLOGIE - SCIENZE AGRARIE E BIOTECNOLOGIE
Commissione
Tutor Prof.ssa PUCCIARIELLO, CHIARA
Presidente Prof. BARBERI, PAOLO
Membro Dott. CAPRONI, LEONARDO
Membro Dott. CARLESI, STEFANO
Membro Prof.ssa MOONEN, ANNA CAMILLA
Relatore Prof. Buerstmayr, Hermann
Presidente Prof. BARBERI, PAOLO
Membro Dott. CAPRONI, LEONARDO
Membro Dott. CARLESI, STEFANO
Membro Prof.ssa MOONEN, ANNA CAMILLA
Relatore Prof. Buerstmayr, Hermann
Parole chiave
- Fusarium
- Hexaploid wheat
- Multi-trait selection
- plant breeding
Data inizio appello
11/12/2025;
Disponibilità
parziale
Riassunto analitico
Wheat provides approximately 20% of all calories in the human diet, underpinning global food security. Despite its broad adaptability, genetic bottlenecks associated with polyploid speciation, together with selection of high-yielding varieties and the application of management techniques developed during the Green Revolution, have led to genetic erosion and increased vulnerability to abiotic and biotic stresses. Fusarium Head Blight (FHB) was first described in England in 1884, but it has recently re-emerged as a major threat, reducing both yield and grain quality through mycotoxin contamination. As fungicides alone are insufficient, effective management strategies require the integration of cultural, biological, and chemical control strategies, combined with the cultivation of specific resistant cultivars.
This study analyses 229 lines of hexaploid wheat (Triticum aestivum ssp. Aestivum) from five biparental populations previously selected for FHB resistance under artificial inoculation, with the aim of identifying genomic regions showing shifts in allele frequencies attributable to artificial selection pressure. First, we conducted a phenotypic analysis to quantify FHB resistance in the wheat lines relative to their respective parents. Next, we implemented a comprehensive genotypic workflow comprehending the construction of a genetic linkage map, followed by analyses of allele frequency changes. Collectively, this framework is designed to reveal genomic regions associated with FHB resistance and to inform marker-assisted strategies for stacking favorable alleles in breeding programs.
This study analyses 229 lines of hexaploid wheat (Triticum aestivum ssp. Aestivum) from five biparental populations previously selected for FHB resistance under artificial inoculation, with the aim of identifying genomic regions showing shifts in allele frequencies attributable to artificial selection pressure. First, we conducted a phenotypic analysis to quantify FHB resistance in the wheat lines relative to their respective parents. Next, we implemented a comprehensive genotypic workflow comprehending the construction of a genetic linkage map, followed by analyses of allele frequency changes. Collectively, this framework is designed to reveal genomic regions associated with FHB resistance and to inform marker-assisted strategies for stacking favorable alleles in breeding programs.
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