title: Mapping QTLs forFusariumHead Blight Resistance in an Interspecific Wheat Population.
abstract: Fusariumhead blight (scab) is one of the most widespread and damaging diseases of wheat, causing grain yield and quality losses and production of harmful mycotoxins. Development of resistant varieties is hampered by lack of effective resistance sources in the tetraploid wheat primary gene pool. Here we dissected the genetic basis of resistance in a new durum wheat (Triticum turgidumssp.durum) Recombinant inbred lines (RILs) population obtained by crossing an hexaploid resistant line and a durum susceptible cultivar. A total of 135 RILs were used for constituting a genetic linkage map and mapping loci for head blight incidence, severity, and disease-related plant morphological traits (plant height, spike compactness, and awn length). The new genetic map accounted for 4,366 single nucleotide polymorphism markers assembled in 52 linkage groups covering a total length of 4,227.37 cM. Major quantitative trait loci (QTL) for scab incidence and severity were mapped on chromosomes 2AS, 3AL, and 2AS, 2BS, 4BL, respectively. Plant height loci were identified on 3A, 3B, and 4B, while major QTL for ear compactness were found on 4A, 5A, 5B, 6A, and 7A. In this work, resistance toFusariumwas transferred from hexaploid to durum wheat, and correlations between the disease and morphological traits were assessed.
authors.affiliation: Department of Agricultural and Environmental Sciences, Research Unit of "Genetics and Plant Biotechnology", University of Bari Aldo Moro Bari, Italy.
authors.forename: Angelica
authors.initials: A
authors.lastname: Giancaspro
authors.affiliation: Department of Agricultural and Environmental Sciences, Research Unit of "Genetics and Plant Biotechnology", University of Bari Aldo Moro Bari, Italy.
authors.forename: Stefania L
authors.initials: SL
authors.lastname: Giove
authors.affiliation: Department of Soil, Plant and Food Sciences, Section of Genetics and Plant Breeding, University of Bari Aldo Moro Bari, Italy.
authors.forename: Daniela
authors.initials: D
authors.lastname: Zito
authors.affiliation: Department of Soil, Plant and Food Sciences, Section of Genetics and Plant Breeding, University of Bari Aldo Moro Bari, Italy.
authors.forename: A
authors.initials: A
authors.lastname: Blanco
authors.affiliation: Department of Agricultural and Environmental Sciences, Research Unit of "Genetics and Plant Biotechnology", University of Bari Aldo Moro Bari, Italy.
authors.forename: Agata
authors.initials: A
authors.lastname: Gadaleta
keywords: FHB resistance; QTL analysis; SNP markers; durum wheat; genetic map