http://http://dspace.unitus.it:80 The DSpace digital repository system captures, stores, indexes, preserves, and distributes digital research material. 2013-05-23T23:31:39Z http://hdl.handle.net/2067/1836 Title: Pyramiding different alien chromosome segments in durum wheat: feasibility and breeding potential Authors: Gennaro, Andrea; Forte, Paola; Carozza, Roberta; Savo Sardaro, Luisa Maria; Ferri, Daniela; Bitti, Alessandra; Borrelli, Grazia Maria; D'Egidio, Maria Grazia; Ceoloni, Carla Abstract: Wheat chromosome engineering, i.e. the transfer of alien chromosome segments from various Triticeae species into cultivated wheats, is greatly benefiting from the recent advancements in molecular genetics, cytogenetics and genomics. Powerful tools are currently available that make selection of desired genotypes far more precise and effective than in the past, thus giving this transfer strategy considerable potential for meaningful practical achievements. The paper describes the pyramiding of various disease resistance and quality-related genes, originating from different alien species, into durum wheat. Description: L'articolo é disponibile sul sito dell'editore: http://www.sciencefromisrael.com 2006-12-31T23:00:00Z http://hdl.handle.net/2067/1837 Title: Segregation distortion following introgression of Thinopyrum ponticum into durum wheat. Authors: Grossi, Rosaria; Gennaro, Andrea; Forte, Paola; Bitti, Alessandra; Ceoloni, Carla Abstract: Segregation distortion (SD) has been observed in a wide variety of organisms, including fungi, plants, insects, and mammals. In plants, genomic regions harboring markers with abnormal segregation ratios have been reported in many crop species, including barley, pearl millet, tomato, rice, maize and wheat. Chromosomes carrying Sd genes have been also identified in several wild wheat relatives and their effect revealed upon hybridization with wheat. The case-study of this research concerns one or more Sd genes present on the long arm of 7Ag (7AgL) chromosome of the wild wheatgrass species Thinopyrum ponticum, which, once transferred in association with desirable genes into wheat chromosomes, negatively affect their segregation and also alter some phenotypic plant traits. 2008-12-31T23:00:00Z http://hdl.handle.net/2067/1851 Title: Pyramiding into durum and bread wheat fusarium head blight resistance and other useful traits from Thinopyrum ponticum. Authors: Kuzmanović, Ljiljana; Gennaro, Andrea; Bitti, Alessandra; Ceoloni, Carla Abstract: In recent years, Fusarium Head Blight (FHB) has become a serious problem in wheat cultivation even in areas where it was not previously present, Italy included. The severity of disease impact on grain quality and yield, and the lack of resistant cultivars within adapted germplasm, stimulated worldwide breeding efforts to develop FHB resistant wheats. In order to exploit the available genetic variability of wheat relatives, we used the wild species Thinopyrum ponticum as a source of FHB resistance to be introduced into bread and durum wheats. The ultimate goal is to pyramid the FHB resistance gene(s) with other useful genes already transferred from a different accession of the same species (Lr19+Yp, leaf rust resistance and yellow endosperm pigmentation, respectively). To this aim, suitable polymorphic DNA markers have been identified in the region of interest which facilitate the follow-up of desired alleles in the course of the multi-targeted transfer process. 2008-12-31T23:00:00Z http://hdl.handle.net/2067/1778 Title: Genetic and cytogenetic maps of durum wheat-Thinopyrum ponticum recombinant chromosomes: a tool to finely describe Triticeae 7L arms and to target alien traits. Authors: Gennaro, Andrea; Kuzmanović, Ljiljana; Forte, Paola; Lattanzi, Gionata; Grossi, Rosaria; Bitti, Alessandra; Giorgi, Debora; Ceoloni, Carla Abstract: As one important result of wheat chromosome engineering, creation of arrays of wheat-alien recombinant chromosomes allows assignment of markers and genes to defined physical locations, hence improving knowledge of structural-functional organization of wheat and alien chromosomal regions. In this research we have exploited several durum wheat-Thinopyrum ponticum recombinant lines carrying relevant genes for wheat improvement. 2009-12-31T23:00:00Z http://hdl.handle.net/2067/1854 Title: Durum wheat-Thinopyrum ponticum recombinant lines: a tool to finely describe homoeologous 7L arm regions. Authors: Gennaro, Andrea; Kuzmanović, Ljiljana; Giorgi, Debora; Grossi, Rosaria; Bitti, Alessandra; Quarrie, Steve A.; Ceoloni, Carla Abstract: As one important result of wheat chromosome engineering, creation of arrays of wheat-alien recombinant chromosomes allows assignment of markers and genes to defined physical locations, hence improving knowledge of structural-functional organization of wheat and alien chromosomal regions and to identify suitable markers for MAS of target genes. Regions involved in our research are the distal portions of wheat 7AL and Thinopyrum ponticum (tall wheatgrass, a wild wheat relative) 7AgL arms, the latter containing several genes of value for wheat improvement. 2009-12-31T23:00:00Z