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The high carotenoid content and distinctive carotenoid profile of tritordeum are conferred by its wild progenitor, Hordeum chilense. Genetic studies on this wild barley could exploit the knowledge gained in Hordeum vulgare L. if the synteny between H. vulgare and H. chilense is established. DArTSeq markers were aligned to barley genome and used to inspect H. chilense-barley synteny. All chromosome...
Fatty acids are the main components of the olive oil and their composition has a critical influence on the oil quality. However, oil quality evaluation has not been frequently included in the selection of new bred cultivars. This can be due to the difficulties in analyzing oil quality in large set of genotypes and also to the long juvenile period of olive seedlings. Therefore, the identification of...
Increasing biomass accumulation is becoming a major objective of most bread wheat ( Triticum aestivum L.) breeding programs worldwide. This study addresses the changes caused by breeding in the pattern of wheat growth and its relationship with the presence of Rht dwarfing alleles. A historical series of 16 varieties representative of the most widely grown during the...
Two key quality traits in milling wheat are flour yield (FY) and water absorption (WA). Ideally, breeders would prefer to use markers to select promising lines rather than time consuming rheology tests. In this study, we measured FY and WA on a wheat mapping population (Lang/QT8766) of 162 individuals grown in two replicated field experiments at three locations over 2 years. We also carried out near...
Triticum turgidum ssp. durum (tetraploid durum) germplasm is very susceptible to crown rot, caused by the fungus Fusarium pseudograminearum. Screening activities to date have failed to identify even moderately susceptible lines. In contrast partial resistance to this disease has been identified in a number of Triticum aestivum (hexaploid wheat) lines, including 2-49 and Sunco. This study...
In greenhouse studies of three alloplasmic wheat series, plant height, flowering date and yield per plant were least affected when the native cytoplasm was replaced by donor cytoplasm of the Triticum–Aegilops complex than when replaced by Hordeum chilense cytoplasm. On the other hand, significant differences for seed lutein content were found between euplasmic controls and their respective alloplasmic...
Triticum urartu is a wild diploid wheat that has been identified as the donor of the A genome in polyploid wheats. The gliadins of this species were analysed by acid-PAGE in accessions from Armenia, Iran, Iraq, Lebanon, former-Soviet Union and Turkey. Up to twenty-six different alleles for each locus (Gli-Au1 and Gli-Au2) implicated in the synthesis of these proteins, were found. The genetic...
×Tritordeum (Ascherson et Graebner, an amphiploid between Triticum turgidum conv. durum and Hordeum chilense), and chromosome substitution lines of tritordeum where chromosomes 2 Hch or 3 HchH. chilense were replaced with chromosome 2 D of T. aestivum or 3 Hv chromosome of H. vulgare, respectively, were used to assess the effect of specific chromosomes on the rachis. ×Tritordeum has brittle rachis...
Yield and its components (stem-, leaf- and top-yield) were analyzed in a population derived from the cross between F1.1 andF1.7 entries of Miscanthus sinensisAnders. Both lines are offspring of the cross between MS-90-2 and MS-88-110. The aim of this work was to identify QTLs for yield and its components suitable to develop a Marker Aided Selection (MAS) program in M. sinensis.QTL analyses were performed...
Eighty-one different lines of Hordeum chilense Roem. et Schult., representative of its distribution area, were analysed. Homozygotic genotypes were obtained by at least two generations of self-pollination. The homogeneity of the progeny was tested by using nine seeds from three different plants. The LMW gluten in subunits were studied using the SDS-PAGE technique. The variability within the entire...
Septoria leaf blotch and common bunt are important diseases of wheat to which Hordeum vulgare is resistant. Addition lines of H. vulgare in wheat were utilized to determine which H. vulgare chromosomes carry resistance genes. Resistance to septoria leaf blotch was conferred by gene(s) present all over the barley genome, but more strongly by those located on chromosomes 7 and 4. Almost complete resistance...
Hordeum chilense exhibits resistance to Septoria tritici. Addition and substitution lines of H. chilensein wheat were utilized in growth chamber and field experiments to determine which H. chilense chromosomes carry resistance genes. Resistance is conferred by gene(s) on chromosome 4 and, to a minor extent, by genes on chromosomes 5, 6 and 7.
Hordeum chilense is a wild barley species that has a high degree of genetic variability and significant potential for use in plant breeding. To establish a series of trisomics in H. chilense (2n = 14), plants with 2n + 1 chromosome numbers were isolated from the progenies of selfed triploid plants. Based on both fluorescent in situ hybridization with pAs1 and pTa71 repetitive DNA probes and C-banding...
Hordeum chilense is resistant to common bunt. Addition lines of H. chilense in wheat were utilized in field experiments to determine which H. chilense chromosomes carry resistance genes. Resistance is conferred by gene(s) on chromosome 7 and to a minor extent by such on chromosome 6 of H. chilense. Expression of resistance was quantitative.
Hexaploid tritordeum is an amphiploid derived from the cross between Hordeum chilense and durum wheat. This amphiploid has shown potential for bread making, which has been associated to the prolamins from H. chilense. The role of each prolamin subunit on the gluten strength in tritordeum has been evaluated. Advanced progenies from two hexaploid tritordeum crosses were analysed for prolamins composition...
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