Person: Yahyaoui, A.
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Yahyaoui
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Yahyaoui, A.
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- Genome-wide association analysis of tan spot disease resistance in durum wheat accessions from Tunisia(Frontiers Media S.A., 2023) Laribi, M.; Fredua-Agyeman, R.; Ben M’Barek, S.; Sansaloni, C.; Dreisigacker, S.; Gamba, F.M.; Abdedayem, W.; Nefzaoui, M.; Araar, C.; Sheau-Fang Hwang; Yahyaoui, A.; Strelkov, S.E.
Publication - Phenotyping mediterranean durum wheat landraces for resistance to zymoseptoria tritici in Tunisia(MDPI, 2022) Ben M’Barek, S.; Laribi, M.; Kouki, H.; Castillo, D.; Araar, C.; Nefzaoui, M.; Ammar, K.; Saint Pierre, C.; Yahyaoui, A.
Publication - Characterization of Mediterranean durum wheat for resistance to Pyrenophora tritici-repentis(MDPI, 2022) Laribi, M.; Yahyaoui, A.; Abdedayem, W.; Kouki, H.; Sassi, K.; Ben M’Barek, S.
Publication - Durum wheat mediterranean landraces: a valuable source for resistance to tan spot disease(MDPI, 2021) Laribi, M.; Ben M’Barek, S.; Fakhfakh, M.; Yahyaoui, A.; Sassi, K.
Publication - Quantitative inheritance of resistance to Septoria Tritici Blotch in durum wheat in Tunisia(INIA, 2014) Berraies, S.; Ammar, K.; Gharbi, M.S.; Yahyaoui, A.; Rezgui, S.
Publication - Race structure and distribution of Pyrenophora tritici-repentis in Tunisia(Universitá Degli Studi Firenze, 2019) Laribi, M.; Gamba, F.M.; Hassine, M.; Singh, P.K.; Yahyaoui, A.; Sassi, K.
Publication - The use of pentaploid crosses for the introgression of Amblyopyrum muticum and D-genome chromosome segments into durum wheat(Frontiers, 2019) Othmeni, M.; Grewal, S.; Hubbart-Edwards, S.; Cai-Yun Yang; Scholefield, D.; Ashling, S.; Yahyaoui, A.; Gustafson, P.; Singh, P.K.; King, I.P.; King, J.The wild relatives of wheat provide an important source of genetic variation for wheat improvement. Much of the work in the past aimed at transferring genetic variation from wild relatives into wheat has relied on the exploitation of the ph1b mutant, located on the long arm of chromosome 5B. This mutation allows homologous recombination to occur between chromosomes from related but different genomes, e.g. between the chromosomes of wheat and related chromosomes from a wild relative resulting in the generation of interspecific recombinant chromosomes. However, the ph1b mutant also enables recombination to occur between the homologous genomes of wheat, e.g. A/B, A/D, B/D, resulting in the generation of wheat intergenomic recombinant chromosomes. In this work we report on the presence of wheat intergenomic recombinants in the genomic background of hexaploid wheat/Amblyopyrum muticum introgression lines. The transfer of genomic rearrangements involving the D-genome through pentaploid crosses provides a strategy by which the D-genome of wheat can be introgressed into durum wheat. Hence, a pentaploid crossing strategy was used to transfer D-genome segments, introgressed with either the A- and/or the B-genome, into the tetraploid background of two durum wheat genotypes Karim and Om Rabi 5 in either the presence or absence of different Am. muticum (2n = 2x = 14, TT) introgressions. Introgressions were monitored in backcross generations to the durum wheat parents via multi-color genomic in situ hybridization (mc-GISH). Tetraploid lines carrying homozygous D-genome introgressions, as well as simultaneous homozygous D- and T-genome introgressions, were developed. Introgression lines were characterized via Kompetitive Allele-Specific PCR (KASP) markers and multi-color fluorescence in situ hybridization (FISH). Results showed that new wheat sub-genomic translocations were generated at each generation in progeny that carried any Am. muticum chromosome introgression irrespective of the linkage group that the segment was derived from. The highest frequencies of homologous recombination were observed between the A- and the D-genomes. Results indicated that the genotype Karim had a higher tolerance to genomic rearrangements and T-genome introgressions compared to Om Rabi 5. This indicates the importance of the selection of the parental genotype when attempting to transfer/develop introgressions into durum wheat from pentaploid crosses.
Publication - Genetic analysis of morpho-physiological traits and yield components in F2 partial diallel crosses of bread wheat (Triticum aestivum L.)(Universidad Nacional de Colombia (Sede Medellín), 2017) Abidine Fellah, Z.E.; Hannachi, A.; Bouzerzour, H.; Dreisigacker, S.; Yahyaoui, A.; Sehgal, D.Wheat breeding in the semi-arid region of Algeria aims to develop new cultivars combining high productivity and good abiotic stress tolerance. Therefore, it is essential to understand the mode of gene effects implicated in the genetic control of these characteristics. Nine parents of bread wheat and twenty derived F2 hybrid populations developed in a partial diallel scheme were evaluated with three replications at the experimental site of the National Agronomic Research Institute of Algeria (INRAA), Setif unit, during the 2012-2013 crop season. Results of the diallel analysis, indicated that the components associated with additive effects were more relevant than those associated with the dominance effects for most of the studied traits. Based on the proportion between dominant and recessive genes in all parents, the dominant alleles were present in greater frequency in group 1. Values of the gene proportion with positive and negative effects in the parents revealed an unequal distribution of dominant genes in the parents for almost all the traits except for chlorophyll content and grain number per spike which showed a symmetric distribution. The average degree of dominance indicated over-dominance for most of traits, suggesting that selection for these traits, in early generation, will be less efficient.
Publication - High genetic diversity of Mycospaherella graminicola (Zymoseptoria tritici) from a single wheat field in Tunisia as revealed by SSR markers(Academic Journals, 2013) Berraies, S.; Gharbi, M.S.; Belzile, F.; Yahyaoui, A.; Hajlaoui, M.R.; Trifi, M.; Jean, M.; Rezgui, S.Microsatellite markers were used to assess genetic diversity of Mycosphaerella graminicola at a micro geographical scale in Tunisia. Forty five (45) isolates were sampled and assessed using seven pairs of single-locus microsatellite primers not previously tested on populations of M. graminicola in Tunisia. Genetic diversity of the field population ranged from 0.403 to 0.555 with an average of 0.484. A high level of genetic diversity was found at a sharp scale throughout the pathogen population tested. Among 45 isolates sampled, 39 different multi locus genotypes (MLG) were identified. Cluster analysis (UPGMA) showed that 86% of the isolates tested were distinct. The high degree of DNA polymorphism, the large number of different molecular genotypes and the pattern of cluster analysis suggest that sexual ascospores and/or asexual spores of a highly mutable local population could have contributed to the genetic diversity of M. graminicola in Tunisia.
Publication - Genetic diversity of Pyrenophora tritici-repentis in Algeria as revealed by amplified fragement length polymorphism (AFLP) analysis(Academic Journals, 2013) Benslimane, H.; Lababidi, S.; Yahyaoui, A.; Ogbonnaya, F.C.; Bouznad, Z.; Baum, M.Tan spot caused by Pyrenophora tritici-repentis is a major wheat disease. DNA of 61 isolates of P.$$tritici-repentis from different cereal growing areas in Algeria were analyzed using amplified fragment$$length polymorphism (AFLP) in order to study the genetic diversity among this population. Initially, 78$$primer combinations were tested, of which 12 were selected and applied to the 61 isolates. There was a$$high genetic diversity in this population of P. tritici-repentis with 61 different haplotypes among the 61$$isolates selected. The Jaccard similarity index range was 1.43 to 68.37%. Cluster analysis showed that,$$clustering of isolates was independent of their race classification, geographic origin, or host plant.$$However, one isolate (Ptr24) that showed a new virulence pattern in our previous race analysis study$$was clearly distinguished from the rest of the population studied. This isolate had not only new$$virulence but also different genetic makeup to other P. tritici-repentis isolates and requires additional$$studies to decipher complete knowledge of host-pathogen interactions for tan spot of wheat.
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