Yazar "Trifi-Farah, N." seçeneğine göre listele

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    Genetic Diversity Analysis of Mediterranean Apricot Geographic Groups
    (Int Soc Horticultural Science, 2012) Bourguiba, H.; Khadari, B.; Krichen, L.; Trifi-Farah, N.; Mamouni, A.; Trabelsi, S.; D'Onofrio, C.
    Analysis of apricot (Prunus armeniaca L.) genetic diversity in the Mediterranean Basin was conducted in order to understand the evolutionary history of the species in this region. In total, 207 native apricot accessions originating from different Mediterranean countries: Algeria, France, Italy, Morocco, Spain, Tunisia and Turkey, and representatives of the local variability were selected. This material was analyzed using a common set of 25 monolocus microsatellites distributed throughout the Prunus genome. The studied germplasm showed considerable polymorphism with total alleles numbering 257. According to the geographic origin and the passport data of the material, eleven groups were defined. Genetic variability analysis was assessed within each group revealing a gradient of decreasing diversity from the east to the south-west of the Mediterranean Basin, suggesting a loss of genetic diversity during apricot diffusion. The obtained results will be useful to optimize genetic resources management and conservation at the Mediterranean level.
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    Genetic Structure of Mediterranean Apricots by SSR Fingerprinting
    (Int Soc Horticultural Science, 2011) Bourguiba, H.; Krichen, L.; Trifi-Farah, N.; Khadari, B.; Mamouni, A.; Trabelsi, S.; D'Onofrio, C.
    Apricot (Prunus armeniaca L.) is an important fruit species especially in the Mediterranean basin area. The genetic structure of apricot cultivars in this region was studied in order to shed light on the evolutionary history of this species. A sample of 207 patrimonial accessions was collected from different Mediterranean countries: Algeria, France, Italy, Morocco, Tunisia, Turkey, and Spain. Molecular characterization was performed using 25 SSR markers, selected according to high level of polymorphism, transferability between Prunus species, and localisation over the eight linkage groups of the Prunus genome. Statistical treatment of the dataset was undertaken using a model-based Bayesian clustering analysis implemented in the STRUCTURE program. It allowed assignment of the studied accessions into four distinct genetic clusters (Fst=0.122). A gradient of decreasing genetic diversity from the east to the south-west of the Mediterranean area was also evidenced. An interesting new pattern based on the discrimination of a 'Maghreb' cluster was revealed for the first time. These results clearly open new research lines dealing with the establishment of a nested core collection at the Mediterranean level, and with the prospective development of genetic association studies.