Genetic structure of moroccan lentil landraces from different origins as revealed by short sequence repeat molecular markers using the software structure

Omar Idrissi, Ellen De Keyser, patrick VAN DAMME, Jan De Riek

    Onderzoeksoutput: Hoofdstuk in Boek/Rapport/CongresprocedureC3: Congres abstract

    Uittreksel

    The genetic structure of 252 genotypes of 53 lentil Moroccan landraces from
    different geographic origins was assessed using 19 microsatellites molecular
    markers. According to STRUCTURE software based on Bayesian approach,
    the best genetic structure model displays two gene pools (with the Evanno ad
    hoc statistic ΔK=168.167) of contrasting sizes under the assignment
    probability higher than 80%. A small set of landraces, mainly from the dry
    environment of Abda region, was differentiated from the rest. The largest
    gene pool includes genotypes from different origins. Although, no clear
    correlation was found between geographic origin and genetic structure as the
    two gene pools are represented in all origins. Fifty-three percent of the
    genotypes from a small location in Abda region, the driest environment
    where drought and heat stresses are the most important traits targeted by
    farmers over years for selection of adapted landraces, were assigned to a
    small discrete gene pool. A fairly high value of ΔK (37.46) compared to other
    values suggests the possibility of three gene pools displaying the two local
    cultivars L56 and L24 as major components of the third gene pool with
    97.6% as proportion of membership. As for the model with two gene pools,
    nearly half of the genotypes from the dry Abda region was assigned to a
    small discrete gene pool. These landraces have a short cycle and high early
    vegetative growth vigor conferring drought tolerance.
    TaalEngels
    Titel20th National Symposium on Applied Biological Sciences : Book of Posters Abstracts
    Aantal pagina's1
    Datum30-jan-2015
    Pagina's64
    StatusGepubliceerd - 30-jan-2015
    Evenement20th National Symposium on Apllied Biological Sciences - Leuven, België
    Duur: 30-jan-201530-jan-2015

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