Zijn kroonbuis dimensies de reden voor lage zaadopbrengst in tetraploïde rode klaver?

Tim Vleugels, Isabel Roldán-Ruiz, Bob Ceuppens, Guy Smagghe, Gerda Cnops

    Onderzoeksoutput: Hoofdstuk in Boek/Rapport/CongresprocedureC1: Artikels in proceedings van wetenschappelijke congressen, die niet inbegrepen zijn in A1, A2, A3 of P1

    Uittreksel

    Seed yield is considerably lower in tetraploid than in diploid red clover.
    The most commonly suggested reason is that tetraploids have longer
    corolla tubes that prevent short-tongued bumblebee species from reaching
    the nectar, thereby resulting in deficient pollination. However, recent
    studies contradict this generally accepted statement. Because there is no
    consensus on this topic, we investigated the relation between seed yield
    and corolla tube length on the same plants in two separate field trials with
    different plant material. One field was sown with the tetraploid cultivar
    ‘Avanti’, while a second field was planted with tetraploid elite families. No
    correlation was found between seed yield and corolla tube length in either
    trial (p = 0.480 and p = 0.430 respectively), which indicates that corolla
    tube length does not affect seed yield in tetraploids. To explore whether
    the corolla tube diameter can explain the lack of correlation observed here,
    we measured this trait in flowers of 25 diploid and 25 tetraploid plants
    grown in pots. The average corolla tube diameter was 19.0 % wider in
    tetraploids than in diploids. Possibly, greater corolla tube diameters compensate
    for longer corolla tubes by allowing bees to insert their heads
    deeper into the tubes. This hypothesis needs to be validated by direct
    observations, currently underway at ILVO.
    TaalEngels
    TitelBreeding in a World of Scarcity : Proceedings of the 2015 Meeting of the Section "Forage Crops and Amenity Grasses" of Eucarpia
    Aantal pagina's5
    UitgeverijSpringer International Publishing Switzerland
    Datum2016
    Pagina's293-300
    Artikel nummer44
    StatusGepubliceerd - 2016
    Evenement31st International EUCARPIA Symposium Section Fodder Crops and Amenity Grasses - Faculteit Bio-ingenieurswetenschappen, Gent, België
    Duur: 13-sep-201517-sep-2015

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