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    Experimental studies on pollenmediated gene flow in Sorghum bicolor (L.) Moench using malesterile bait plants

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    Date
    2010
    Author
    Rabbi, Ismail Y
    Parzies, H.K.
    Kiambi, D.
    Haussmann, B.I.G.
    Folkertsma, R.T.
    Geiger, H.H
    Type
    Journal Article
    Target Audience
    Scientists
    Metadata
    Show full item record
    Abstract/Description
    Information on the potential of pollen mediated gene flow (PMGF) in sorghum is required for ensuring varietal purity and to mitigate risk transgenic gene flow. Replicated trials were conducted in Kenya using a local landrace, ‘Ochuti’ as pollen donor surrounded by male-sterile pollen baits. Frequency of PMGF decreased with the increase of distance from pollen sources and was significantly influenced by wind direction and speed. Anther dehiscence correlated with increase in vapour pressure deficit in the morning. A negative exponential regression model with logarithmic transformation of PMGF and square-root transformation of distance from source field best fitted the data. Up to 50% of female florets on a male sterile (MS) plant were pollinated at 1 m from pollen source and declined to 14% at 10 m. The maximum distance of PMGF using the PMGF model, based on a threshold of one seed per MS plant, was 203 m when data above the 95th percentile is considered. However, in the presence of self-produced pollen of male-fertile target plants, the possibility of long-distance cross-pollination may be very low.
    http://dx.doi.org/10.1111/j.1439-0523.2010.01775.x
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/2613
    Digital Object Identifier (DOI)
    http://dx.doi.org/10.1111/j.1439-0523.2010.01775.x
    IITA Subjects
    Genetic Improvement; Plant Genetic Resources; Weeds; Plant Health; Plant Production; Meteorology And Climatology
    Agrovoc Terms
    Sorghum; Pollen Dispersal; Gene Flow; Flowering Characteristics
    Regions
    Africa; East Africa; Central Africa; North America
    Countries
    Kenya; United States
    Journals
    Plant Breeding
    Collections
    • Journal and Journal Articles4457
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