Modelling the spread of pollen from Lolium perenne. The implications for the release of wind-pollinated transgenics

Autor: Glynis Giddings
Rok vydání: 2000
Předmět:
Zdroj: Theoretical and Applied Genetics. 100:971-974
ISSN: 1432-2242
0040-5752
DOI: 10.1007/s001220051378
Popis: The dispersal of pollen from a Lolium perenne source has previously been described using various Gaussian plume models which take distance and wind direction into account. One of these models is used here to calculate, using integration, possible pollen deposition onto small conspecific populations a kilometer from the source. The percentage of immigrant pollen is compared for six different sets of parameter values previously estimated from pollen-dispersal experiments. The source size is then scaled up to simulate what might happen if transgenic ryegrass was grown on a large scale. In this case it is seen that small conspecific populations might, in some conditions, be swamped by immigrant pollen, even if they are not directly downwind of the source. The implications of this are discussed in terms of assessing and managing the risks of releasing wind-pollinated transgenic crops.
Databáze: OpenAIRE