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Genetic diversity within and between ramnant populations of the endangered calcareous plant Globularia bisnagarica L.

The Paper of Honney et al. was presented from WeberV at the “Current Topics in Grassland Science”, (29.10.07)

Honney et al. (2007) found out, that the Globularia bisnagarica populations in Belgium (27) are characterized by high genetic differentiation (Gf=0,53, p<0,001). A Manteltest revealed a significant isolation by distance. Gene diversity within the populations was low (Hj=0,081) and was negatively related to population isolation. This suggests more gen flow into less isolated populations. Population size and local habitat characteristics did not significantly influence population genetic diversity. Additionally a clear geographical clustering of the Western- and Eastern-populations was observed. So the genetic differentiation was not high enough to erase the genetic similarity between fragments that historically belonged to the same large grassland fragment. Only counter example was the population AB3. Additional researches should focus on the question if the fragmentation and the decreased gene diversity has an impact on viability. If yes the connectivity of the grasslands should be in focus in the future.

October 30th, 2007
Topic: Crop Science, Plant biodiversity Tags: None

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