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R-Selection and Genome Size

GOGARTEN at UCONNVM.bitnet GOGARTEN at UCONNVM.bitnet
Thu Mar 18 14:44:57 EST 1993


Does anyone know whether the concept of r- and
k-selection applies to the genome size in plants.
   (The concept of r- and k-selection was developed by
   R.H.MacArthur and E.O.Wilson: r-selection, organisms that
   multiply rapidly and are selected under conditions where the
   population is far from the carrying capacity, e.g. bacteria,
   pioneer plants; k-selection, organisms that are selected under
   conditions where the population size is close to the carrying
   capacity).
  Under r-selection one could expect organisms to have a
streamlined genome with little '"junk"' DNA.  Is it a
coincidence that Arabidopsis has a small genome and that is
a ruderal plant; or is a small genome also found in other
rapidly propagating pioneer plants?
(Along a similar line of thought: Do orchids have a small genome?)

                              Peter Gogarten
                              (Gogarten at UCONNVM.UCONN.edu)



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