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
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?)
(Gogarten at UCONNVM.UCONN.edu)