Model variation

To better understand how evolutionary pressures have helped shape genetic variation in Arabidopsis thaliana, Detlef Weigel from the Salk Institute for Biological Studies in La Jolla, Calif., and colleagues used high-density oligonucleotide arrays to look at single nucleotide polymorphisms of 20 diverse strains of the plant.1 The group found that, since 2000, about 4% of the genome changed significantly or was deleted.


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