The copy number of Revolver gene in wild emmer wheat T. dicoccoides in 18 populations (161 genotypes) representing a wide range of ecologic conditions of soil, temperature, and water availability in Israel. The populations in the catchment area showed high copy numbers almost over 7,000 per haploid genome and included several genotypes with around 20,000 copies. In contrast, the populations of marginal steppic areas included several genotypes with low copy numbers less than 1,000. In the marginal mesic areas, copy numbers were very stable (from 6,000 to 8,000). This considerable quantitative diversity in the single species and among or in the populations suggests recent mobilization of Revolver by ecologic stresses.
Tomita et al. BMC Evolutionary Biology 2011 11:269 doi:10.1186/1471-2148-11-269