Stages in the differentiation of sex and NOR-bearing chromosomes among species and populations of Characidium. In (a) steps and idiogram representation of the NOR and W sequences rearrangements; (b) hypothesised relationship among species analysed. 1C. lauroi of the Ribeirão Grande population; 2C. lauroi of the Ubatuba population; 3C. gomesi of the Alambari population; 4C. gomesi of the Minhoca population and; 5C. gomesi of the Verde population.
Machado et al. BMC Genetics 2011 12:65 doi:10.1186/1471-2156-12-65