Abstract
The genus Artemia (Crustacea, Phyllopoda) is widely distributed all over the world as a result partly of natural colonization and partly of spread by birds and man. Artemia offers a very interesting model for speciation studies, since the genus comprises both bisexual sibling species and parthenogenetic populations, exhibiting different chromosome numbers (diploidy, heteroploidy and polyploidy). The finding of the clustered repetitive AluI DNA family in the heterochromatin of A. franciscana can provide a useful tool for investigating the relationship between the members of the genus Artemia at the molecular level. Sixteen strains of Artemia, comprising sibling species and parthenogenetic populations, were analysed for the presence of AluI repetitive DNA by dot-blot hybridization. The observed variation in the content of repetitive DNA together with genetical, biological and geological data, support the hypothesis that Artemia living in the New World are derived from ancestral species that evolved in the Mediterranean area.
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Badaracco, G., Baratelli, L., Ginelli, E. et al. Variations in repetitive DNA and heterochromatin in the genus Artemia . Chromosoma 95, 71–75 (1987). https://doi.org/10.1007/BF00293844
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DOI: https://doi.org/10.1007/BF00293844