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Updated: Aug 18, 2026

Induction and Evaluation of Inbreeding Crosses Using the Ant, Vollenhovia Emeryi
Published on: October 5, 2018
Genomic dispersion of 28S rDNA during karyotypic evolution in the ant genus Myrmecia (Formicidae)
H Hirai1, M T Yamamoto, R W Taylor
1Primate Research Institute, Kyoto University, Inuyama, Aichi-ken 484, Japan.
Abstract:
The chromosomal localization of 28S rDNA was investigated in 16 speices of the Australian ant genus Myrmecia, with 2n numbers ranging from 4 to 76, using the fluorescence in situ hybridization method and karyographic analysis. A unique phenomenon was observed: the number of chromosomes carrying 28S rDNA increases from 2 in species with low chromosome numbers to 19 in species with high chromosome numbers. This is termed rDNA dispersion. Centric fission and a reciprocal translocation that occurs in C-bands were detected as the major mechanisms involved in rDNA dispersion.
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