Abstract
C-banding analysis with 47 gibbons of the subgenus Hylobates (Hylobates) (44-chromosome gibbons) uncovered that the gibbons had a characteristic complicated C-banding pattern. The C-band pattern also revealed that a whole-arm translocation (WAT) between chromosomes 8 and 9 existed only in the species H. agilis (agile gibbon). Comprehensive consideration allows postulation that the translocation seemed to be restricted to two subspecies: H. agilis agilis (mountain agile gibbon) and H. agilis unko (lowland agile gibbon), found in Sumatra and part of the Malay Peninsula. Moreover, combined intensive analyses of C-banding and chromosome painting provided strong evidence for a plausible evolutionary pathway of chromosome differentiation of chromosomes 8 and 9. The C-banded morph 8Mt/c seemed to be the primary type of chromosome 8 in the subgenus and to have altered into the three morphs through three pericentric inversions. The newest morph (8AM/ci) produced by the third inversion exchanged the long arm for chromosome 9, and subsequently constructed the WAT morphs of 8/9AMc/ct and 9/8Mi/ci.
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Hirai, H., Mootnick, A.R., Takenaka, O. et al. Genetic mechanism and property of a whole-arm translocation (WAT) between chromosomes 8 and 9 of agile gibbons (Hylobates agilis). Chromosome Res 11, 37–50 (2003). https://doi.org/10.1023/A:1022006015379
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DOI: https://doi.org/10.1023/A:1022006015379