A Discovery of Polymorphism of Nucleolar Organizer Regions (NORs) and Whole-Arm Trans location (WAT) between Chromosome 8 and 9 of Lowland Agile Gibbon (Hylobates agilis unko) in Thailand

作者：Tanomtong Alongkoad^*; Khunsook Sumpars; Supanuam Praween; Kaewsri Sarawut; Srisamoot Nattapong

来源：Cytologia, 2010, 75(1): 15-21.

• Polymorphism
• Nucleolar organizer regions (NORs)
• Whole-arm translocation
• Lowland agile gibbon (Hylobates agilis unko)

This paper succeeded in discovering the polymorphism of nucleolar organizer regions (NORs) and whole-arm translocation (WAT) between chromosomes 8 and 9 of the lowland agile gibbon (Hylobates agilis unko) in Thailand, after standard whole blood lymphocyte culture and G-banding technique were applied to stain the chromosomes. The results showed that the 2n of H. agilis unko was 44. The type of autosomes were 28 metacentric, 12 submetacentric and 2 acrocentric chromosomes, with the X and Y-chromosome being submetacentric and acrocentric chromosome, respectively. In addition, a pair of the long arms of chromosome 12 showed clearly observable NORs. This is the first report on the polymorphism of NORs in H. agilis unko. The results show a heteromorphism in female with a difference size of NORs of chromosome 12, while in males show an equal size of both chromosome 12 with a homomorphism. We also detected a WAT between chromosomes 8 and 9 in H. agilis unko and found that both male and female chromosomes 8 and 9 were 8c' (homomorphism, 8c'8c') and 9' (homomorphism, 9'9'), respectively, resulting from pericentric inversion and followed by reciprocal translocation.

• 出版日期2010-3