New record on karyological analysis and first study of NOR localization of parthenogenetic brahminy blind snake, Ramphotyphlops braminus (Squamata, Typhlopidae) in Thailand.

Autor: Patawang, Isara, Tanomtong, A., Kaewmad, P., Chuaynkern, Y., Duengkae, P.
Zdroj: Nucleus (0029568X); Apr2016, Vol. 59 Issue 1, p61-66, 6p
Abstrakt: This is chromosomal analysis of the brahminy blind snake, Ramphotyphlops braminus (Daudin, 1803), a newly recorded species in northeastern Thailand. Mitotic chromosomes were prepared directly from intestinal epithelia cells of five brahminy blind snakes. Conventional staining and Ag-NOR banding techniques were applied to stain the chromosomes. The results showed that the triploid chromosome number was 3 n = 42, while the fundamental number (NF) was 78. The types of chromosomes were 24 macrochromosomes (19 m + 5sm) and 18 microchromosomes (9 m + 3sm + 6 t). The region adjacent to the short arm near the telomere of one in macrochromosome pair 8 showed a clearly observable nucleolar organizer region/NOR. There were no irregularly sized chromosomes related to sex. The karyotype formula for R. braminus is as follows: 3 n (42) = L + S + S + 18 microchromosomes. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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