Mitochondrial Control Region and Population Genetic Patterns of Nycticebus bengalensis and N. pygmaeus
- 218 Downloads
Bengal slow lorises (Nycticebus bengalensis) and pygmy slow lorises (Nycticebus pygmaeus) are nocturnal which creates difficulties to study them in the field. There is a scarcity of data on them and their population genetics are poorly understood. We sequenced and analyzed a partial fragment in the first hypervariable region of the mitochondrial control region or D-loop HVRI of 21 Nycticebus bengalensis and 119 N. pygmaeus from the boundary between China and Vietnam where they are sympatric. Though the sample size for Nycticebus pygmaeus is much larger, the polymorphism level is much lower than that of N. bengalensis, possibly because of (1) external gene flow from other habitats of N. bengalensis, (2) gene ingression from Sunda slow lorises (N. coucang coucang) to N. bengalensis, (3) a skewed birth sex ratio in N. pygmaeus, and (4) a possible low survival rate of infant N. pygmaeus. Based on genetic comparisons to Nycticebus bengalensis, we propose that N. pygmaeus in southern China and northern Vietnam might have migrated from middle or southern Vietnam recently.
KeywordsBengal slow loris pygmy slow loris population genetics mitochondrial control region
The Bureau of Science and Technology of Yunnan Province, and National Natural Science Foundation of China (grants 30460026, 30621092) provided funding for this work.
- Chen, J. H., Pan, D., Groves, C., Wang, Y. X., Narushima, E., Fitch-Snyder, H., et al. (2005). Molecular phylogeny of Nycticebus inferred from mitochondrial genes. International Journal of Primatolology, In press.Google Scholar
- Fitch-Snyder, H. (2000). Reproductive patterns in a breeding colony of pygmy lorises (Nycticebus pygmaeus) Measured by behavioral and physiological correlates of gonadal activity. San Diego: San Diego State University.Google Scholar
- Groves, C. P. (2001). Primate taxonomy. Washington, D.C: Smithsonian Institution Press.Google Scholar
- Li, W. H., and Graur, D. (1991). Fundamentals of molecular evolution. Sunderland, MA: Sinauer Associates.Google Scholar
- Lu, X. M., Wang, Y. X., and Zhang, Y. P. (2001). Divergence and phylogeny of mitochondrial cytochrome b gene from species in genus Nycticebus. Zoology Research, 22, 93–98.Google Scholar
- Nei, M. (1987). Molecular evolutionary genetics. New York: Columbia University Press.Google Scholar
- Oxnard, C. E., Crompton, R. H., and Lieberman, S. S. (1990). The case of the prosimian primates. Seattle: University of Washington Press.Google Scholar
- Parsons, T. J., and Holland, M. M. (1998). Reply to Jazin et al. Nature Genetics, 18, 110.Google Scholar
- Wang, S. (1998). China red data book of endangered animals. Beijing, Hong Kong, New York: Science Press.Google Scholar