Y-chromosomal gene flow of Macaca fascicularis (Cercopithecidae) between the insular and mainland peninsula of Penang state, Malaysia
DNA sequencing of the Y-chromosome testis-specific protein locus (TSPY) and sex-determining region (SRY) was conducted on 27 Macaca fascicularis individuals from eight insular and two peninsula localities of Penang State, Malaysia. Five haplotypes were discovered from the Penang samples, of which...
Saved in:
Main Authors: | , , , , |
---|---|
Format: | E-Article |
Language: | English |
Published: |
Journal of Science and Technology in the Tropics
2013
|
Subjects: | |
Online Access: | http://ir.unimas.my/id/eprint/1474/1/y-chromosomal%20gene%20flow%20of%20macaca%20fascicularis%20%28abstract%29.pdf http://ir.unimas.my/id/eprint/1474/ http://www.academia.edu/5541076/Y-chromosomal_gene_flow_of_Macaca_fascicularis_ |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Summary: | DNA sequencing of the Y-chromosome testis-specific protein locus (TSPY)
and sex-determining region (SRY) was conducted on 27 Macaca fascicularis individuals
from eight insular and two peninsula localities of Penang State, Malaysia. Five
haplotypes were discovered from the Penang samples, of which four were unique for
that population. These haplotypes constituted of related individuals as observed in the
Y-chromosomal gene flow within and between the insular and mainland regions. The
occurrence of a dominant haplotype shared amongst M. fascicularis from southern
Thailand, the Malay Peninsula, and Sumatra could be the result of a recent dispersal
event from the common Pleistocene refugia, which had most likely been located in
the Malay Peninsula. A combination of nucleotides at 12 sites distinguished the M.
fascicularis from the northern region of the Isthmus of Kra from those of the southern
region including our samples. The molecular phylogenetic tree confirmed that, unlike
conspecific populations from regions north of the Isthmus of Kra, M. fascicularis from
the southern region of the isthmus were free of introgression of Y-chromosome from
M. mulatta. We dated the last common ancestors shared by the fascicularis group at
approximately 1.5 million years ago (mya). Also, we estimated the bifurcation between
the insular and the continental lineages of M. fascicularis as approximately 0.7 mya,
which had been estimated as 0.4 mya in a previous study. Finally, similarly to the
observations on various taxa by previous authors we recognise the role of the Isthmus
of Kra area as a genetic barrier to the dispersal of and to gene flow in M. fascicularis. |
---|