Thitima Sanpachudayan. Mitochondrial DNA analysis of prehistoric human remains from Noen U-Loke, Nakhon Ratchasima. Master's Degree(Biochemistry). Mahidol University. : Mahidol University, 2009-07-09.
Mitochondrial DNA analysis of prehistoric human remains from Noen U-Loke, Nakhon Ratchasima
Abstract:
The Iron Age sites of the Mun River Valley are among the most important and
significant sites in Southeast Asia for documenting the rise of the state. Three sites
around the upper Mun River Valley have been excavated which are Noen U-Loke,
Ban Lum Khao and Prasat Phimai. The prehistoric cemetery at Noen U-Loke was
dated in the vicinity of Iron Age about 2,400-1,500 years before present. The cultural
sequence at Noen U-Loke is one of the longest continuous records. Knowledge of the
prehistory was greatly increased by much residential and industrial evidence. The
present study aims to generate additional information about the relationship between
the prehistoric human populations in this area. An important tool for this investigation
was DNA analysis. Previous studies have shown that DNA can survive in ancient
remains. The twenty-six molar teeth of good quality were collected from twenty-six
adult skeletons, one each, from Noen U-Loke archaeological site. The method
originally used for ancient DNA extraction was very similar to a silica/guanidine
thiocyanate method that described in Boom et al, 1990 and modified by Höss and
Pääbo. The additional used of phosphate buffer was designed for DNA extraction
from hydroxyapatite crystal according to Persson, 1992 and Götherström and Lidén,
1996. These modified protocols gave us a good yield of DNA and high succeed rate
of DNA recovery (22 out of 26 = 80%). The ancient DNA authenticity was seriously
checked, all mitochondrial DNA sequences from each of samples in this study was
then trusted to be derived from the excavated remains. The modern samples from
several ethnic groups in Thailand and from several part of China were included to the
analyses. The investigations indicated that the Noen U-Loke area probably used by a
relative population without or very few migrations from outside population through
900 years (2,400-1,500 BP) and suggested that the ancestor of the ancient population
from Noen U-Loke probably moved from eastern China more than 2,400 before