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蓝海人类学在线 Ryan WEI's Forum of Anthropology

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尼科巴、缅甸、安达曼古mtdna

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发表于 2013-9-7 09:40 | 显示全部楼层 |阅读模式
Morphometric and ancient DNA study of human skeletal remanants in Indian Subcontinent.
N. Rai et al.
Recovery and sequencing of mtDNA from ancient human remnants is a daunting task but provides valuable information about human migrations and evolution. Our present study is the first to recover, amplify and sequence (HVR and coding regions of mtDNA) inadequately preserved and highly degraded (1.5 Ky to ≤1.0 Ky ago) hominids mitochondrial DNA of three most intriguing and indigenous ancient population of South and South-East Asia (Myanmar=20 Buried individuals, Nicobar Islands=15 and Andaman Island=6). Following all parameters and to avoid the chance of contamination we independently extracted and sequenced the DNA in two different labs and measured the cranial variability in all hominid skulls using 128 cranial landmarks, compiled 3D morphometrics, genetic data of ancient DNA samples and analyzed the admixture and genetic affinities of above three populations. Results showed the predominant frequency of F1a1 and complete absence of 9bp deletion in ancient Nicobarese. Unlike in previous reports on modern Nicobarese, the high frequency of F1a1 haplogroup in ancient Nicobarese show the probable migration of Nicobarese from South East Asia and the complete absence of 9bp deletion suggests the different events of settlement. This study failed to detect genetic affinities of Burmese with Nicolbarese even though their phenotype and language appears to be same. We first time report any kind of population study on Burmese populations and with the genetic affinity of Burmese with East Asian, East Indian (Including Gadhwal region of Himalaya) and Bangladeshi populations, we found significant admixture with West Eurasians. Our study strongly supports the West Eurasian and East Asian route of migration and settlement of early Burmese population.The three populations in the present study are quite different in their genetic structure but 3D morphometric study using huge number of landmarks explains a close homology among these populations and this can be explained by the role of climatic signature on these populations.
尼科巴古dna主要是F1a1,和周少陵园有很强的可比性。而不是高比例的B。
发表于 2013-9-7 09:48 | 显示全部楼层
缅甸很神奇,多样化的地理和气候特征,注定其成为东亚古人类一个集散地,期待更多的关注和研究。
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