tailieunhanh - Báo cáo sinh học: " Timing the first human migration into eastern Asia"

Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí sinh học Journal of Biology đề tài: Timing the first human migration into eastern Asia. | Journal of Biology BioMed Central Minireview Timing the first human migration into eastern Asia Roscoe Stanyon Marco Sazzinit and Donata Luisellit Addresses University of Florence Department of Evolutionary Biology Laboratories of Anthropology Via del Proconsolo 12 50122 Florence Italy. tUniversity of Bologna Department of Experimental Evolutionary Biology Via Selmi 3 40126 Bologna Italy. Correspondence Roscoe Stanyon. Email Published 6 February 2009 Journal of Biology 2009 8 18 doi jbiol115 The electronic version of this article is the complete one and can be found online at http content 8 2 18 2009 BioMed Central Ltd Abstract A recent report in BMC Biology indicates that modern humans first arrived in southern East Asia 60 000 years ago and settled the rest of East Asia from there. This early date and migration route has significant implications for our understanding of the origins of present-day human populations. Studies of human origins have witnessed a radical transition from studies based on morphological comparisons to a reliance on molecular genetics. One of the first molecular comparisons estimated human divergence from the African apes at a now generally accepted timescale of 5 million years ago when most paleontologists then placed it between 15 and 30 million years ago. Later measurement of genetic diversity revealed the relatively recent origin in Africa of modern humans who then spread over the entire globe see 1 and citations therein . Much current research in anthropology centers on understanding the timing and migration routes of modern humans. An analysis of Y-chromosome genetic diversity published by Shi et al. 2 in BMC Biology has now clarified migration routes and times of settlement for East Asia with wide-ranging implications. Previously it seemed equally possible that the modern humans who settled East Asia came either from Southeast Asia or alternatively migrated southward from northern Asia. .