近日巴西米納斯吉拉斯聯(lián)邦大學(xué)一份調(diào)查顯示,，熱情的巴西人有近六成的民眾都含有歐洲人基因,，是世界上最接近歐洲族群的種族,。
因?yàn)轺詈谄つw和熱情奔放的生活態(tài)度,，巴西人一向被認(rèn)為應(yīng)該與非洲人的基因較相近,，不過根據(jù)研究報導(dǎo)指出,，雖然巴西人的膚色較黑，卻擁有與歐洲人較相似的基因,。
巴西多數(shù)人皆擁有歐洲人基因,，其中東北部有60.6%的比例，南部更是高達(dá)77.7%,。而會有這樣的狀況,，主要是因?yàn)榘臀饔?9世界末「歐洲化」，隨著黑奴的解放,，有超過600萬名的歐洲勞工移民巴西,，并在此生根并與當(dāng)?shù)氐脑∶瘛⒎侵奕私Y(jié)婚生子,，才會讓巴西人擁有與歐洲人相似的基因,。
據(jù)遺傳學(xué)專家潘納（Sergio Pena）表示，這項研究結(jié)果可能對于人類學(xué)和巴西歷史產(chǎn)生重大的沖擊,，不過站在醫(yī)學(xué)的角度來看,，這樣的相似基因，也可以做為巴西人治療同樣性的基礎(chǔ),。（生物谷Bioon.com）
生物谷推薦原文出處：
PLoS ONE 6(2): e17063. doi:10.1371/journal.pone.0017063
The Genomic Ancestry of Individuals from Different Geographical Regions of Brazil Is More Uniform Than Expected
Sérgio D. J. Pena1*, Giuliano Di Pietro2, Mateus Fuchshuber-Moraes3, Julia Pasqualini Genro4, Mara H. Hutz4, Fernanda de Souza Gomes Kehdy1, Fabiana Kohlrausch3, Luiz Alexandre Viana Magno5, Raquel Carvalho Montenegro6, Manoel Odorico Moraes6, Maria Elisabete Amaral de Moraes6, Milene Raiol de Moraes7, élida B. Ojopi8, Jamila A. Perini3, Clarice Racciopi1, ?ndrea Kely Campos Ribeiro-dos-Santos7, Fabrício Rios-Santos2, Marco A. Romano-Silva5, Vinicius A. Sortica4, Guilherme Suarez-Kurtz3
Abstract
Based on pre-DNA racial/color methodology, clinical and pharmacological trials have traditionally considered the different geographical regions of Brazil as being very heterogeneous. We wished to ascertain how such diversity of regional color categories correlated with ancestry. Using a panel of 40 validated ancestry-informative insertion-deletion DNA polymorphisms we estimated individually the European, African and Amerindian ancestry components of 934 self-categorized White, Brown or Black Brazilians from the four most populous regions of the Country. We unraveled great ancestral diversity between and within the different regions. Especially, color categories in the northern part of Brazil diverged significantly in their ancestry proportions from their counterparts in the southern part of the Country, indicating that diverse regional semantics were being used in the self-classification as White, Brown or Black. To circumvent these regional subjective differences in color perception, we estimated the general ancestry proportions of each of the four regions in a form independent of color considerations. For that, we multiplied the proportions of a given ancestry in a given color category by the official census information about the proportion of that color category in the specific region, to arrive at a “total ancestry” estimate. Once such a calculation was performed, there emerged a much higher level of uniformity than previously expected. In all regions studied, the European ancestry was predominant, with proportions ranging from 60.6% in the Northeast to 77.7% in the South. We propose that the immigration of six million Europeans to Brazil in the 19th and 20th centuries - a phenomenon described and intended as the “whitening of Brazil” - is in large part responsible for dissipating previous ancestry dissimilarities that reflected region-specific population histories. These findings, of both clinical and sociological importance for Brazil, should also be relevant to other countries with ancestrally admixed populations.
