10万年前穴居人与智人曾有过混血
文章来源:未知 文章作者:enread 发布时间:2016-02-18 05:23 字体: [ ]  进入论坛
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A multidisciplinary team which included participants from the Spanish National Research Council (CSIC) has discovered that Homo neanderthalensis and Homo sapiens crossbred over 100,000 years ago. This puts back the previously1 first-known case of a hybrid2 produced by the two species by 50,000 years. This earlier genetic4 exchange, which may have taken place in the Near East, has not been detected in European Neanderthals. The results of the work appear in the latest edition of 'Nature' magazine. A multidisciplinary team which included participants from the Spanish National Research Council (CSIC) has discovered that Homo neanderthalensis and Homo sapiens crossbred over 100,000 years ago. This puts back the previously first-known case of a hybrid produced by the two species by 50,000 years. This earlier genetic exchange, which may have taken place in the Near East, has not been detected in European Neanderthals. The results of the work appear in the latest edition of Nature magazine.
 
Analysed the genomes of a Neanderthal and a Siberian Denisovan, as well as the sequences of chromosome5 21 of a Neanderthal found in the 'Sidrón' cave in Asturias, Northern Spain, and of another from Vindija, Croatia.
 
The CSIC researchers who took part in the study were Carles Lalueza-Fox (Institute of Evolutionary6 Biology) and Antonio Rosas (Spanish Natural Science Museum). Others who took part were the archaeologist, Marco de la Rasilla, along with other specialists in genomics, Tomás Marques-Bonet and Sergi Castellano, the latter being jointly7 responsible for the study.
 
Rosas explains that the work poses a brand new scenario8. "Over 100,000 years ago, anatomically modern humans ventured out of Africa for the first time. These modern humans met and interbred with a group of Neanderthals, which later may have moved to the south of modern day Siberia, carrying the genes9 of H. sapiens."
 
What researchers have known since 2010, thanks to the study of the Neanderthal genome, is that around 50,000 years ago, following their migration10 from Africa, a group of modern humans- the predecessors11 of today's Europeans and Asians- interbred with Neanderthals. As a consequence of this gene3 flow, these non-African modern humans carry 2% genetic sequences from Neanderthals. In contrast, the Sub-Saharan modern human population, who never had any contact with Neanderthals, therefore do not carry this ancient gene (apart from very recent introgression).


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1 previously bkzzzC     
adv.以前,先前(地)
参考例句:
  • The bicycle tyre blew out at a previously damaged point.自行车胎在以前损坏过的地方又爆开了。
  • Let me digress for a moment and explain what had happened previously.让我岔开一会儿,解释原先发生了什么。
2 hybrid pcBzu     
n.(动,植)杂种,混合物
参考例句:
  • That is a hybrid perpetual rose.那是一株杂交的四季开花的蔷薇。
  • The hybrid was tall,handsome,and intelligent.那混血儿高大、英俊、又聪明。
3 gene WgKxx     
n.遗传因子,基因
参考例句:
  • A single gene may have many effects.单一基因可能具有很多种效应。
  • The targeting of gene therapy has been paid close attention.其中基因治疗的靶向性是值得密切关注的问题之一。
4 genetic PgIxp     
adj.遗传的,遗传学的
参考例句:
  • It's very difficult to treat genetic diseases.遗传性疾病治疗起来很困难。
  • Each daughter cell can receive a full complement of the genetic information.每个子细胞可以收到遗传信息的一个完全补偿物。
5 chromosome 7rUzX     
n.染色体
参考例句:
  • Chromosome material with exhibits of such behaviour is called heterochromatin.表现这种现象的染色体物质叫做异染色质。
  • A segment of the chromosome may become lost,resulting in a deletion.染色体的一个片段可能会丢失,结果产生染色体的缺失。
6 evolutionary Ctqz7m     
adj.进化的;演化的,演变的;[生]进化论的
参考例句:
  • Life has its own evolutionary process.生命有其自身的进化过程。
  • These are fascinating questions to be resolved by the evolutionary studies of plants.这些十分吸引人的问题将在研究植物进化过程中得以解决。
7 jointly jp9zvS     
ad.联合地,共同地
参考例句:
  • Tenants are jointly and severally liable for payment of the rent. 租金由承租人共同且分别承担。
  • She owns the house jointly with her husband. 她和丈夫共同拥有这所房子。
8 scenario lZoxm     
n.剧本,脚本;概要
参考例句:
  • But the birth scenario is not completely accurate.然而分娩脚本并非完全准确的。
  • This is a totally different scenario.这是完全不同的剧本。
9 genes 01914f8eac35d7e14afa065217edd8c0     
n.基因( gene的名词复数 )
参考例句:
  • You have good genes from your parents, so you should live a long time. 你从父母那儿获得优良的基因,所以能够活得很长。 来自《简明英汉词典》
  • Differences will help to reveal the functions of the genes. 它们间的差异将会帮助我们揭开基因多种功能。 来自英汉非文学 - 生命科学 - 生物技术的世纪
10 migration mDpxj     
n.迁移,移居,(鸟类等的)迁徙
参考例句:
  • Swallows begin their migration south in autumn.燕子在秋季开始向南方迁移。
  • He described the vernal migration of birds in detail.他详细地描述了鸟的春季移居。
11 predecessors b59b392832b9ce6825062c39c88d5147     
n.前任( predecessor的名词复数 );前辈;(被取代的)原有事物;前身
参考例句:
  • The new government set about dismantling their predecessors' legislation. 新政府正着手废除其前任所制定的法律。 来自《简明英汉词典》
  • Will new plan be any more acceptable than its predecessors? 新计划比原先的计划更能令人满意吗? 来自《简明英汉词典》
TAG标签: species genetic humans
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