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

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The genomic history of the Iberian Peninsula over the past 8000 years

发表于 2019-3-16 17:45 | 显示全部楼层 |阅读模式
哈佛团队最新文章。Ref: Olalde et al., Science 363, 1230–1234 (2019) 15 March 2019

We assembled genome-wide data from 271 ancient Iberians, of whom 176 are from the
largely unsampled period after 2000 BCE, thereby providing a high-resolution time transect
of the Iberian Peninsula.We document high genetic substructure between northwestern
and southeastern hunter-gatherers before the spread of farming.We reveal sporadic
contacts between Iberia and North Africa by ~2500 BCE and, by ~2000 BCE, the
replacement of 40% of Iberia’s ancestry and nearly 100% of its Y-chromosomes by people
with Steppe ancestry.We show that, in the Iron Age, Steppe ancestry had spread not only
into Indo-European–speaking regions but also into non-Indo-European–speaking ones, and
we reveal that present-day Basques are best described as a typical Iron Age population
without the admixture events that later affected the rest of Iberia. Additionally,we document
how, beginning at least in the Roman period, the ancestry of the peninsula was transformed
by gene flow from North Africa and the eastern Mediterranean.
发表于 2019-3-18 12:58 | 显示全部楼层
发表于 2019-3-18 12:59 | 显示全部楼层
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发表于 2019-3-18 15:37 | 显示全部楼层
以M269为代表的印欧人在伊比利亚的命运也算是蛮多舛的,在石器末期开始大规模进入该地区,最终把该地区彻底印欧化,一直持续到该地区开始基督化之时,估计与罗马帝国的崩溃有关。  之后,地中海沿岸的J2a与E1b(拿破仑-希特勒父系)再度占据上风, 估计与罗马崩盘后大批的日耳曼蛮族扰乱整个帝国有关~
 楼主| 发表于 2019-3-18 16:08 | 显示全部楼层
imvivi001 发表于 2019-3-18 15:37
以M269为代表的印欧人在伊比利亚的命运也算是蛮多舛的,在石器末期开始大规模进入该地区,最终把该地区彻底 ...


发表于 2019-3-18 19:15 | 显示全部楼层
geoanth 发表于 2019-3-18 16:08

英国爱尔兰 ...

是的,你说的很有道理。 半岛南北差异明显,估计与北非人长期占据气候更为宜人的南方有关~
发表于 2019-3-18 21:30 | 显示全部楼层
本帖最后由 imvivi001 于 2019-3-18 21:34 编辑

In the middle of the 5th century BCE the settlement was widely reformed and experienced a radical change in the conception of the habitation space (Phase 2). In this period the ancient cutout in the natural rock occupied by the chambers of the previous phase was filled. The filling of the cut allowed for larger houses that rested on a prominent wall that enclosed the village. The first human skull remains were found under this wall connected
with horse remains in what seems like a ritual offering.

发表于 2019-3-18 23:26 | 显示全部楼层
发表于 2019-3-28 00:16 | 显示全部楼层

Copper Age outlier from Camino de las Yeseras
One Copper Age individual (C_Iberia_CA_Afr; ID I4246) excavated at Camino de las Yeseras in central Iberia clusters with North Africans and not with Europeans in PCA (Fig. 1C, Fig. S3-4), and we wanted to check whether qpAdm detects the same genetic signal. Previous studies have reported the presence of ancestry related to Early Neolithic Europeans in Late Neolithic North Africans (8). Therefore, we included in our outgroup set several Early Neolithic Europeans (Croatia_EN, Iberia_EN, Macedonia_N, Serbia_EN, LBK_EN, Romania_EN, Hungary_EN) under the population name Europe_EN to act as a possible ancestry source.
Outgroup set: Mota, Ust_Ishim, Kostenki14, GoyetQ116-1, Vestonice16, MA1, El Mirón, Villabruna, WHG, EHG, Iran_N, Israel_Natufian, Levant_N, Europe_EN, Morocco_Iberomaurusian, Tianyuan
The best 2-way and 3-way models both feature Europe_EN and Morocco_Iberomaurusian, with ancestry proportion for Mota not significantly different
from 0 in the 3-way model (Table S9). This supports the conclusion that C_Iberia_CA_Afr, like Late Neolithic North Africans (8), has ancestry related to both Early Neolithic Europeans and earlier North Africans, supporting a North African origin for this individual.
Next, we added Early and Late Neolithic North Africans (8) to the outgroup set and found that all the successful models included Morocco_LN as the main source of ancestry (Table S10). This confirms that C_Iberia_CA_Afr was genetically close to populations living in Morocco during the Late Neolithic, but with less ancestry related to Early Neolithic Europeans as compared to the available Morocco_LN individuals.

     A North African origin is further supported by uniparental markers: Y-chromosome E1b1b1a and mtDNA haplogroup M1a1b1 (tables S1 and S4). Both E1b1b1a, and the higher ranking clade M1a occur most frequently in present-day North and East Africans (187, 188). Also, haplogroups M1 (albeit M1b) and E1b1b1 have been found in Late Pleistocene and Early Neolithic North Africans (8, 15) but are completely absent or very rare in Neolithic and Copper Age Iberians.


发表于 2019-9-9 12:39 | 显示全部楼层

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发表于 2019-10-10 16:08 | 显示全部楼层
本帖最后由 imvivi001 于 2019-10-10 16:10 编辑

    上面图表数据很有意思,新石器时期的意大利农夫(好像应该是奥地利农夫著名的“冰人奥茨”)居然带有2.8%的东亚成分,怎么来的呢?  值得思索,呵呵
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