An archaeological excavation in Valle da Gafaria (Lagos, Portugal), revealed two contiguous burial places outside the medieval city walls, dating from the 15th–17th centuries AD: one was interpreted as a Leprosarium cemetery and the second as an urban discard deposit, where signs of violent, unceremonious burials suggested that these remains may belong to slaves captured in Africa by the Portuguese. We obtained random short autosomal sequence reads from seven individuals: two from the latter site and five from the Leprosarium and used these to call SNP identities and estimate ancestral affinities with modern reference data. The Leprosarium site samples were less preserved but gave some probability of both African and European ancestry. The two discard deposit burials each gave African affinity signals, which were further refined toward modern West African or Bantu genotyped samples. These data from distressed burials illustrate an African contribution to a low status stratum of Lagos society at a time when this port became a hub of the European trade in African slaves which formed a precursor to the transatlantic transfer of millions.
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机译：瓦莱达加法里亚（Valle da Gafaria）（葡萄牙拉各斯）的考古发掘显示，中世纪城墙外有两个连续的墓地，其历史可追溯到公元15世纪。被认为是麻风墓地，其次被认为是城市丢弃物存放地，那里有暴力，礼节性葬礼的迹象表明，这些遗骸可能属于葡萄牙人在非洲捕获的奴隶。我们获得了来自七个个体的随机短常染色体序列读数：两个来自后者，五个来自麻风病，并使用这些来称呼SNP身份并利用现代参考数据估算祖先亲和力。麻风病遗址的样品保存较少，但具有非洲和欧洲血统的可能性。这两个废弃的沉积物埋葬都发出了非洲亲和力信号，并进一步向现代西非或班图族基因型样品精制。来自苦难埋葬的这些数据表明，当非洲港口成为欧洲非洲奴隶贸易的枢纽时，非洲为拉各斯社会地位低下的阶层做出了贡献。非洲奴隶是跨大西洋转移数百万人的先驱。
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