Franco M H, Weimer T A, Salzano F M
Am J Phys Anthropol. 1982 Jun;58(2):127-32. doi: 10.1002/ajpa.1330580204.
One thousand individuals from the southern population of Porto Alegre and 760 from the northeastern city of Natal were studied in relation to 12 and 8 genetic systems, respectively. The data thus gathered were used in different ways to estimate quantitatively the ethnic composition of individuals from these communities. More than half of the genes present in individuals classified as Black in Porto Alegre may be of White origin, while the Whites from this city have 8% of African alleles. The estimated degree of admixture in persons identified as White or Mixed in Natal is not much different among themselves. The ancestry of the total sample can be characterized as 58% White, 25% Black, and 17% Indian.
分别对来自阿雷格里港南部人群的1000人和来自东北部城市纳塔尔的760人进行了研究，涉及12个和8个遗传系统。由此收集的数据以不同方式用于定量估计这些社区个体的种族构成。在阿雷格里港被归类为黑人的个体中，超过一半的基因可能源自白人，而该城市的白人有8%的非洲等位基因。在纳塔尔被认定为白人或混血的人群中，估计的混合程度彼此之间差异不大。整个样本的祖先构成可描述为58%为白人，25%为黑人，17%为印第安人。
