Callegari-Jacques S M, Salzano F M, Weimer T A, Hutz M H, Black F L, Santos S E, Guerreiro J F, Mestriner M A, Pandey J P
Mathematics Institute, Federal University of Rio Grande do Sul, Porto Alegre, Brazil.
Ann Hum Biol. 1994 Sep-Oct;21(5):465-81. doi: 10.1080/03014469400003482.
Information related to 31 protein genetic systems was obtained for 307 individuals affiliated with the Cinta Larga, Karitiana, Surui and Kararaô Indians of northern Brazil. In terms of genetic distances the Cinta Larga showed more similarities with the Karitiana (both are Tupi-speaking tribes), while at a more distant level the Surui clustered with the Kararaô. The latter, a Cayapo subgroup, showed a completely different genetic constitution from the other subgroups of this same tribe. Both the Kararaô and Karitiana are small, remnant populations, and their gene pools have presumably been severely affected by random and founder effects. These results were incorporated with those of 25 other Amazonian Indian tribes, and analysis by two multivariate techniques confirmed a previously observed geographical dichotomy, suggesting either that the Amazon river constitutes a barrier to north-south gene flow or that latitudinally different past migrations entered the region from the west.
我们获取了与31个蛋白质遗传系统相关的信息，这些信息来自巴西北部的辛塔拉尔加、卡里蒂亚纳、苏鲁伊和卡拉拉奥印第安人的307名个体。从遗传距离来看，辛塔拉尔加与卡里蒂亚纳（两者都是说图皮语的部落）更为相似，而在更远的层面上，苏鲁伊与卡拉拉奥聚类在一起。后者是卡亚波族的一个亚群，其遗传构成与同一部落的其他亚群完全不同。卡拉拉奥和卡里蒂亚纳都是小规模的残余种群，它们的基因库可能受到了随机效应和奠基者效应的严重影响。这些结果与其他25个亚马逊印第安部落的结果相结合，通过两种多元技术进行的分析证实了之前观察到的地理二分法，这表明要么亚马逊河构成了南北基因流动的障碍，要么过去不同纬度的移民从西部进入了该地区。
