巴西表亲婚姻的结构。

The structure of first-cousin marriages in Brazil.

机构信息

Departamento de Genética e Biologia Evolutiva, Instituto de Biociências, Universidade de São Paulo, Rua do Matão 277, São Paulo, SP, 05508-090, Brazil.

Núcleo de Estudos em Genética e Educação, Universidade Estadual da Paraíba, Rua das Baraúnas, s/n - Prédio da Integração Acadêmica - sala 329, Campus I - Bodocongó, Campina Grande, Paraíba, Brazil.

出版信息

Sci Rep. 2020 Sep 23;10(1):15573. doi: 10.1038/s41598-020-72366-z.

DOI:10.1038/s41598-020-72366-z

PMID:32968083

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7511957/

Abstract

This paper deals with the frequency and structure of first-cousin marriages, by far the most important and frequent type of consanguineous mating in human populations. Based on the analysis of large amounts of data from the world literature and from large Brazilian samples recently collected, we suggest some explanations for the asymmetry of sexes among the parental sibs of first-cousin marriages. We suggest also a simple manner to correct the method that uses population surnames to assess the different Wright fixation indexes F, F and F taking into account not only alternative methods of surname transmission, but also the asymmetries that are almost always observed in the distribution of sexes among the parental sibs of first-cousins.

摘要

本文探讨了表亲婚姻的频率和结构，表亲婚姻是人类群体中最重要和最常见的血缘交配类型。基于对来自世界文献和最近收集的大型巴西样本的大量数据的分析，我们对表亲婚姻中父母兄弟姐妹的性别不对称提出了一些解释。我们还提出了一种简单的方法来纠正使用姓氏评估不同 Wright 固定指数 F、F 和 F 的方法，该方法不仅考虑了姓氏传递的替代方法，还考虑了在表亲父母兄弟姐妹的性别分布中几乎总是观察到的不对称性。