Semenyna Scott W, Petterson Lanna J, VanderLaan Doug P, Vasey Paul L
Department of Psychology, University of Lethbridge, C866 University Hall, 4401 University Drive, Lethbridge, AB, T1K 3M4, Canada.
Department of Psychology, University of Toronto Mississauga, Mississauga, ON, Canada.
Arch Sex Behav. 2017 Jan;46(1):87-93. doi: 10.1007/s10508-016-0765-8. Epub 2016 Oct 26.
The sexually antagonistic gene hypothesis (SAGH) for male androphilia posits that genes associated with androphilia (i.e., sexual attraction to adult males) will result in lowered reproduction when present in males, but increased reproduction when present in females. Findings derived from some Western European samples furnish support for the SAGH; however, results from studies conducted in other regions of the world have been more equivocal. Our previous research in Samoa indicated that the mothers as well as the maternal and paternal grandmothers of androphilic males (known locally as fa'afafine) exhibit elevated reproductive output when compared to the relatives of gynephilic men (i.e., males that are sexually attracted to adult females). The present replication study tested the SAGH in Samoa using a sample that was 122 % larger than the one previously studied by our group (VanderLaan, Forrester, Petterson, & Vasey, 2012). In line with the predictions of the SAGH, we hypothesized that the grandmothers, aunts, and mothers of fa'afafine would show elevated reproductive output compared to those of Samoan gynephilic men. Data were collected from 191 fa'afafine and 191 gynephilic men on the reproductive output of their paternal and maternal biological relatives (i.e., mothers, grandmothers, aunts, uncles). The mothers and maternal grandmothers of fa'afafine showed elevated reproductive output compared to those of gynephilic men. The paternal grandmother effect was not replicated. Although these results are consistent with the SAGH, a lack of difference in the reproductive output of aunts renders support for the SAGH in Samoa equivocal.
针对男性恋男性倾向的性拮抗基因假说(SAGH)假定,与恋男性倾向(即对成年男性的性吸引力)相关的基因,在男性身上会导致繁殖率降低,但在女性身上则会导致繁殖率升高。来自一些西欧样本的研究结果为性拮抗基因假说提供了支持;然而,在世界其他地区进行的研究结果则更为模糊。我们之前在萨摩亚的研究表明,与异性恋男性(即被成年女性性吸引的男性)的亲属相比,恋男性倾向男性(当地称为“fa'afafine”)的母亲以及外祖母和祖母的生殖产出更高。本重复研究在萨摩亚对性拮抗基因假说进行了测试,使用的样本比我们团队之前研究的样本(VanderLaan、Forrester、Petterson和Vasey,2012年)大122%。与性拮抗基因假说的预测一致,我们假设“fa'afafine”的祖母、阿姨和母亲与萨摩亚异性恋男性的祖母、阿姨和母亲相比,会表现出更高的生殖产出。我们收集了191名“fa'afafine”和191名异性恋男性关于其父母双方生物学亲属(即母亲、祖母、阿姨、叔叔)生殖产出的数据。与异性恋男性的母亲和外祖母相比,“fa'afafine”的母亲和外祖母表现出更高的生殖产出。父系祖母效应没有得到重复验证。尽管这些结果与性拮抗基因假说一致,但阿姨生殖产出缺乏差异使得对萨摩亚性拮抗基因假说的支持变得模糊。