https://www.nature.com/articles/s41467-024-47618-5
Patrilineal segmentary systems provide a peaceful explanation for the post-Neolithic Y-chromosome bottleneck
the male effective population size of these populations (estimated from the paternally transmitted Y chromosome) underwent a severe bottleneck around 5000 years ago.
fijaos en cinta y sus amigos, encontraréis que son un poco "borbones" (los tipos, las tipas menos... bueno, las que no tapan con velos y tal para no salir mal paraos...)
en realidad, no habla de los amigos de cinta, sino de los indoeuropeos de hace 5000 años
la movida es que las explicaciones a la falta de diversidad del cromosoma Y se debe a "genocidios" (en plan los hunos arrasando todo hasta roma y esas cosas)
Several authors have pointed out that the interpretation of patterns in human genetic diversity needs to take into account fine-scale socio-cultural factors highlighted by archaeological and anthropological studies. The first socio-cultural model proposed to explain the Y chromosome bottleneck involved violent competition between patrilineal kin groups and the killing of large numbers of men. Thus, Zeng et al. simulated a human population structured into competing patrilineal kin groups. In this model, kin groups—referred to as descent groups in the present article, following Fox’s terminology—are genetically homogeneous for the Y-chromosome because men in the same group share a recent common paternal ancestor. Violent competition between these different patrilineal groups results in the extinction of certain groups. By increasing the rate of loss of Y-chromosomal lineages and accelerating genetic drift, it induces a severe decrease of Y-chromosome diversity.
pero los autores del paper han dicho que igual eso no es del todo satisfactorio, ya que las sociedades de cazadores-reclectores no son violentos (que sepamos) y los sedentarios en ciudades y tal, presentan ciertas inconsistencias en cuanto a periodos de violencia (hubo picos en las edades de bronce y hierro, pero no correlacionan bien con el estancamiento del cromosoma Y)
hay una respuesta más satisfactoria:
patrilocality, a residence rule whereby a married couple settles in the house of the husband or his father, has been shown to reduce local Y-chromosome diversity compared to mtDNA, because men remain in their native village while women migrate between villages with their mtDNA upon marriage.
On the other hand, matrilocality, the rule according to which the couple settles near the wife’s place of birth, is known to reduce diversity on mtDNA compared to the Y chromosome within groups
Here we test the hypothesis that the Y-chromosome bottleneck is the result of a global shift towards patrilineal systems, associated with the transition to new subsistence systems on all continents over the past 12,000 years.
We can therefore assume that the emergence of agro-pastoralism was accompanied by a change in the kinship system through the practice of patrilineality and patrilocality. Two main hypotheses have been advanced to explain the relationship between subsistence strategies and kinship systems. According to structural functionalists, patrilocality and patrilineality arise when resources can be accumulated.
pamm!!
aquí lo tenéis, la acumulación capitalista y el patriarcado, de la mano, produce regresión en el cromosoma Y
cómo os quedáis??
por cierto, los juden son matrilineales (no matrilocales), aquí os lo lanzo
