Iranian Arabs, Baluchis and Sistanis showed very high inbreeding coefficient values (FI ~ 0.0122–0.0132), exceeding those of the most consanguineous 1000G population (STU).
The overall rate of consanguineous marriage was 38.6% with a mean inbreeding coefficient (alpha) of 0.0185. First cousin marriages (27.9%) were the most common form of consanguineous union, with parallel patrilateral marriage especially favoured.
Iran. Cousin marriages are decreasing among Iranians. Since the Pahlavi era fewer Iranians have practised cousin marriages. There is a strong preference for marrying a first cousin, but no specific preference for the father's brother's daughter.
Many studies show that the prevalence of consanguineous marriages among Muslim populations is more than in other populations, worldwide; it is approximately 52%, with an average inbreeding coefficient of 0.0312.
In Islam, marriages between first cousins are permitted. (Surah Nisa Verse 22-24). Cousin marriage is also permitted in many other religions and civilizations.
The Middle East has uniquely high rates of cousin marriage among the world's regions. Certain Middle Eastern countries, including Saudi Arabia, have rates of marriage to first or second cousins that may exceed 70%. Iraq was estimated in one study to have a rate of 33%.
Prohibitions based on consanguinity. Seven relations are prohibited because of consanguinity, i.e. kinship or relationship by blood, viz. mothers, daughters, sisters, paternal aunts, maternal aunts, and nieces (whether sister's or brother's daughters).
Top 9 Countries with the Highest Rate of Inbreeding:
Pakistan - 50%+ Qatar - 50%+ Afghanistan - 40-49% Bahrain - 40-49%
Data on inbreeding in several contemporary human populations are compared, showing the highest local rates of inbreeding to be in Brazil, Japan, India, and Israel.
For instance, some people consider marrying a second cousin to be incest, while others do not. However, the nations of Saudi Arabia and Pakistan are known to have high rates of incest within their populations. Cousin marriage, or consanguinity, is a common practice in the Middle East.
This is a common practice globally in many cultures and countries, but it is far more common in Pakistan than in any other country with a high percentage of 55-60% marrying their first cousins. Consanguine marriages are not only common within Pakistan, but also a practice amongst British Pakistani communities.
In Iran, a man can marry permanently up to four women, with the consent of the previous wives.
There is a general consensus among Sunni and Shia fiqh experts that Surah Al-Baqarah 221 and Surat Al‑Mumtahanah 10 ban Muslim women from marrying non-Muslim men. This consensus is still standing strong. On the other hand, the Quran allows Muslim men to marry non-Muslim women (“People of the Book”).
research on minimum viable population
They created the “50/500” rule, which suggested that a minimum population size of 50 was necessary to combat inbreeding and a minimum of 500 individuals was needed to reduce genetic drift.
The prevalence of consanguineous marriage among the Arab population in Israel increased significantly from 36.3% to 41.6% in the decade from 2007 to 2017. First-cousin and closer marriages constituted about 50% of total consanguineous marriages in the two periods surveyed.
Traditionally, Tasmania has always been lampooned as the most inbred state.
The horrific family history intertwined with incest only began to emerge nearly nine years ago after authorities discovered nearly 40 relatives living in inhumane conditions in an outback bush camp. They lived among an uninsulated shed, old caravans and tents on a New South Wales bush block that was found in 2012.
The study concluded that declines in IQ and the increase of mental retardation are consistent with rare recessive alleles associated with around 325 loci, whose likelihood of being transmitted into offspring increases with the relatedness of the parents.
The Whittaker family is an American inbred family from Egeria, West Virginia. They first gained public notoriety in 2020, when they appeared on the Soft White Underbelly YouTube channel as part of a series of video interviews conducted by Mark Laita. Egeria, West Virginia, U.S.
The closest type of inbreeding is selfing, or self-fertilization, the union of male and female sex cells produced by the same organism. Linebreeding is a form of inbreeding that involves selection of mates on the basis of their relationships to a certain superior ancestor.
Based on that, the daughter of one's paternal uncle or aunt, or of one's maternal uncle or aunt, are permissible in marriage. The Qur'aan states that in the verse (interpretation of the meaning): “O Prophet (Muhammad SAW)!
The prophet ﷺ forbade the marriage to a woman and her paternal aunt or maternal aunt at the same time. Below is a compilation from the scholars who forbid the joining between the two: Ibn Qudama says in Al mughni: It is not permissible for someone to marry a woman and her aunt at the same time.
The Egyptian mullah Mazen Al-Sersawi, said that Islam allows incest between men and their daughters if she is illegitimate. This is because illegitimate daughters are not officially attributed to their fathers and can be married to them.