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Twinning and Inbreeding in India: The Fraternal Component

Published online by Cambridge University Press:  01 August 2014

H.K. Goswami
H.K. Goswami*
Affiliation:
Department of Genetics, University of Bhopal, India
*
Department of Genetics, Bhopal University, Bhopal 462026, India

Abstract

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It is suggested that the rise in a population depends not only on the number of females per thousand males, their fecundability, and the survival of offspring (mean live births), but also on the genetic background or inbreeding status of the fetuses. Abortions and stillbirths add to the interference. A hypothetical formula has been devised , where Mb = mean birth rate, G = growth percentage of population sample from preceding Census, F = inbreeding coefficient, Sa = Stillbirths + abortions, and Sr = Sex ratio. It is intriguing that the product, being termed Fraternal Component (FC), is found to be almost equal to the DZ twinning rate of the population sample. Should that be confirmed, one could perphaps estimate the DZ twinning rate by an altogether new approach.

Keywords

Twinning ratesInbreedingFertility
Type
Research Article
Information
Acta geneticae medicae et gemellologiae: twin research , Volume 36 , Issue 3 , July 1987 , pp. 343 - 347
Copyright
Copyright © The International Society for Twin Studies 1987

References

REFERENCES

1.Bulmer, MG (1970): The Biology of Twinning in Man. London: Clarendon Press.Google Scholar
2.Census of India (1981) Series 11. Madhya Pradesh.Google Scholar
3.Gedda, L, Parisi, P (1970): The impact of inbreeding on human fertility. Proceedings of the VI World Congress on Fertility and Sterility. Jesuralem: The Israel Academy of Sciences and Humanities.Google Scholar
4.Darlington, CD (1961): Cousin marriage and population structure. Eugen Rev 53:139–144.Google Scholar
5.Goswami, HK (1970): Frequency of consanguineous marriages in Madhya Pradesh. Acta Genet Med Gemellol 19:486–490.Google Scholar
6.Goswami, HK (1970): Studies on Twins IV: Twinning in Madhya Pradesh. Acta Genet Med Gemell 19:465–471.Google Scholar
7.Goswami, HK, Wagh, KV (1975): Twinning in India. Acta Genet Med Gemellol 24:347–350.CrossRefGoogle ScholarPubMed
8.Goswami, HK (1983): Genetics and Public Health: Some Considerations in Indian Context. In Goswami, HK (ed): Genetics and Public Health. Ranchi: Catholic Press.Google Scholar
9.Parisi, P, Caperna, G (1981): The changing incidence of twinning: one century of Italian statistics. In Gedda, L, Parisi, P, Nance, WE (eds): Twin Research 3: Twin Biology and Multiple Pregnancy. Alan R Liss, pp 35–48.Google Scholar