STATUS OF THE GENETIC STATUS OF TRIBALS AND THEIR INTRA AND INTER POPULATION VARIATION IN DISTRICT MADHEPURA (BIHAR)

Abstract

The two predominant tribal populations namely Munda and Oraon of Bihar  have been studied in respect of their reproductive adaptability and frequency distribution of certain somatoscopic and genetic characters.

Reproductive adaptability has been studied on the basis of the parameters of marriage practices like age of parents at the time of marriage and matrimonial distance. Certain natural phenomenon like age at menarche, waiting time, fertility, primary sterility, twining have been studied on a comparative basis. Preadolescent mortality and net reproductive index have been recorded and finally selection intensity in the two populations has been calculated which comes to very comparable figures of 0.344 in Munda and 0.337 in Oraon.

Key words: Munda, Oraon, Reproductive adaptability