Demographic Structure of a Small Genetic Isolate in Karnataka — South India

S. Yaseen Saheb

doi:10.18778/1898-6773.49.1-2.14

Authors

S. Yaseen Saheb Anthropological Survey of India, Southern Region

DOI:

https://doi.org/10.18778/1898-6773.49.1-2.14

Abstract

Amma Kodava są grupą endogamiczną liczącą około 2000 osób zamieszkujących górzysty teren okręgu Kodagu w stanie Karnataka. Populacja ta znajduje s:ię w przejściowej fazie jeśli idzie o przyrost naturalny. Uwidacznia się to w jej strukturze płci i wieku. Średnia liczba urodzeń w rodzinach o zakończonym cyklu reprodukcyjnym wynosi 4,20, a liczba dzieci dożywających dorosłości 3,94. Składniki I_f i I_m wskaźnika sposobności do selekcji Crowa [1958] wynoszą odpowiednio: 0,25 i 0,06. Ogólna wartość tego wskaźnika równa jest 0,33. Proporcja przepływu genów wynosi 0,856. Wskaźnik izolacji rozrodczej zmienia się od 3,53% do 5,19%. Wskaźnik dryfu genetycznego ma wartości od 0,00041 do 0,00061. Średnia odległość małżeńska wynosi 10,45 mili. Wskaźnik wsobności dla loci autosomalnych 0,002684 jest niższy niż w większości południowoindyjskich populacji. Nie stwierdzono żadnego istotnego wpływu kojarzeń wsobnych na płodność i wymieralność.

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