Deciphering diversity in populations of various linguistic and ethnic affiliations of different geographical regions of India: analysis based on 15 microsatellite markers.

The extent of genetic polymorphism at fifteen autosomal microsatellite markers in 54 ethnically, linguistically and geographically diverse human populations of India was studied to decipher intrapopulation diversity. The parameters used to quantify intrapopulation diversity were average allele diversity, average heterozygosity, allele range (base pairs), and number of alleles. Multilocus genotype frequencies calculated for selected populations were utilized for testing conformity with the assumption of Hardy-Weinberg equilibrium. The exact test values, after Bonferroni correction, showed significant deviation amongst Gowda (vWA, Penta E); Dhangar, Satnami and Gounder (D8S1179); Hmar (FGA); Kuki and Balti (vWA) groups. Relatively low number of alleles and allelic diversity (base-pairs size) had been observed in populations of central India as compared with southern and northern regions of the country. The communities of Indo-Caucasoid ethnic origin and Indo-European linguistic family (Kshatriya of Uttar Pradesh) showed highest allelic diversity, as well as rare alleles, not reported in any other Indian populations. Analysis based on average heterozygosity was also found to be lowest among the populations of central India (0.729) and highest among the populations from north (0.777) and west (0.784) regions of the country, having Indo-Caucasoid ethnic origin and Austro-Asiatic linguistic affiliation. The maximum power of discrimination (85%-89%) had been observed at loci FGA, Penta E, D18S51 and D21S11, suggested high intrapopulation diversity in India. Genetic diversity revealed by STR markers was consistent with the known demographic histories of populations. Thus, the present study clearly demonstrated that the intrapopulation diversity is not only present at the national level, but also within smaller geographical regions of the country. This is the first attempt to understand the extent of diversity within populations of India at such a large scale at genomic level.

Morfología dentaria en la evaluación de la etnicidad poblacional / Evaluation of Population ethnicity based on dental morphology

Las características morfológica dentarias, como diente en pala y tubérculo de Carabelli, han sido ampliamente utilizadas en estudios antropológicos y genéticos, dada su alta heredabilidad. La utilización de marcadores genéticos sanguíneos ha permitido establecer una gradiente sociogenética para la población de Santiago que se ha correlacionado en forma directa con la susceptibilidad de esas poblaciones a las fisuras labiopalatinas. Se determinaron las frecuencias poblacionales de marcadores genéticos morfológicos dentarios y serológicos en tres poblaciones de distintos sectores de Santiago (privado, público y fisurados). Se compararon las distancias genéticas respecto a las poblaciones originarias. Los resultados demuestran una gradiente sociogenética similar a la encontrada con los marcadores serológicos aunque más próximas a las poblaciones indígenas. Se concluye que estos rasgos pueden ser una herramienta útil para la evaluación del grado de miscegenación de una determinada población

Genetic marker profile of primitive Kutia Kondh tribal population of Phulbani district (Orissa).

Blood samples from 330 Kutia Kondhs (a primitive tribal population of Orissa) were subjected to a battery of tests for genetic markers to find out the incidence of various blood group polymorphisms (ABO, MN, Duffy, JKa), serum proteins, sickling and G-6-PD deficiency. Predominance of O (39.09%) blood group for ABO, N blood group (53.44) for MN and Fya+b+ (55.72) for Duffy blood group, were observed. High incidence of Hp2-1 (39.33), SS (70.43) and CC (96.65) for haptoglobulin, C3 and transferrin respectively were seen. The overall frequency of sickling was observed to be 16.36 per cent. The sex-wise distribution of G-6-PD was 13.71 per cent for males and 1.84 for females.