Microevolution Processes in Fieri Population as Estimated by Isonymy Techniques

Abstract

The genetic structure of Fieri population was analyzed through the distribution of surnames obtained by a sample of
3’471 marriages registered in the period 1946-2006. The data were recorded for every five years starting from 1946 (than 1951,
1956 and so on) to 2006. Estimations of Fisher’s ?, an indicator of richness of surnames, and ? of Karlin-McGregor, indicator of
migration rates, were obtained for both natives and immigrants. These indicators showed higher values in immigrants. The same
was demonstrated even by log2k-log2S regression line. Two different estimations of relationships between all possible
combinations of cohorts born in nine different decades were obtained through Euclidean distance and Lasker’s coefficient of
relationship, respectively. Comparisons of Ft, coefficient of total inbreeding and Fisher’s ? indicated that any decrease of Ft was
followed by an increase of ? as the result of recent migration.