Standard (or nucleotide) diversity a concept in molecular genetics which is used to measure the degree of polymorphism within a population (i.e it is a measure of genetic variation of population).This concept was introduced by Nei and Li in 1979. This measure is defined as the average number of YSTR differences per site between any two YSTR haplotypes chosen randomly from the sample population, and is denoted by π. The numbers equivalents of all standard diversity indices behave in this intuitive way because they all have the “doubling” property (Hill 1973): if two equally large, completely distinct communities (no shared YSTR haplotypes) each have diversity X, and if these communities are combined, then the diversity of the combined communities should be 2X.
Here, the standard diversity indice of 1.0 simply means that "population" in "sample" don't have shared haplotypes. I'd suggest excluding these "random sets" of populations from the further analysis (and, as you can see, these populations are marked in red colours), because the diversity measures for those pouplations imply the absolute number of polymorphic sites, and absolute gene diversity.
Instead, i'd suggest using the molecular diversity indices (from the second row of the table prsented above) (Intra-deme molecular diversity in spatially expanding populations. Ray N, Currat M, Excoffier L.2003 ), since the sampling location and the geographical location of the expansion have no effect on the pattern of molecular diversity in our homogeneous environment for large Nm values, whereas we observe a slight reduction in genetic diversity for demes that are sampled in the periphery of the simulated population for low Nm values (independent of the origin of the expansion).
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Statistically speaking, the statistical diversity of the Serbian "I2a2" population is equal to that one of the Croatian "I2a2" population(0.9643+-0.0072),which is indicative of symmetrical sampling (i.e both samples exhibit equivalence or correspondence among constituents of I2a2 haplotypes). However, the molecular diversity of the Serbian I2a2 population is significantly higher (0.305 +-0.199 against 0.139+-0.106 in the Croatian sample). From the data presented in my study, we can conclude that the Croatian sample is less diverse than the Serbian sample. This lower diversity (variation)in the Croatian population of I2a2 haplotypes is a reliable indicator of more recent founder effect, for Serbs have more sources of I2a2 diversity compared to Croats.
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It is important to note here that standard diversity of I2a2a haplotypes in Czech republic could be lower than 1.000.
In a often cited paper "Y-Chromosomal Variation in the Czech Republic" authors estimated the diversity of I2a-P37.2 as 0.952 +-0.096ю
However, it seems that they included some I2a1 and I2* haplotypes - hence, the diversity is lower.