mtDNA diversity in the Chad Basin.

NOTE: n  =  sample size; k  =  number of different sequences; S  =  number of segregating sites; h  =  haplotype diversity; π  =  nucleotide diversity; M  =  average number of pairwise differences (mismatch observed mean). For all of the samples, the common segment of the HVS-I region analyzed ranges from position 16030 to 16370 (with the exception of samples #Fa108 and #Hi14 that present sequence ranges outside 16030–16370 and were therefore eliminated from the analysis; see Table S2).