cpo and 5’ sequences used for neutrality tests.

A: details regarding the two genomic regions amplified, sequenced and analysed. Their length is reported in base pairs. N: number of individuals sequenced. Details of the four populations analysed. Latitude in degrees North. N: number of sequences analysed for the 5’ and polymorphic cpo region (referred to as 5’ and cpo respectively). B: indel polymorphisms in the cpo and 5’ regions. Values calculated with DNAsp v5.10.01, using multiallelic model (all alleles are considered, also the ones which overlap in sequence). Mean indel length event is calculated averaging the length of every indel event in the alignment. Mean indel is calculated considering every indel event in each sequence. Values are in nucleotides. C. Results of the Tajima’s and Fu and Li’s test statistic. Results including and not including indels presented.* p