The dataset is made of sizes in base pairs of Abies alba individuals from populations growing in the French Pyrenees and adjacent locations (Massif Central, southern Alps and Corsica). Information for each sample is given in two consecutive rows, one for allele 1 and the second for allele 2 (where appropriate). Data can be used for population genetic studies. Column descriptions: - Column "Sample": code name of the sample. - Column "Population": code name of the population. - Columns "LAT and LONG": geographical coordinate of each population (in decimal degrees). - Column "allele": name of allele (either 1 or 2) for which a size in base pairs is given (the biallelic genotype of each individual is given over two consecutive rows). - Column "SF1, SF333, SF50, SF78, SFb4, SFb5, NFF3, NFF7, NFH15 and NFH3": size in base pairs of nuclear microsatellites (nuSSR). - Columns "cpssr71936, cpssr30141 and cpssr15169": size in base pairs of chloroplast microsatellites (cpSSR). The database includes 3369 rows including the header row