variability in 17 flocks of the Sarda sheep breed in the Viterbo province, located in central
Italy. The suitability of samples size and number of loci analysed were tested using a
bootstrap procedure. The data obtained were used to estimate the genetic diversity within
and among flocks, and to test the presence of inbreeding within flocks. To study the genetic
relationship among flocks, a principal component analysis based on Nei standard distances …