PM un-reproducible probe sequences (UPS) for the different species or groups of species. Results are detailed for each species or group of species and for CV over 0.5, 0.75 and 1. Freq details the probability of a sequence to present a CV over each boundary. NRR corresponds to non-random range and specifies the number of samples with a CV over a defined value (0.5, 0.75 and 1) in a given sequence that cannot result from a random distribution of the hybridization values in each species of group of species. Seqs specifies the number of sequences yielding poorly reproducible hybridization in each species or group of species. On the right side there is a graphic representation of the distribution of the UPS in the different species and groups of species. Detailed description of the calculi and the intermediate data can be obtained from the Additional file 6.