Figure 1.

Schematic drawing of shotgun reads for one window. The colored bars represent the reads; each color corresponds to a different individual. For our analysis, the window is subdivided into v different segments, so that the sampling depth of reads is invariable within a segment. For example, in segment r_i, we have sampled five reads, corresponding to three individuals, and two individuals have been sampled twice. Therefore, the minimal and maximal number of chromosomes sampled is n_min = 3 and n_max = 5, respectively.