* A minimum of 6 repeat units (r.u.) for dinucleotides, 4 r.u. for trinucleotides, and 3 r.u. for tetra-, penta-, hexa-, hepta-,and octanucleotides were used as parameters for searching microsatellites in genomic and EST sequence of carrot. Chi-square distributions indicate observed SSR motif types inside versus outside ORFs as compared to posterior probabilities. χ2 = chi-squared statistic; df = degrees of freedom. Observed distributions generally fit those expected (p ≥0.05) except for tetranucleotides for GSSRs (from a hybridization-based enrichment of genomic library), and trinucleotides for BSSRs (from BAC end sequence). For ESSRs (from ESTs) the observed distributions only fit expected ones for tri-, penta-, and hexanucleotide repeats, with observed occurrence of di- and tetranucleotide repeats occurring much more often outside ORFs than expected.