*A minimum of 6 repeat units (r.u.) for dinucleotides were used as parameters for searching microsatellites in genomic and EST sequence of carrot. Chi-squared distributions indicate comparison of observed SSR distribution of SSR motif types ((AT)n, (AC)n, (CG)n, etc.; (AAC)n, (ACC)n, (ACG)n, etc.) to posterior probabilities. Tests are partitioned by library and sequence motif. χ2 = chi-square statistic; df = degrees of freedom. SSRs were non-randomly distributed across motif types.