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Correlations between circadian period and geographical origins of accessions. Correlation of mean circadian period to latitude (A, D, and G), longitude (B, E, and H), and altitude (C, F, and I) recorded for accession collection sites at 12° (A–C), 22° (D–F), and 27° (G–I). Correlation (R2) and probability (P) indicated for significant correlations. Data were plotted at an intermediate value for latitude, longitude, and altitude measurements recorded as ranges (see Table 1).
