Image-Based High-Throughput Detection and Phenotype Evaluation Method for Multiple Lettuce Varieties.

The correlation coefficients between phenotypic traits of lettuces are shown in Table 3 , with most traits showing extremely significant positive correlations between each other ( P < 0.01), but the correlation coefficients between geometric and color traits were less than 0.5, indicating that the geometric and color traits of lettuce differed in how they described the growth and appearance of lettuce.

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