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Variation and correlations among agronomic characters in a collection of beans (Vicia faba L.)

SUMMARY Sixteen cultivars of beans (Vicia faba L.) were evaluated in a triple lattice experiment over 2 years. Differences among and within minor and equina groups were significant for most of the measured traits. In general, among equina and minor groups, the variability of means for yield components was higher than the variability for seed yield per plant. Most European cultivars were lower in yield potential and in number of branches per plant, taller and later in maturity than North African cultivars. Significant positive correlations were found for seed yield per plant with weight of pods per plant and with number of pods per plant. These results indicate their value for improvement by indirect selection for seed yield. On the other hand, significant positive correlations were also obtained between number of seeds per pod and pod length and between number of seeds per pod and 100-seed weight. The correlation coefficients for height and number of days to maturity with seed yield per plant were negative but insignificant. Other correlation coefficients were also insignificant and low in magnitude.