VARIATION IN CALCIUM-CONCENTRATION AMONG 60 S-1 FAMILIES AND 4 CULTIVARS OF SNAP-BEAN (PHASEOLUS-VULGARIS L)

To assess nutritional potential, pod yield, and Ca concentration of po ds and foliage were determined for a snap bean population, which inclu ded sixty S-1 families plus four commercial varieties, The experimenta l design was an 8 x 8 double lattice, repeated at two locations (Arlin gton and Hancock, Wis.), Snap beans were planted in June 1993 and mach ine harvested in August 1993, Calcium analyses were made using an atom ic absorption spectrophotometer, Significant differences were detected in pod Ca concentration and yield among the S-1 families, Pod size an d Ca concentration were inversely correlated (R(2) = 0.88), Distinct d ifferences between the locations were not observed, and higher Ca geno types remained high regardless of location or pod size, Low correlatio n (R(2) = 0.21) between pod and leaf Ca concentration was found. Pods of certain genotypes appeared to have the ability to import Ca more ef ficiently than others, but this factor was not related to yield.