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Mineral contents in seed coat and canning quality of selected cultivars of dark red kidney beans (Phaseolus vulgaris L.)

Wu, X.J., James, R., Anderson, A.K.
Journal of food processing and preservation 2005 v.29 no.1 pp. 63-74
kidney beans, Phaseolus vulgaris, cultivars, testa, canning, canning quality, food composition, chemical analysis, mineral content, ash content, sodium, calcium, iron, potassium, magnesium, Wisconsin
Three different dark red kidney bean (Phaseolus vulgaris L.) cultivars (cvs. 85, 453 and Nickols) grown in Wisconsin were studied to investigate the correlations of the mineral contents in the seed coat and seed coat splits in the canned beans. In the canned product, highly significant differences (P < or = 0.01) in percentage of split seed coats were observed among the three cultivars studied. Canned cultivar 85 significantly showed fewer seed coat splits than the other two cultivars. Significant negative correlations were observed between the percentage of seed coat splits and sodium (r = -0.89, P < or = 0.01), calcium ( r = -0.74, P < or = 0.01) and iron (r = -0.79, P < or = 0.05) contents in the seed coat. This study suggested that the mineral content of the seed coat of kidney beans may play important roles in the integrity of the seed coat during thermal processing.