Abstract
Abstract Four populations of inbred backcross lines of common bean (Phaseolus vulgaris L.), developed from crosses between ‘Sanilac’, the recurrent parent, and 4 donor parents (‘BBL 240’, 15R-148, ‘Swedish Brown’, and PI 229815), were analyzed for total seed protein percentage. In each population a substantial number of lines having significantly higher protein levels than ‘Sanilac’ were recovered. The basis for enhanced protein percentage was attributed to increased amounts (g/seed) of phaseolin and nonphaseolin protein, either singularly or together, and either with or without a decrease in the nonprotein seed fraction. Lines from different populations were characterized by different combinations of altered levels of the various seed fractions. Although seed size varied depending on the seed fractions present, no obviously shriveled seeds were observed. Lines having enhanced protein and seed yields comparable to or greater than the recurrent parent, ‘Sanilac’ were recovered.
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