Methods using natural outcrossing were developed for testing the genetic bases of flower color variants from natural populations ofLupinus nanus. Six flower color variants were described and named white, white-crinkle, faint-blue, light-blue-stripe, pink, and lavender. Each was found to be a simple Mendelian recessive to the dominant blue flower color characteristic of the species. Intercrosses among the six recessive genotypes established that the genes for the different colors were not allelic. The loci were designatedB/bfor white,Bc/bcfor white-crinkle,F/ffor faint-blue,A/afor light-blue-stripe,P/pfor pink, andL/lfor lavender.
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