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Plant Introduction (PI) accession 507984 of common bean  (Phaseolus vulgaris  L.) has partly colored seed coats and either pure white flowers or light laelia flowers. Crosses were made with white-flowered plants of PI 507984: white-flowered plant #1 × the genetic stock  t ers ers2  BC 2  5-593 and white-flowered plant #2 × recurrent parent dry bean breeding line 5-593. Inheritance was studied in the F 1 , F 2 , and F 3  of the former cross and the F 1  and F 2  of the latter cross. PI 507984 (white flower, plant #1) ×  t ers ers2  BC 2  5-593 gave F 1  plants with colored flowers and partly colored seeds. The F 2  gave a 9:7 segregation ratio (colored flowers to white flowers), and the genetic model proposed is that flower color is restored in the presence of  t/t  by two complementary genes,  Fcr  and  Fcr-2 . That model was confirmed by F 3  progeny tests of 21 F 2  parents with colored flowers. The cross PI 507984 (white flower, plant #2) × 5-593 gave an F 2  segregation ratio of 9:3:4 (bishops-violet: light laelia: white flowers), indicating that the white-flowered PI 507984 has  v  lae  masked by  t . Analysis of all the data suggests that PI 507984 is heterogeneous at  Fcr  and  Fcr-2,  having all three possible homozygous genotypes,  viz ., either light laelia flowers from  v  lae   t Fcr Fcr-2  or white flowers from  v  lae   t Fcr fcr-2  or  v  lae   t fcr Fcr-2. The  flower color restoration gene in 5-593 is arbitrarily assigned the symbol  Fcr . Great variability occurs in partly colored seeds of PI 507984 due to the environment in which the seed was produced.

Interaction of Two Genes, Fcr and Fcr2, with the t Allele in Common Bean that Restores Color to Flowers