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Table 4 Association between MC1R genotype and black pigmentation in an F2 population

From: The MC1R gene in the guppy (Poecilia reticulata): Genotypic and phenotypic polymorphisms

(1) Body blackness     
MC1R No. of males No. of females
Genotype Grayish Yellowish Grayish Yellowish
+/+ 3 3 2 0
+/Del 10 3 7 4
Del/Del 1 1 4 1
(2) Black traits     
MC1R No. of males No. of females
Genotype Black None Black None
+/+ 3 3 0 2
+/Del 11 2 4 7
Del/Del 2 0 0 5
  1. (1) For body blackness, "Grayish" guppies have black pigmentation and "Yellowish" guppies have no black pigmentation. (2) For black traits, "Black" and "None" indicate the presence and absence of black spots and lines, respectively. (1, 2) All the F2 individuals from two families are included.