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The Journal of Heredity 1998:89(1)
© 1998 The American Genetic Association 89:50-53

Interaction of flesh color genes in watermelon

WR Henderson, GH Scott, and TC Wehner

Department of Horticultural Sciences, North Carolina State University, Raleigh, NC 27695-7609, USA

Watermelon [Citrullus lanatus (Thunb.) Matsum. & Nakai] flesh color is controlled by several genes to produce red, orange, salmon yellow, canary yellow, or white. The objective of these experiments was to study the interaction of three independently reported gene loci, each having two or three alleles: C (canary yellow) versus c (red), y (salmon yellow) versus Y (red) versus Yo (orange), and i (inhibitory to C) versus l (noninhibitory to C). The interaction of C, y, yo, and i is of interest to those developing new cultivars of watermelon and has not been reported previously. Five crosses were used to study gene action: Yellow Baby x Tendersweet Orange Flesh, Yellow Doll x Tendersweet Orange Flesh, Yellow Baby x Golden Honey, Yellow Doll x Golden Honey, and Yellow Baby x Sweet Princess. Based on performance of PA, PB, F1, F2, BC1A, and BC1B, the parents have the following genotypes: Yellow Baby = CCYYII, Yellow Doll = CCYYII, Tendersweet Orange Flesh = ccyoyoII, Golden Honey = ccyyII, and Sweet Princess = ccYYii. Segregation of flesh color in the progeny of the five families supported the previous report of a multiple allelic series at the y locus, where Y (red) was dominant to yo (orange) and y (salmon yellow). In conclusion, epistasis is involved in the genes for major flesh colors in watermelon, with ii inhibitory to CC (canary yellow), resulting in red flesh, and CC (in the absence of ii) epistatic to YY, producing canary flesh.


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Home page
 J HeredHome page
G. Gusmini and T. C. Wehner
Qualitative Inheritance of Rind Pattern and Flesh Color in Watermelon
J. Hered., March 1, 2006; 97(2): 177 - 185.
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