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Journal of Heredity 2004:95(3):268-270
© 2004 The American Genetic Association

Brief Communication

Inheritance of Egusi Seed Type in Watermelon

G. Gusmini, T. C. Wehner, and R. L. Jarret

From the Department of Horticultural Science, North Carolina State University, Raleigh, North Carolina (Gusmini and Wehner) and USDA-ARS, Plant Genetic Resource Unit, 1109 Experiment St., Griffin, GA 30223 (Jarret).

Address correspondence to T. C. Wehner at the address above, or e-mail: todd_wehner{at}ncsu.edu.

An unusual seed mutant in watermelon (Citrullus lanatus var. lanatus) has seeds with a fleshy pericarp, commonly called egusi seeds. The origin of the phenotype is unknown, but it is widely cultivated in Nigeria for the high protein and carbohydrate content of the edible seeds. Egusi seeds have a thick, fleshy pericarp that appears during the second to third week of fruit development. We studied the inheritance of this phenotype in crosses of normal seeded Charleston Gray and Calhoun Gray with two plant introduction accessions, PI 490383w and PI 560006, having the egusi seed type. We found that the egusi seed type is controlled by a single recessive gene, and the symbol eg was assigned.


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