pnut pnut Peanut Science 0095-3679 0095-3679 American Peanut Research and Education Society 10.3146/i0095-3679-18-2-12 Articles A Note on Testcrosses Between Tan or Pink Testa Color and Recessive Red Peanut Genotypes1 W. D. Branch * and C. C. Holbrook 2 Professor of Agronomy, UGA and Research Geneticist, USDA-ARS, Coastal Plain Experiment Station, Tifton, GA 31793

1Contribution of the University of Georgia, College of Agriculture and the U.S. Department of Agriculture, Agricultural Research Service.

 *Corresponding author. 7 1991 18 2 109 110 3 8 1991 American Peanut Research and Education Society 1991 American Peanut Research and Education Society Abstract

Phenotypically distinguishing between tan and pink peanut (Arachis hypogaea L.) testa color can be difficult. Genetic separation was attempted by testcrosses with homozygously recessive red testa genotypes (r2r2, r3r3). The recessive red testa color was found to differ from all of the following pink and tan cultivars: Sunbelt Runner, Southern Runner, Starr, Toalson, and the tan colored Krinkle-leaf genotype (F1F2D1D2r1) by only one of the two recessive red loci. Even though these results show that testcrossing to recessive red genotypes is not a viable approach for discerning tan versus pink testa color, it does suggest that several peanut cultivars already carry one recessive red gene.

 Key Words Arachis hypogaea L; , groundnut; , seedcoat color inheritance; , cultivars