Inheritance of a Variegated Testa Color in Peanuts1
- W. D. Branch and
- Ray O. Hammons2
Testa color in peanuts, Arachis hypogaea L., has a subjective value for market quality, and an understanding of testa color inheritance is prerequisite to breeding cultivars acceptable for marketing. The genetic relationship between two solid testa colors (pink and red) and their interaction with variegated (red/white) testa were investigated with progenies from intrasubspecific crosses involving nine parents. The variegation gene, V, was expressed as incompletely dominant to solid color and a 1:2:1 ratio was obtained from red ✕ red/white crosses. The pink ✕ red testa crosses gave the 1:2:1 ratio for the R2 locus, In crosses of peanuts with pink ✕ red/white testa, the F2 segregation fit the 1:2:1:2:4:2:1:2:1 phenotypic, also genotypic, ratio — the distribution expected from two independent loci with incomplete dominance for each gene pair. The nine genotypes were: R2R2vv, R2R2Vv, R2R2VV, R2r2vv, R2r2Vv, R2r2VV, r2r2vv, r2r2Vv, r2r2VV. Linkage was not detected between any of the testa colors investigated.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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