Linkage Between Loci Controlling Nodulation and Testa Variegation in Peanut

Linkage of loci controlling nodulation (N 1 ) and testa variegation (V) was studied for cultivated peanut (Arachis hypogaea L.). The lines M4-2 (nonnodulating, variegated; VVn 1 n 1 n 2 n 2 N 3 N 3 ) and UF 487A (nodulating, nonvariegated; vvN 1 N 1 n 2 n 2 N 3 N 3 ) were used as parents in the crosses M4-2 x UF 487A, M4-2 x (UF 487A x M4-2), and their reciprocals. Individual plants were evaluated for nodulation and testa variegation in the F 1 , F 2 , F 3 , F 1 BC 1 , and F 2 BC 1 generations. Data indicate that the N 1 and V loci are linked with calculated crossover percentage of 7.1%.