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The Journal of Heredity 2001:92(1)
© 2001 The American Genetic Association 92:86-89

Brief Communication

Parental Effects in the Inheritance of Nonnodulation in Peanut

M. Gallo-Meagher, K. E. Dashiell, and D. W. Gorbet

From the Agronomy Department, P.O. Box 110300, University of Florida, Gainesville, FL 32611-0300 (Gallo- Meagher), IITA, PMB 5320, Ibadan, Nigeria (Dashiell), and Agricultural Research and Education Center, University of Florida, Marianna, FL 32446 (Gorbet).

A nonnodulating line (M4-2) and three normal nodulating lines (UF 487A, PI 262090, and Florunner) of peanut (Arachis hypogaea L.) were crossed in full diallel to investigate the inheritance of nodulation. Data from F1, F2, F3, F1BC1, and F2BC1 generations indicated that three genes control nodulation at three independent loci, with nodulation being a product of two genes and inhibited by a third gene when it is dominant and the others are homozygous recessive. A genetic model has been proposed that describes the nonnodulated genotypes as n1n1n2n2N3N3 or n1n1n2n2N3n3 and all other genotypes as normally nodulated except n1n1N2n2N3-, which has reduced nodulation when the n1n2N3 male gamete unites with the n1N2_ female gamete or when the n1n2n3 male gamete unites with the n1N2N3 female gamete.


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