The genetics of the branching pattern on the cotyledonary laterals of peanuts (Arachis hypogaea L.) was studied through scoring F1 and F2 generation progenies from crosses among four lines of Virginia, Valencia, and Spanish types. With one exception, these lines traced directly to gene centers in South America. When results were expressed as the ratio of reproductive branches to total branches (R/R+V), the F2 from crosses of Virginia × Valencia gave a continuous distribution with the median near that of a Spanish type. Spanish × Virginia crosses gave a continuous distribution in the F2 with the median equivalent to the Virginia parent. These results suggested that Spanish varieties may have originated from hybridization of Virginia and Valencia types. The presence, or absence, of inflorescences in the mainstem leaf axils of F2 plants was scored for one cross. The results suggested the presence of two sets of duplicate loci with epistasis among the alleles.
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Keywords: peanuts, Subspecies, Infraspecific, Reproductive branching, Vegetative branching, Groundnuts
How to Cite:
(1975) “Inheritance of Branching Pattern in Arachis hypogaea L.¹”,
Peanut Science 2(1),
31 Dec 1974
1Paper Number 4396 of the Journal Series of the North Carolina Agricultural Experiment Station, Raleigh, N. C. 27607. Part of a thesis presented by the author in partial fulfillment of the requirements for the PhD degree, North Carolina State University, Raleigh, N. C. 27607.