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Morphology and Inheritance of Sterile Brachytic Dwarfs in Peanuts, Arachis hypogaea¹

Various morphological manifestations of brachytic dwarfs in peanuts, Anachis hypogaea L., and their inheritance have been studied. It was concluded that two duplicate genes control this trait, although a third locus was indicated in one cross. Apparently modifiers were also involved.

These genes cause marked shortening of the internodes, petioles, flowers and floral organs and other deviations. The plants are male sterile, having no pollen. They are also female sterile, or are unable to support embryo development. The trait demonstrates how undesirable recessive alleles can accumulate in self-pollinating amphiploid species, containing duplicate loci.

Key Words: Amphiploids • Duplicate Genes • Male Sterility • Self Pollinating Species • Zygotic Failure

² Senior Lecturer in Genetics and Plant Breeding. The author is grateful to E. Goldin for seeds of the varieties and to Mrs. V. Barash and U. Aloni for technical assistance.

Received for publication February 5, 1968.