Inheritance and molecular mapping of a gibberellin-insensitive dwarf mutant in groundnut (Arachis hypogaea L.)

Abstract

A dark green dwarf mutant, TGM 167, was isolated from a gamma ray + sodium azide mutagenised population of cultivated groundnut breeding line, TFDRG 5. The mutant had a 45.8% reduction in height due to its shorter internodal length. Further, it was found to be insensitive towards exogenous GA 3 application, although it had nearly the same level of endogenous GA 3 as the parent. Genetic analysis revealed that the dwarfism is under the control of a single dominant gene. This dominant dwarfing gene was mapped with an SSR marker TC3H02 at a distance of 9.7 cM. © Institute of Plant Genetics, Polish Academy of Sciences, Poznan 2010.