The Indian Journal of Genetics and Plant Breeding

Chemical mutagenesis of seeds with 0.5% EMS has yielded some leaf shape mutants in Brassica juncea L. Coss. & Czem. variety RLM 198. These mutants are designated as sl type (simple leaf), dil type (deeply incised lobe) and G type. Morphological characteristics of these mutants are discussed in this paper. The F₂ data suggests the involvement of two genes in sl type and only one in G type mutants. Significance of such chemically induced leaf shape mutations in the same species are discussed in terms of understanding the generation of leaf as well as plant forms. Also since these mutants develop different canopy structures their importance in attaining a suitable plant type in Brassica is also discussed.