REPORT OF SOME LEAF PHENOTYPE MUTANTS IN BRASSICA JUNCEA L. COSS. and CZERN VARIETY RLM 198

Abstract

Chemical mutagenesis of seeds with 0.5% EMS has yielded some leaf shape mutants in Brassica juncea L. Coss. and Czem. variety RLM 198. These mutants are designated as 51 type (simple leafl, 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 51 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.