Authors : K. N. SATHAWANE and DONGRE V. S.
Page Nos : 151-153
Description :
Brassica juncea (Linn.)Coss & Czern. Cv. Varuna belongs to family brassicaceae of dicotyledons. It is a major oil yielding crop plant, commonly known as Indian mustard. Since, it contains about 35-40 % oil, it has great importance to Indian economy and stood third rank in oilseed production. In order to induce variabilities, mutations study was undertaken on B. juncea cv. Varuna. Both chemical and physical mutagens were used. Ethyl methane sulfonate , sodium azide and gamma radiations were used as chemical and physical mutagen,respectively.Dry and water pre-soaked (PSW) seeds were treated with different doses of EMS and SA. Dry seeds were exposed to different doses of gamma radiations. Among many induced mutants , Pale Yellow Flower colour was prominent and was recorded in 0.02% M2 mutation frequency in 18h PSW + 6h 0.01% SA treatment dose. Pale Yellow Flower colour mutant was linked with yellow seed coat colour character in B. juncea cv. Varuna . Pale Yellow Flower colour mutant had more proteins and reduced crude fibre, however, the level of glucosinolate and erucic acid remains unchanged . In M3 generation, Pale Yellow Flower colour mutant breeds true.
KEY WARDS: Induced Mutations, Pale Yellow Flower colour, EMS , SA & gamma radiations , Brassica juncea (Linn.)Coss & Czern. Cv. Varuna , yellow seed coat colour.
