Browsing by Author "Radha Devi, D S"
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Item Diallel analysis in rice bean(Vigna umbellata( Thunb.) ohwi & ohashi)(Department of Plant Breeding and Genetics, College of Agriculture, Vellayani, 1999) Preeti, S V; Radha Devi, D SItem Gamma rav induced variations in fruit quality of banana [Musa (Aab) Nendran](Kerala Agricultural University, 1996) Radha Devi, D S; Nayar, N KItem Genetic analysis of yield and mosaic resistance yard long bean(Vigna unguiculata ssp. sesquipedalis (L) verde.)(Department of Plant Breeding and Genetics, College of Agriculture, Vellayani, 2005) Lovely, B; Radha Devi, D SItem Induced mutations in banana var. Nendran(Department of Agricultural Botany, College of Agriculture, Vellayani, 1990) Radha Devi, D S; Krishnan Nair, NThe present investigations was carried out in the Department of Agricultural Botany, College of Agriculture, Vellayani during 1985-88 and in the plant tissue culture Laboratory attached to the Department of Plantation Crops, College of Horticulture, Vellanikkara, Thrissur during 1986-88. The project was taken up to standardise the techniques for induced mutagenesis in-vitro and in-vitro in banana (Musa paradiciaca L.) var. nendran and aslo to analyse the direct effect of 60 Co gamma rays on growth and bunch characters in the vM1 and vM3 generations. One, two and three months old suckers of various sizes (after removal of 25 to 75 per cent of the pseudostem) were exposed to 1.0, 1.5, 2.0, 2.5 and 3.0 kR gamma rays. For in-vitro mutagenesis, isolated shoot tips were exposed to 0.50, 0.75, 1.00, 1.25 and 1.50 kR gamma rays. Ex-vitro analysis of five plants per treatment per exposure was done in the vM1 generation for various growth, bunch and fruit characters.Item Influence of nitrogen on the partitioning of assimilates between panicle and leaves in upland rice varieties(Kerala Agricultural University, 1984) Radha Devi, D S; Gopinathan Nair, NItem Mutagenicity of gamma rays and EMS on winged bean (Psophocarpus tetragonolobus (L.)(Department of Plant Breeding and Genetics, College of Agriculture, Vellayani, 1995) Deepa, T O; Radha Devi, D SItem New morphotypes isolated after EMS treatment in winged bean (Psophocarpus tetragonolobus [L.] D.C.)(Kerala Agricultural University, 2000) Deepa, T O; Radha Devi, D SA field experiment to study mutagcnicity in winged bean, variety PT-62 was carried out at the College of Agriculture Vellayani, Trivandrum. The seeds were treated with five doses of EMS (40, 80, 120, 160 and 200 mM). The mutagenicity assessed based on morphological variations in the M2 generation revealed that 200 millimole of EMS was the most mutagenic. A wide spectrum of viable mutants with change in leaf, stem, pod and seed characters were isolated.