Thumbnail Image

University of Agricultural Sciences, Bengaluru

University of Agricultural Sciences Bangalore, a premier institution of agricultural education and research in the country, began as a small agricultural research farm in 1899 on 30 acres of land donated by Her Excellency Maharani Kempa Nanjammanni Vani Vilasa Sannidhiyavaru, the Regent of Mysore and appointed Dr. Lehmann, German Scientist to initiate research on soil crop response with a Laboratory in the Directorate of Agriculture. Later under the initiative of the Dewan of Mysore Sir M. Vishweshwaraiah, the Mysore Agriculture Residential School was established in 1913 at Hebbal which offered Licentiate in Agriculture and later offered a diploma programme in agriculture during 1920. The School was upgraded to Agriculture Collegein 1946 which offered four year degree programs in Agriculture. The Government of Mysore headed by Sri. S. Nijalingappa, the then Chief Minister, established the University of Agricultural Sciences on the pattern of Land Grant College system of USA and the University of Agricultural Sciences Act No. 22 was passed in Legislative Assembly in 1963. Dr. Zakir Hussain, the Vice President of India inaugurated the University on 21st August 1964.

Browse

2019 - 201912020 - 20222
Reset filters
Subject: Sericulture × Author: CHANDRAKALA × Start date: 1970 × Type: Thesis ×
Reset filters

Search Results

Now showing 1 - 3 of 3
  • Thumbnail Image
    ThesisItemEmbargo
    GENETICS OF WHITE MUSCARDINE DISEASE RESISTANCE IN THERMOTOLERANT BIVOLTINE SILKWORMS (Bombyx mori L.)
    (2022-12-30) CHANDRAKALA; MANJUNATH GOWDA
    Three thermotolerant bivoltine silkworm breeds viz., B1, B4 and B8 were crossed with CSR4 to study the genetics of white muscardine disease resistance using six generation mean analysis and disease scoring using mean, geometric and hormonic productivity. The fifth instar silkworms were topically inoculated with muscardine fungus (9.04 × 104 spores / ml @ 0.5 ml per silkworm) and assessed. Cocoon, shell, pupal and filament weights showed high heritability (h2) and high genetic advance (GA) and larval duration, cocoon yield by weight, shell ratio, pupation rate and filament length showed high h2 and low GA both under normal condition and muscardine inoculation. Six generation mean analysis for the five quantitative traits viz., larval, cocoon, pupal and shell weights and shell ratio, revealed inadequacy of additive-dominance model indicating epistatic digenic interactions both under normal condition and muscardine inoculation. Duplicate-type epistasis played a greater role than complementary epistasis for all the five traits under normal condition. Under muscardine inoculation complementary epistatic gene action was observed for larval, cocoon and pupal weights. The magnitude of additive gene effects [d], additive genetic variance (σ2A), dominance gene effects [h] and dominance genetic variance (σ2D) under muscardine inoculation indicated significant epistatic gene action in controlling these traits. The disease scoring for B. bassiana infection revealed that B1 × CSR4 and B4 × CSR4 hybrids showed high resistance in terms of larval and shell weights and resistance in terms of cocoon weight and shell ratio implying they being resistant hybrids and among the parents, B1 and B4 showed resistance in terms of larval and shell weights and shell ratio while moderate resistance in terms of cocoon and pupal weights. Thus, B1 and B4 can be considered as muscardine disease resistant thermotolerant bivoltine silkworm breeds. Further, the genetic parameters revealed that, hybridization and selection in later generations may yield desired results to improve muscardine disease resistant in these breeds.
  • Thumbnail Image
    ThesisItemEmbargo
    GENETICS OF WHITE MUSCARDINE DISEASE RESISTANCE IN THERMOTOLERANT BIVOLTINE SILKWORMS (Bombyx mori L.)
    (University of Agricultural Sciences, Bangalore, 2022-12-18) CHANDRAKALA; MANJUNATH, GOWDA
    Three thermotolerant bivoltine silkworm breeds viz., B1, B4 and B8 were crossed with CSR4 to study the genetics of white muscardine disease resistance using six generation mean analysis and disease scoring using mean, geometric and hormonic productivity. The fifth instar silkworms were topically inoculated with muscardine fungus (9.04 × 104 spores / ml @ 0.5 ml per silkworm) and assessed. Cocoon, shell, pupal and filament weights showed high heritability (h2) and high genetic advance (GA) and larval duration, cocoon yield by weight, shell ratio, pupation rate and filament length showed high h2 and low GA both under normal condition and muscardine inoculation. Six generation mean analysis for the five quantitative traits viz., larval, cocoon, pupal and shell weights and shell ratio, revealed inadequacy of additive-dominance model indicating epistatic digenic interactions both under normal condition and muscardine inoculation. Duplicate-type epistasis played a greater role than complementary epistasis for all the five traits under normal condition. Under muscardine inoculation complementary epistatic gene action was observed for larval, cocoon and pupal weights. The magnitude of additive gene effects [d], additive genetic variance (σ2A), dominance gene effects [h] and dominance genetic variance (σ2D) under muscardine inoculation indicated significant epistatic gene action in controlling these traits. The disease scoring for B. bassiana infection revealed that B1 × CSR4 and B4 × CSR4 hybrids showed high resistance in terms of larval and shell weights and resistance in terms of cocoon weight and shell ratio implying they being resistant hybrids and among the parents, B1 and B4 showed resistance in terms of larval and shell weights and shell ratio while moderate resistance in terms of cocoon and pupal weights. Thus, B1 and B4 can be considered as muscardine disease resistant thermotolerant bivoltine silkworm breeds. Further, the genetic parameters revealed that, hybridization and selection in later generations may yield desired results to improve muscardine disease resistant in these breeds.
  • Thumbnail Image
    ThesisItemOpen Access
    SOIL APPLICATION OF ZINC, IRON AND MANGANESE FOR ENHANCEMENT OF MULBERRY YIELD, QUALITY AND COCOON CROP PRODUCTIVITY
    (UNIVERSITY OF AGRICULTURAL SCIENCES GKVK, BANGALORE, 2019-08-05) CHANDRAKALA; FATIMA SADATULLA, Dr.
    Soil application of zinc, iron and manganese significantly enhanced mulberry yield, quality and cocoon crop productivity. Among the different treatments, T5 (350:140:140 NPK kg/ha/year + FYM 20 t/ha/year + micronutrient formulation of Zn, Fe and Mn @ 6 kg/acre) recorded significantly higher plant height (169.50 and 211.61 cm), shoot height (65.15 and 170.56 cm), number of shoots/plant (30.11 and 30.17), shorter internodal distance (5.13 and 5.14 cm), number of leaves/plant (548.67 and 567.56), leaf area (283.52 and 310.45 cm2), leaf yield (947.20 and 1040.81 g/plant) and leaf dry matter (359.05 and 552.05 g/plant) on 45th and 75th DAP in V1 mulberry. The quality parameters viz., leaf moisture (76.16 %), chlorophyll a and b (1.63 and 0.92 mg/g), crude protein (24.40 %), crude fibre (14.07 %), total carbohydrates (34.66 %), total sugars (16.10 %), leaf N (3.84 %), P (0.45 %), K (1.70 %), Ca (1.71 %), Mg (0.64 %), S (0.55 %), Zn (62.01ppm), Fe (497.17 ppm) and Mn (149.76 ppm) were also found significantly maximum in T5 on 75th DAP. Significantly higher larval weight (37.59 g/10), shorter fifth instar and total larval duration (198.32 and 510.32 h), ERR (98.83%), cocoon weight (87.57 g/50 cocoons), cocoon number/50 worms (49.42), single cocoon weight (1.78 g), single pupal weight (1.39 g), single shell weight (0.39 g), shell ratio (21.69 %), filament length (999.95 m) and NBFL (950.42 m), were significantly higher in T5 treatment with PM × CSR2. Compared to other treatments all the above-mentioned parameters found least in the control.