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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.

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2017 - 201912020 - 20221
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Subject: Plant Pathology × Author: AISHWARYA, P. × Start date: 2000 × Type: Thesis ×
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    ThesisItemOpen Access
    CHARACTERIZATION, EPIDEMIOLOGY, HOST PLANT RESISTANCE AND MANAGEMENT OF URDBEAN LEAF CRINKLE VIRUS (ULCV) IN BLACKGRAM (Vigna mungo L. Hepper)
    (University of Agricultural Sciences, Bangalore, 2022-02-17) AISHWARYA, P.; Ramappa, H. K.
    Urdbean Leaf Crinkle Virus (ULCV) is a major threatening disease in blackgram. The biological characterisation of ULCV revealed the sap transmission between 92-100 per cent, seed transmission between 55-95 per cent and Aphis craccivora C.L. Koch transmission upto 100 per cent with 10 minute of Acquisition Feeding Period, 12 and 24 hours of Inoculation Feeding Period with 10 aphids per plant. The host range studies revealed that soybean, field bean, horsegram, cowpea, greengram and weed Euphorbia geniculata to be hosts for ULCV disease. The rate of infection was severe at younger stages upto 35 DAS and reduced at later growth stages upon sap inoculation. Transmission Electron Microscopic observations of ULCV infected blackgram indicated isometric particles with size of 25-30 nm. The ULCV samples of blackgram showed no amplification for any of the primers of potyvirus, geminivirus and viroids. Metagenomic sequencing of ULCV samples showed nucleotide and amino acid identity of 76.44 and 90.66 per cent with Cotesia glomerata bracovirus (putative histone 4 gene) respectively which can be validated further. None of the 124 blackgram genotypes screened under controlled conditions showed resistant reaction for ULCV disease. The minimum (16- 180C) and maximum (32-340 C) temperature range co-related negatively and positively during late Kharif and Summer for ULCV disease incidence respectively. Seed treatment of thiamethoxam 30 % FS @ 10 ml-kg of seeds with neem (oil based) spray 10,000ppm @ 2 ml-L of water at 30, 45 and 60 DAS reduced the ULCV disease incidence compared to control.
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    ThesisItemOpen Access
    IDENTIFICATION OF GENOTYPES AND TAGGING OF AVAILABLE SSR MARKERS LINKED TO BCMV (BEAN COMMON MOSAIC VIRUS) RESISTANCE IN EARLY SEGREGATING GENERATION OF COWPEA [Vigna unguiculata (L.) Walp.] AND EVALUATION OF NATURE OF SEED TRANSMISSION
    (UNIVERSITY OF AGRICULTURAL SCIENCES GKVK, BENGALURU, 2017-07-27) AISHWARYA, P.; Rangaswamy, K. T.
    BCMV has been found to infect large number of crop plants including cowpea and cause substantial yield loss. In this study the reaction of the segregating population of cowpea of selected crosses viz., IC39916 x IT38956-1 and IC39916 x KBC-2 were evaluated to identify resistant lines for further advancement. Further the nature of seed transmission of BCMV was investigated. Out of 200 plants of each cross of F2, 80 plants of cross IC39916 x IT38956-1 and 76 plants of cross IC39916 x KBC-2 showed resistant reaction at 60 DAS. The 2 test results indicated the involvement of complementary gene interaction in both the crosses for the disease reaction. Major yield parameters like number of pods and seed weight per plant of both the crosses showed the involvement of large number of genes with complementary epistasis while average length of the pods showed duplicate gene interaction. Higher estimates of PCV for number of pods and seed weight per plant showed high variability whereas average pod length showed low variability. Among the Simple Sequence Repeats (SSR) markers evaluated (M15, M135, M80 and Y96), the marker Y96 showed polymorphism for disease reaction for parents (IC39916, IT 38956-1 and KBC-2) and F2 population from both the crosses. The BCMV upon DAS-ELISA was found to be internally seed borne in nature. The virus was detected in embryo, cotyledon but not in the seed coat with varied concentrations in embryo and cotyledon, in both C-152 and KBC-2 varieties.