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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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Subject: Plant Pathology × Author: SANGEETA SABANNA BHAJANTRI × Start date: 2019 × Type: Thesis × Thesis Type: M.Sc ×
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    ThesisItemOpen Access
    DETECTION AND CHARACTERISATION OF VIRUS CAUSING SUNFLOWER MOSAIC DISEASE
    (UNIVERSITY OF AGRICULTURAL SCIENCES, GKVK, BENGALURU, 2019-08-19) SANGEETA SABANNA BHAJANTRI
    Sunflower mosaic disease caused by Sunflower mosaic virus (SuMV) is one of the important viral diseases in sunflower. Sunflower plants inoculated mechanically with SuMV, exhibited mosaic symptoms followed by mottling, puckering, chlorotic rings, reduction in leaf lamina and stunted growth. Addition of 0.5 per cent sodium sulphite to phosphate buffer resulted in maximum transmission of virus. The SuMV was transmitted by Aphis gossypii with transmission efficiency of 16.00 to 24.00 per cent. The optimum pre-acquisition starvation period, acquisition feeding period and inoculation feeding periods required for successful transmission of SuMV was 60, 15 and 15 minutes respectively that resulted in 24.00 per cent transmission. In host range studies Nicotiana tabacum, Phaseolus vulgaris, Chenapodium amaranticolor and Gomphrena globosa exhibited chlorotic lesions and Cucumis sativus produced mosaic symptoms whereas, Datura stramonium and Solanum nigrum exhibited both mosaic and mottling symptoms. SuMV infected samples strongly reacted with potyvirus specific antisera in DAS ELISA. The virus was detected by RT-PCR using coat protein (CP) gene specific primers. The amplified product was ~500 bp in size. SuMV CP gene sequence analysis revealed that SuMV causing mosaic in GKVK, Bengaluru showed 98.95 per cent nucleotide identity with SuMV reported from USA and between 90-95 per cent with Sunflower chlorotic mottle virus (ScMoV) isolates reported from other countries. Out of the 11 genotypes screened under glasshouse condition, KBSH-41, KBSH-53 and AHT-5 were found to be resistant for SuMV. Among the 45 genotypes screened in field condition, only five genotypes exhibited mosaic symptoms.