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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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2000 - 200788
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Subject: Genetics and Plant Breeding × End date: 2007 × Start date: 2000 × Thesis Type: Ph.D ×
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Now showing 1 - 9 of 88
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    ThesisItemOpen Access
    GENETIC ANALYSIS OF HEAT AND DROUGHT TOLERANCE IN TETRAPLOID WHEAT
    (UNIVERSITY OF AGRICULTURAL SCIENCES GKVK BANGALORE, 2001-08-07) RUDRA NAIK, V.; Hanchinal, Dr. R. R.
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    ThesisItemOpen Access
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    GENETIC AND PHYSIO-BIOCHEMICAL ANALYSIS OF POD SHATTERING AND PRODUCTIVITY RELATED TRAITS IN SOYBEAN (Glycine max (L.) Merrill)
    (UNIVERSITY OF AGRICULTURAL SCIENCES GKVK BANGALORE, 2001-08-07) AGRAWAL, AJAY PRAKASH; PATIL, Dr. S. A.
    A collection of 196 germplasm lines was evaluated in three seasons for pod shattering as well as productivity. Observations were made on plant growth, pod characters related to shattering and yield attributes. Plant growth and pod characters showed low to moderate genotypic coefficient of variation except pod weight, seed to pod shell ratio, pod shattering and yield attributing traits. Habitability and genetic advance was high for all the traits except days to maturity, seeds per pod, pod length and pod width. Characters contributing towards pod shattering resistance were pod weight, pod length and pod thickness. Following Mahalanobis 02 analysis, shattering resistant genotypes identified were grouped in five clusters, of which EC-14396, CGP-268 and GP-2340-A were also promising for seed yield. A diallel set of crosses was made using five genotypes representing the variation in pod shattering. Yield attributing traits were under the control of both additive and non-additive gene action. Plant growth and pod characters along with pod shattering were governed by additive gene action except for degree of indeterminate growth habit, seeds per pod, pod width and pod shell Lhiekness. Pod shattering susceptibility was partially dominant over resistance and the data indicated the possibility of developing shattering resistant genotypes by crossing resistant parents. Physiological parameters related to pod development indicated that growth rate and dry matter accumulation in pod and seed were negatively correlated with pod shattering. However, pod shell growth rate was positively correlated with pod shattering. Assay of four cell wall degrading enzymes in shattering and nonshattering zones of resistant and susceptible varieties indicated that cellulase play an important role in pod shattering process. The action of polygalactouranase was opposite to cellulase, but did not exhibit clear involvement. Peroxidase and polyphenol oxidase did not show any trend in either the pod shattering resistant or susceptible genotypes. The study was able to identify Bragg x JS-335 as potential combination worth handling for developing pod shattering resistant as well as high yielding genotypes.
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    ThesisItemOpen Access
    VARIABILITY, GENETIC AND BIOCHEMICAL STUDIES ON RESISTANCETO SHOOT FLY IN Sorghum bicolor(L.) Moench
    (UNIVERSITY OF AGRICULTURAL SCIENCES GKVK BANGALORE, 2001-08-07) KAMATAR, M.Y.; Swamy Rao, Dr. T.
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    GENETICS OF YIELD, ITS COMPONENTS AND SEX EXPRESSION OVER SEASONS IN CASTOR (Ricinus communis L.)
    (UNIVERSITY OF AGRICULTURAL SCIENCES GKVK BANGALORE, 2001-08-06) KENCHANAGOUDAR, PRABHU V.; Patil, Dr. S. A.
    The present investigation was carried out to understand the behaviour of sex expression and the genetics of yield and its related traits in castor. Studies involving sex expression of seven pistillate lines over three rabi and two khahf seasons, confirmed that three lines viz., VP-1 (NR), NES-19 and LRES-17 had interspersed nature of flowering during summer season and expressed stable pistillate behaviour during late kharif seasons which are of 'S' and 'NES' types. In another experiment to study heterosis, combining ability and gene action involving eleven hybrids showed significant heterosis over the check GCH-4 with respect to seed and oil yield. Of these, two were eariy, six were medium, and three were of long duration. High oil heterotic cross VP-1 (NR) x RG-202 was consistent in both the seasons. The magnitude of additive variance was much higher than non-additive variance for days to flower initiation, days to 50 per cent flowering, days 100 per cent maturity on primary raceme, 100 seed weight and capsules on primary raceme. However, other characters viz., nodes to the primary raceme, average intemodal distance, Bartiett's rate of index for yield [BRIC(Y)] and oil content showed both additive and non-additive variances, while yield per plant and other yield components were mainly under the control of non-additive gene action. The pistillate lines NES-6 and NES-17 and the testers viz., 3-135, RG-360, Bhagya, Aruna and 48-1 were good general combiners for earliness. While VP-1 (NR) and NES-17 pistillate lines and RG-374, RG-359, 48-1 and SH-63 testers were good general combiners for oil content, seed yield and its related traits. The estimates of sea effects of seven crosses were significant and they recorded significantly superior seed yield compared to the check GCH-4. Cross NES- 17 X RG-360 exhibited significant positive sea effects for early maturity, NES-17 x VP-1(M) for 100 seed weight and VP-I(NR) x RG-359 for oil content. These could be considered for simultaneous exploitation of hybrid vigour for earliness, seed yield and oil content Among the high yielding potential specific cross-combinations, two hybrids viz., NES-17 x 48-1 and NES-17 x RG-360 were early, five hybrids viz., NES- 17 X RG-374. NES-17 x VP-1(M). NES-19 x RG-374, NES-17 x RG-358, VP-I(NR) x RG-359 and VP-I(NR) x 48-1 wrere of medium duration and three hybrids VP-I(NR) X RG-374. LRES-17 x RG- 374 and VP-I(NR) x VP-1(M) were of long duration. It Is suggested to improve NES-6 and NES-17 for femaleness.
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    ThesisItemOpen Access
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    HLTEROSIS, COMBINING AHILITY, GENE ACTION ADAPTABILITY FCI. FRUIT YIELD AND OTHER CHARACTERS IN CHILLIES {Capsicum annuum L.)
    (UNIVERSITY OF AGRICULTURAL SCIENCES GKVK BANGALORE, 2001-04-09) BASAVARAJAIAH, D.; MANJUNATH, A.
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    ThesisItemOpen Access
    MOLECULAR, BIOCHEMICAL AND MORPHOMETRIC FINGERPRINTING OF SUNFLOWER (Helianthus annuus L.) GENOTYPES
    (UNIVERSITY OF AGRICULTURAL SCIENCES GKVK BANGALORE, 2001-07-04) NANDINI RAMESH, Mrs.; CHIKKADEVAIAH
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    AN ANALYSIS OF MUTATIONAL ORIGIN OF GENETIC DIVERSITY IN GROUNDNUT (Arachis hypogaea L.)
    (UNIVERSITY OF AGRICULTURAL SCIENCES GKVK BANGALORE, 2001-08-07) SHESHAGIRI, R.; Gowda, M.V.C.
    An investigation into the nature and utility of mutational origin of genetic diversity in groundnut {Arachis hypogaea L.) was carried out during 1995-1999. The material consisted of the mutants derived from Dharwad early runner (DER). The mutagenic treatment of DER with gamma-rays and ethyl methane sulphonate (EMS) generated high frequency of mutants representing all four botanical types of groundnut Viz.. Spanish bunch (SB), Valencia (VL), Virginia bunch (VB) and Virginia runner (VR). A detailed analysis of the breeding behaviour of these mutants revealed several unusual features such as, homozygous mutations, multiple character mutations, germinal reversions, segregation distortions, non-random mutations etc. The non-Mendelian turnover mechanisms such as transpositions, retropositions, DNA methylation, gene conversion, unequal crossing overs etc., were invoked as possible causes of mutations. Treatment of DER with 5-Azacytidine, a donethylating agent also induced such sub specific and botanical changes indicating a role for methylation in the botanical differentiation of the crop. The mutagens EMS, gamma rays and 5-Azacytidine might have triggered the non-Mendelian turnover mechanisms. Selected DER mutants representing four botanical types were assessed for morphological, cytological and biochemical variability. The analysis of variance and principal component analysis revealed abundant morphological variability, which was comparable to the natural variation existing in the crop. The karyotypic analysis did not showed any significant variation among the mutants except the number and location of asymmetric chromosomes and secondary constrictions. A very low sterility in parents but high pollen sterility in F| and F2 plants was observed in the crosses between mutants belonging to different botanical groups. However, the meiotic analysis indicated normal chromosome pairing except the appearance of a quadrivalent in both, the parents and hybrids. The glutamate oxaloacetate transaminase (GOT) isozyme analysis showed three banding patterns, which were specific to the botanical groups viz., SB, VL and VB/VR. Three polymorphic bands were identified from the seed protein analysis (SDS-PAGE), which distinguished the mutants belonging to two subspecies. Thus, the mutants representing different botanical types at morphological level might be mere expression syndromes at molecular/physiological level. The mutagenesis of DER has resulted in identification of several useful mutants resistant to foliar diseases. Recurrent mutagenesis of selected resistant mutants with EMS and gamma-rays revealed the mutagen and genotype specificity in their mutagenic response. The recurrent mutagenesis was found to be a potential tool to improve for other characters, retaining resistance in these mutants. The use of resistant mutants along with a resistant geimplasm line in three way crosses was found to be a potential approach to improve resistance and productivity, simultaneously.