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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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1990 - 199862
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Subject: Genetics and Plant Breeding × End date: 1998 × Start date: 1990 × Thesis Type: Ph.D ×
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Now showing 1 - 9 of 62
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    ThesisItemOpen Access
    STUDIES ON GENETIC DIVERGENCE IN TAMARIND (Tamarindus indica L.) ACROSS PROVENANCES OF SOUTHERN KARNATAKA
    (UNIVERSITY OF AGRICULTURAL SCIENCES GKVK, BANGALORE, 1993) GANGA PRASAD, S; KULKARNI, R S
    ABSTRACT NOT AVAILABLE
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    ThesisItemOpen Access
    GENOTYPE ENVIRONMENT INTERACTION IN RICE (Oryza sativa L.) WITH SPECIAL REFERENCE TO COLD TOLERANCE
    (UNIVERSITY OF AGRICULTURAL SCIENCES GKVK, BANGALORE, 1992) SHANTHAKUMAR, G; VEERAPPA, K B
    ABSTRACT NOT AVAILABLE
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    ThesisItemOpen Access
    ANALYSIS OF THREE-WAY AND SINGLE CROSS HYBRIDS FOR STABILITY AND SEED PRODUCTION POTENTIALITY IN SUNFLOWER (Helianthus annuus L.)
    (UNIVERSITY OF AGRICULTURAL SCIENCES, BANGALORE, 1998) B H, HALASWAMY; K, Virupakshappa
    Abstract not available
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    ThesisItemOpen Access
    IN VITRO REGENERATION OF PLANTLETS AND NATURE OF SOMACLONAL VARIATIONS IN FINGER MILLET (Eleusine coracana Gaertn.)
    (University of Agricultural Sciences, Bangalore, 1996) BHAT, B VENKATESH; SEETHARAM, A
    Abstract not available
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    ThesisItemOpen Access
    GENETICS OF FRUIT YIELD, YIELD COMPONENTS AND REACTION TO MAJOR BIOTIC STRESSES IN CHILLI (Capsicum annuum L.)
    (UNIVERSITY OF AGRICULTURAL SCIENCES, DHARWAD, 1997) V HIREMATH, NANDEESH; S J, PATIL
    An investigation on chilli (Capsicum annuum L.) was undertaken at Botany Garden, University of Agricultural Sciences, Dharwad during 1994-96 with two experiments viz., 42 F2s from 7x7 diallel to estimate combining abilities and residual heterosis (Expt. 1) and 75 diverse germplasm from Karnataka, Andhra Pradesh, Tamil Nadu, Uttar Pradesh and Vietnam to work out variability, heritability, genetic advance, correlation and path analysis (Expt. 2) of 12 metric traits including fruit yield and 5 major biotic stresses viz., murda/1eaf curl complex, mosaic disease, fruit rot, powdery mildew and fruit borer. The significant differences due to genotypes for all characters in both the experiments indicated the suitability of material for the present study. The combining ability analysis revealed that Byadgi dabbi, Lokur and Puri red parents were found as good general combiners for most of the traits. The Lokur X Puri red (6x7) cross was identified as the most promising cross to obtain elite progenies for vegetable purpose with high yield and multiple resistance to all major biotic stresses. The superiority of 6x7 cross is attributed to high gca effects of both parents, non-significant sea effects, negligible reciprocal cross differences and high per se performance along with significant residual heterosis of 123.61, 93.85 and 37.26 percent for fruit number, fruit yield/plant and plot yield respectively over Byadgi kaddi as standard check. In addition, Byadgi kaddi x Puri red (3x7), Sankeshwar x Puri red (4x7) and Button x Puri red (5x7) crosses had the potential to provide good base material for future breeding programmes. The germplasm evaluation indicated that majority of fruit traits and yield components recorded high GCV and heriability than plant growth traits. High GCV, heritability coupled with high genetic advance were recorded for number of fruits/plant, fruit yield/plant, fruit related traits like length, volume, surface area. Among biotic stresses, high GCV moderate heritability and genetic advance were recorded for fruit rot followed by murda complex, mosaic disease and fruit borer. The number of fruits/plant average fruit weight and fruit traits (length, diameter, volume and surface area) showed significant correlation among themselves and with fruit yield/plant. But murda complex, mosaic disease and fruit borer exhibited negative association with fruit number and fruit number exerted high direct effects followed by average fruit weight. Therefore, the future chilli breeding programmes should include fruit length, number of fruits/plant and average fruit weight in formulating the selection criteria as they recorded high GCV, heritability, genetic advance alongwith significant positive correlation and high direct effects on fruit yield/plant.
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    ThesisItemOpen Access
    HISTOLOGICAL BASIS OF GENETIC MALE STERILITY AND ITS UTILIZATION IN HYBRID DEVELOPMENT IN DIPLOID COTTONS
    (UNIVERSITY OF AGRICULTURAL SCIENCES, DHARWAD, 1997) S T, KAJJIDONI; S J, PATIL
    An investigation was carried out to study the histological basis of male sterility in two genetic male sterile lines of G. arboreuML. (DS-5 and GAKA-423) and their use in exploitation of heterosis at iNtra and interspecific(g. arboreum L.xG. herbaceum L.) levels in desi cotton. A detailed comparative study on histological features of anther development in two GMS and their fertile counter part lines revealed that, the process of microsporogenesis was normal with regular meiosis until the formation of microspores. Abnormality was noticed during further development of microspores at the time of pollen grain formation in both the GMS lines. The heterozygous condition of GMS based hybrids of G. arboreum L. had enhancing effect on seed cotton yield and reducing effect on ginning out turn per cent compared to conventional hybrids. Similarly among the interspecific crosses, the heterozygous condition of male sterility character had enhancing effect on anther number, leaf length and reducing effect on ginning outturn per cent. Among crosses of G. arboreum L. the GMS hybrids exhibited better average heterosis than conventional hybrids. Four GMS based hybrids viz, DS- 5x30802, DS-5xB-Desh, DS-5xNo.2708 and DS-5xNo.2631 were the most promising hybrids in respect of seed cotton yield. Among interspecific crosses, there was no significant difference for seed cotton yield between GMS based and conventional hybrids. Interspecific hybrids exhibited high average heterosis (33.68 and 34.08%) for seed cotton yield and number of bolls per plant (29.95 and 34.08%) than intraspecific hybrids involving G. arboreum L. in GMS and conventional cross combinations. Three interspecific crosses viz, DS-5xSM-88, DS-5xKumpta and DS-5xJayadhar exhibited consistently significant better parent heterosis in both GMS based and conventional cross combinations. The combining ability analysis of G. arboreum L. and interspecific crosses revealed predominance of SCA variance for all the thirteen characters under study in both GMS and conventional combinations. Importance of both the GCA and SCA variances was observed for seed cotton yield, number of bolls per plant, ginning outturn, lint index and halo length in GMS based crosses of G. arboreum L. The same trend was alsp observed in conventional crosses of G. arboreum L. except for lint index and halo length traits. Predominance of both GCA and SCA variances was observed for plant height, number of monopodial branches, yield of seed cotton per plant, boll weight and number of seeds per boll in interspecific GMS based crosses. A similar trend was also observed for days to 50 per cent flowering, seed cotton yield per plant, number of bolls per plant and lint index in conventional crosses.
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    ThesisItemOpen Access
    STUDIES ON POLLEN COMPETITION IN PARENTS, F,'S DERIVED FROM POLLEN MIXTURES AND HYBRID BLENDS FOR SEED CHARACTERS AND YIELD IN SUNFLOWER [Helianthus annuus.]
    (UNIVERSITY OF AGRICULTURAL SCIENCES, DHARWAD, 1997) I, SHANKER GOUD; K, GIRIRAJ
    The study was carried out in sunflower with three male sterile lines (CMS), three respective maintainer lines and ten restorer lines at Regional Research Station, Rai- chur, during the period from 1994 to 1996, to derive information on effect of pollen and its competitive influence at gametophytic and sporophytic phases; and the practical utility of hybrids derived from pollen mixtures and hybrid blends. In the study of thirty F0and F,hybrids, the pollen parents R X 13, R 857, R 6D-1, RLC 2Br and RHA 274 were in general, had positive influence on most of the seed characters in F0 generation. The ratio of gca: sea variances showed that all the seed charac­ters in F0generation are governed by non-additive gene action. The ovule parent CMS DSF 15 was good general combiner for all the characters except volume weight. Among pollen parents R X 13 was the best general combiner for oil content and hull percent, while R 6D- 1, R 857, RLC 2Br and RIV 83 had highest general combining ability for 1000 seed weight, seed density, volume weight and K/H ratio respectively. The specific combining ability studies showed that the CMS 4546 x R 6D-1 was best for 1000 seed weight, CMS 234 x R IV 83 for oil content, CMS DSF 15 x R X 13 for seed density, CMS DSF 15 x R 6D-1 for volume weight, CMS DSF 15 x RLC 2Br for K/H ratio and CMS 234 x RHA 274 for hull percent. Histological studies on seventh day after pollination showed increase in cell size in f0 of crosses compared to their respective maintainer lines, although the number of cells were same. On 21st day after pollination, the crosses had longer and broader cotyledons compared to their maintainer lines. The hull content of F0 seed (Metaxenia) in the ovule parent CMS 234 was significantly influenced by the pollen parents R 8297, R 857, RLC 2Br, R 6D-1, R V 34 and R VI 78, while the other two ovule parents were influenced by RHA 274. All the seed characters in F0 and F. generation showed positive and significant correlation. In the study of pollen competition, three parents R X 13, R IV 83 and R 857 were highly competitive with high pollen germination and quick tube growth at gameto­phytic level and also showed high fertility in hybrids. In the study of pollen mixed hybrids, they were found better for all the seed characters, when compared with component hybrids. Two pollen mixture hybrids were found to be better than three or four pollen mixture hybrids and the hybrid 'AB' (CMS DSF 15 x R 857 + R X 13) was the best with 20 per cent superiorty over expected yield. The study of hybrid blends revealed superiority of blends over the compo­nent hybrids for most of the seed characters. Two component hybrid mixtures were good and among them 'ah' (CMS DSF 15 x R 857 + CMS DSF 15 x R X 13) was the best, yielding 32 per cent more than the expected. Although pollen mixture hybrids gave slightly less yield compared to respective hybrid blends, their plus point is that they can be pro­duced easily with less cost.
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    ThesisItemOpen Access
    INDUCED MUTAGENESIS FOR ENHANCED YIELD AND NITROGEN FIXING ABILITY IN COWPEA [Vigna unguiculata (L.) Walp.]
    (UNIVERSITY OF AGRICULTURAL SCIENCES GKVK BANGALORE, 1998-12-07) MAHADEVU, P.; KULKARNI, R.S.
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    ThesisItemOpen Access
    GENETIC MANIPULATION FOR DETERMINATE GROWTH HABIT IN RICE BEAN (Vigna umbellata (Thunb.) Ohwi and Ohashi) THROUGH INDUCED MUTAGENESIS AND HYBRIDIZATION
    (UNIVERSITY OF AGRICULTURAL SCIENCES, BANGALORE, 1990) LOKESHA, R; SHIVASHANKAR, G
    Abstract not available