Loading...
Thesis
Browse
37 results
Search Results
ThesisItem Open Access WATER USE EFFICIENCY IN POMEGRANATE (Punica granatum L.) cv. JYOTHI AS INFLUENCED BY DRIP IRRIGATION AND POLYETHYLENE MULCH(University of Agricultural Sciences, Dharwad, 1999) JAGANATH, S; NARAYANA GOWDA, J VABSTRACT NOT AVAILABLEThesisItem Open Access STUDIES ON VEGETATIVE PROPAGATION OF MANGO (Mangifera indica L.)(University of Agricultural Sciences, Dharwad, 1999) HARISH, H L; MELANTA, K RABSTRACT NOT AVAILABLEThesisItem Open Access FERTIGATION STUDIES IN GERBERA (Gerbera jamesonii Hook.) UNDER LOW COST GREENHOUSE(University of Agricultural Sciences, Dharwad, 1999) SUJATHA, K; NARAYANA GOWDA, J VABSTRACT NOT AVAILABLEThesisItem Open Access STUDIES ON VEGETATIVE PROPAGATION OF MANGO (Mangifera indica L.)(University of Agricultural Science, Dharwad, 1998) Harish, H L; Melanta, K RABSTRACT NOT AVAILABLEThesisItem Open Access STUDIES ON MECHANISMS OF RESISTANCE TO RUST AND GENETICS OF QUANTITATIVE CHARACTERS IN SNAP BEAN (Phaseolus vulgaris L.)(University of Agricultural Science, Dharwad, 1999) Aghora, T S; Madalageri, M BEPIDEMIOLOGICAL COMPONENTS OF PARTIAL RESISTANCE TO RUST, NATURE OF PATHOGENESIS, THE PHYSIOLOGICAL, BIOCHEMICAL AND GENETIC BASIS OF RUST RESISTANCE IN SNAP BEAN {PHASEOLUS VULGARIS L.) WERE INVESTIGATED. ASSOCIATION AND INTER-RELATIONSHIP BETWEEN RUST RESISTANCE AND QUANTITATIVE CHARACTERS, THE COMPONENTS OF GENETIC VARIATION AND GENE ACTION FOR VARIOUS QUANTITATIVE CHARACTERS WERE WORKED OUT. AMONG THE 60 GENOTYPES EVALUATED FOR RUST RESISTANCE UNDER ARTIFICIAL EPIPHYTOTIC CONDITION, 37 GENOTYPES WERE RESISTANT, FIVE LINES VIZ., LLHR-12, 13, 45, 121 AND 161 WERE SLOW RUSTLERS AND 18 WERE SUSCEPTIBLE. SLOW RUSTLERS SHOWED LESS AUDPC, LOW PDI, EXTENDED LATENT PERIOD, FEWER PUSTULES, SMALL PUSTULE SIZE, AND LOW SPORULATION CAPACITY. THE NEGATIVE ASSOCIATION OF AUDPC AND PDI WITH LATENT PERIOD AND POSITIVE AND SIGNIFICANT CORRELATION WITH ALL OTHER COMPONENTS OF PARTIAL RESISTANCE WAS OBSERVED. HISTOPATHOLOGICAL STUDIES REVEALED THAT THE ENTRY OF THE PATHOGEN INTO THE HOST TISSUE WAS THROUGH STOMATA. THE STRUCTURAL FEATURES OF THE STOMATA LIKE SMALL STOMATAL PORE SIZE, NARROW STOMA, AND FEWER STOMATA IMPARTED THE RESISTANCE TO RUST. AMONG THE BIOCHEMICAL COMPONENTS OF RESISTANCE, HIGH CHLOROPHYLL, HIGH PHENOL, AND LOW SUGAR WERE ASSOCIATED WITH RESISTANCE. A PAIR OF DOMINANT GENES CONTROLLED THE RUST RESISTANCE IN IIHR-220 AND KPV-1. THE CROSSES CONTENDER X KPV-1, ARKA KOMAL X IIHR-220, THEIR RECIPROCAL CROSSES AND ARKA KOMAL X KPV-1 WERE HIGH YIELDING WITH RESISTANCE TO RUST. THE ASSOCIATION OF QUANTITATIVE CHARACTERS WITH DISEASE SEVERITY WAS NEGATIVE AND SIGNIFICANT FOR ALL THE TRAITS EXCEPT DAYS TO FIRST FLOWERING AND DAYS TO POD MATURITY. THE MAGNITUDE OF NEGATIVE CORRELATION OF PDI WITH POD YIELD PER PLANT, TOTAL POD NUMBER, TOTAL FLOWERS PER PLANT, SEEDS PER POD AND FLOWERING BRANCHES WERE HIGH. DUPLICATE TYPE OF EPISTASIS FOR PLANT HEIGHT, AND FLOWERING BRANCHES AND COMPLEMENTARY GENE ACTION FOR FLOWERS PER PLANT, PODS PER PLANT AND POD WEIGHT WERE NOTICED. HETEROBELTIOSIS WAS HIGH AND SIGNIFICANT BUT THE GENETIC ADVANCE WAS LOW FOR THE MAJORITY OF THE QUANTITATIVE CHARACTERS INDICATED THE LIMITED POSSIBILITY OF IMPROVING THESE CHARACTERS THROUGH SELECTION. HENCE, IT IS SUGGESTED TO GO FOR BIPARENTAL MATING OF SELECTED PARENTS FOLLOWED BY THE PEDIGREE METHOD OF SELECTION. STUDIES INDICATED THAT THE SELECTION SHOULD BE BASED ON HIGH CHLOROPHYLL, HIGH PHENOL, LOW SUGAR, SMALL AND FEWER STOMATA, LONG LATENT PERIODS, SMALL AND FEWER PUSTULES, LOW PDI, LOW AUDPC AND LOW SPORULATION CAPACITY FOR IMPROVING RUST RESISTANCE.ThesisItem Open Access STUDIES ON GENETICS OF RESISTANCE TO ALTERNARIA LEAF BLIGHT (Alternaria dauci) IN CARROT (Daucus carota L.)(University of Agricultural Science, Dharwad, 1995) Manjunatha, G O; Dutta, O PABSTRACT NOT AVAILABLEThesisItem Open Access MUTATION BREEDING IN ROSE AND PIGMENTATION STUDIES IN ROSE AND HIBISCUS(University of Agricultural Science, Dharwad, 1997) Shobha, K S; Bhat, R NABSTRACT NOT AVAILABLEThesisItem Open Access CLONAL MULTIPLICATION OF BLACK PEPPER (Piper nigrum L.)(University of Agricultural Science, Dharwad, 1999) Hegde, Hemanth G; Hulmani, N C"Studies were conducted to develop a protocol for micropropagation of black pepper {Piper nigrum) through axillary shoot multiplication. Also different plant propagation structures and season of planting for rooting of cuttings were evaluated. The studies were conducted at the Agricultural Research Station (Pepper), Sirsi and laboratories of the College of Forestry Sirsi, University of Agricultural Sciences, Dharwad during 1995-99. Surface disinfection of shoot tip or nodal bud explants with sodium hypochlorite (2%) for ten minutes was found optimum. The explants collected during February to May gave better establishment. The young buds from the tip to the sixth nodal segment gave better establishment of cultures. MS semisolid medium with half the strength of its inorganic salts supplemented with BA 2 mgl-1 and 30 gl-1 sucrose was suitable for shoot establishment as well as shoot multiplication (5.13 buds/culture). The multiplication rate increased with repeated subculturing on media of same composition at 15 days interval. Rooting of in vitro derived shoots was achieved in in vitro as well as ex vitro conditions. Cent per centVooting was obtained under in vitro conditions in medium supplemented with NAA 1 mgl-1 and 30 gl-1 sucrose. Quick dipping the cut ends of shoots in 1000 ppm IBA enhanced ex vitro rooting up to 68 per cent. Pre-hardening treatments enhanced establishment of micropropagated plantlets. A potting mixture containing 1:1 sand + coir pith was superior for establishment of plantlets. The application of 10 ml of Vi MS or Hoogland nutrient solution at weekly intervals was beneficial for vigorous growth of transplanted plantlets. The propagation of black pepper by conventional means through cuttings was best in propagation frame or polyhouse during summer (94%)."ThesisItem Open Access WATER AND NUTRIENT MANAGEMENT STUDIES IN CABBAGE (Brassica oleracea L. var. capitata)(University of Agricultural Science, Dharwad, 1999) Bhagavanthagoudra, K H; Rokhade, A K"Studies on the effect of irrigation schedules and methods of irrigation, levels and sources of sulphur, levels of nitrogen and methods of Azospirillum inocultaion on growth, yield and quality of cabbage cv. Pride of India were conducted at University of Agricultural Sciences, Dharwad in red sandy clay loam soils during the rabi seasons of 1997-98 and 1998-99. Scheduling of irrigation at 1.6 IW/CPE ratio resulted in significantly highest yield of 34.40 t ha-1, which is 28.76 per cent more than that obtained with irrigation at 1.0 IW/CPE ratio (25.94 t ha-1). Furrow method of irrigation has resulted in significant increase in cabbage head yield (31.28 t ha-1) by 9.21 per cent over alternatively alternate furrow method (28.40 t ha-1). Based on the economics of irrigation methods, the quantity of water saved by irrigating through alternatively alternate furrow method was 38 per cent compared to furrow method. By utilizing the water saved, an additional area of 0.61 ha can be irrigated to get an additional yield of 14.44 t by which an extra income of Rs. 57,760 can be realised by following alternatively alternate furrow method in place of furrow method. Application of sulphur in the form of single super phosphate, gypsum and elemental sulphur at two levels viz; 20 and 40 kg 3 ha-1 showed a mean increase in cabbage head yield by 9.99 to 26.60 per cent over control. Based on the economics and other merits of gypsum, application of S at 40 kg ha-1 in the form of gypsum was found to be economical for higher productivity. Inoculation of Azospirillum through soil + seedling dipping recorded significantly highest yield of cabbage (41.61 t ha-1) which is 33.67 per cent more than that obtained in control (31.13 t ha-1). The highest B:C ratio of 4.29 was obtained by application of Azospirillum through soil +seedling dipping along with 100 per cent RDN. Application of Azospirillum through soil +seedling dipping along with 100 per cent RDN produced 31.76 per cent higher yield over only RDN (100%) without Azospirillum."