http://www.erepo.iihr.ernet.in/handle/123456789/294 2013-05-18T15:06:47Z 2013-05-18T15:06:47Z Das, Sukhen Chandra http://www.erepo.iihr.ernet.in/handle/123456789/335 2012-11-20T20:30:08Z 2001-01-01T00:00:00Z

Title: Variability and hybrid evaluation studies in papaya (Carica papaya L.) Authors: Das, Sukhen Chandra Abstract: In an experiment conducted at Indian Institute of Horticultural Research, Bangalore, halfsib analysis was carried out in papaya (Carica papaya L.) using twelve varieties and hybrids namely Coorg Honey Dew, Pink Flesh Sweet, Sunrise Solo, Waimanalo, Pant-2, Washington, Red Gold, Pusa Dwarf; PAU Selection, CO-4, H-39 and H-57. The objective of the study was to derive information on genetic advance and genetic advance over per cent mean, physic-chemical characteristics, which could be used in breeding programme and performance of new hybrids in comparison with their parents. In addition to the above, a study was conducted to see the seed setting pattern and to study the suitable flower type for seed production two varieties of Carica papaya, Sunrise Solo (Gynodioecious) and Washington (Dioecious). All the plant and fruit characters studied showed higher phenotypic variance than the genotypic variance which indicated the importance of environment in the manifestation of these characters. The heritability estimates were high for the characters fruit length, pulp thickness, plant height, total carotenoids, ascorbic acid, fruit breadth and TSS, indicating that these characters are amenable for improvement through selection. Fruit length, fruit volume fruit cavity index, fruit weight, total carotenoids and ascorbic acid had high heritability and genetic advance indicating additive gene action, which showed that selection cam be made easily based on parental performance. For most of the characters, the genotypic correlation values were more than the phenotypic correlation values indicating of influence of environment. With regard to the seed setting pattern, the study showed that the variety Sunrise Solo comparatively matures earlier than Washington, early germination of seed was also seen in this variety. The percentage of fruit set and germination percentage in seeds was more in case of the variety Sunrise Solo than in the variety Washington.

2001-01-01T00:00:00Z B, Boraiah http://www.erepo.iihr.ernet.in/handle/123456789/334 2012-11-20T20:30:07Z 2001-01-01T00:00:00Z

Title: Response of grapes to micro-irrigation under different evaporation replenishment rates Authors: B, Boraiah Abstract: The field experiment was conducted at the Indian Institute of Horticultural Research, Hessaraghatta, Bangalore during 1999-2000 to study the “Response of grapes to microirrigation under different evaporation replenishment rates”. The fruit yield of grape was higher with drip irrigation (30.20 t ha-1) compared to microjet irrigation (29.94 t ha-1). The yield attributing parameters like number of branches per plant (90.75), average bunch weight (473.33 g), 100 berry weight (380.99 g), berry diameter (22.23 cm2) and berry length (31.30 cm2) were higher with drip irrigation. Increasing the evaporation replenishment increased the fruit yield and other yield parameters like, the fruit yield was higher with 100 per cent evaporation replenishment (31.98 t ha-1) which was on par with 75 per cent evaporation replenishment (31.53 t ha-1), but it was lower with 50 per cent evaporation replenishment (26.69 t ha-1). Evaporation replenishment rates did not influence the growth parameters like leaf area of index leaf, fresh weight of index leaf, dry weight of index leaf, dry matter content of index leaf and pruning weight although they were higher with 100 per cent evaporation replenishment. The total soluble solids was marginally higher with drip irrigation (15.43%) compared to microjet irrigation (15.37%), but the titrable acidity did not vary with the method of irrigation (0.34%). The sugar : acid was higher with drip irrigation (45.11) compared to microject irrigation (44.86). Irrigation scheduled with an evaporation replenishment rate of 75 per cent either with microject or drip irrigation resulted in higher yields. The water use with 75 per cent evaporation replenishment was 945.75 mm.

2001-01-01T00:00:00Z H K, Narendra Babu, http://www.erepo.iihr.ernet.in/handle/123456789/333 2012-11-20T20:30:08Z 1999-01-01T00:00:00Z

Title: Studies on the response of grape genotypes in relation to different levels of moisture stress Authors: H K, Narendra Babu, Abstract: A pot trial experiment was conducted on six grape genotypes (Dogridge, Saltcreek, 1613, St. George, Vitis champini clone and cultivar Thompson Seedless) with three levels of moisture stress for a period of 14 days. Of the six grape genotypes studied, the rootstocks, 1613, St. Geroge, Vitis champini clone along with cultivar Thompson Seedless did not survive the stress under 100 per cent moisture stress condition. However, all of them survived under 50 per cent stress condition. Under 100 per cent stress, all the genotypes showed general reduction in Relative Water Content (RWC), Osmotic Potential (OP), Leaf Water Potential (LWP), Transpiration rate (AE), Net Photosynthetic Rate (Pn) and Stomatal Conductance (Gs). Under 50 per cent mositure stress RWC, AE, Pn, Gs, reduced in all the genotypes. Whereas, they wre on par with the OP and LWP. Leaf temperature (LT) increased in all the genotypes at both the stress levels. The N, P and K content reduced in all the genotypes as a result of moisture stress. However, in Dogridge the N content in the leaves of stressed plants was almost on par with the well watered plants. Another experiment conducted on the diurnal variation of leaf RWC, OP and LWP were maximum in the morning in all the three genotypes (Dogridge, Saltcreek and Thompson Seedless) studied and reduced considerably by noon and slightly recovered in the afternoon under complete moisture stress. Soil mositure content was reduced in all the genotypes due to mositure stress. In the root development studies with six grape genotypes the highest root dry weight among all the categories of roots was found in Dogridge. Similarly, the dry weight of the shoot as well as the plant height were maximum in the rootstock Dogridge.

1999-01-01T00:00:00Z S S, Chandra Kumar, http://www.erepo.iihr.ernet.in/handle/123456789/332 2012-11-20T20:30:07Z 1998-01-01T00:00:00Z

Title: Growth and productivity of Robusta banana under nitrogen and potassium fertigation Authors: S S, Chandra Kumar, Abstract: A field experiment was conducted at IIHR, Bangalore to study the growth and productivity of banana cv. Robusta under nitrogen and potassium fertigation. The findings are summarized hereunder. The fruit yield of 88.46 t/ha was obtained with 200 g of N and K and was on par with 150 g of N and K (85.66 t/ha). The lower yield of 78.19 t/ha and 56.39 t/ha were obtained with 100 g N and K and 50 g of N and K respectively. The yield attributing parameters like hand per bunch (7.43), fingers per bunch (96.02), average finger weight (207.37 g) and average bunch weight (19.90 kg) were higher with 200 g of N and K. The maximum leaf dry matter (1258 g), pseudostem dry matter (1122 g), fruit dry matter (2010 g) and total dry matter (4390 g) were obtained with 200 g of N and K. The leaf dry matter (1207 g) and pseudostem dry matter (1031 g) were higher with 150 g of N and K which were on par with 200 g of N and K. However, leaf dry matter, pseudostem dry matter and total dry matter were not influenced much by N and K ratios. But 1:2 N and K ratio recorded maximum leaf dry matter (1116 g), pseudostem dry matter (974 g), fruit dry matter (1780 g) and total dry matter (3859 g). The bunch dry matter (r=0.995**), total dry matter (r=0.937**), stem dry matter (r=0.833**) and leaf dry matter (r=0.722**) were highly correlated with fruit yield. The quality parameters such as total soluble solids (TSS) and pulp to peel ratio were improved by N and K fertigation. Higher total soluble solids (24.01%) was recorded with 200 g of N and K which was on par with 150 g of N and K (24%). Whereas 23.25% and 22.50% TSS were recorded with 100 g of N and K and 50 g of N and K. application of 1:2 N and K ratio recorded higher TSS (24.4%) in fruit compared to 1:1 N and K ratio (23.68%). Higher net returns (Rs.3,88,568.00 per ha) was recorded with 200 g of N and K, while higher profit per rupee invested (Rs. 2.82) was with 150 g of N and K. Further, 1:2 N and K ratio obtained higher net returns (Rs. 3, 43,551.00 per ha) and profit per rupee invested (Rs. 2.59). 28

1998-01-01T00:00:00Z