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    ThesisItemOpen Access
    Varietal Resistance and Efficacy of Novel Insecticides against Sucking Insect Pests of Clusterbean, Cyamopsis tetragonoloba (L.) Taub.
    (2022) Choudhary, Anita; Kumawat, K.C.
    Investigation on „Varietal resistance and efficacy of novel insecticides against sucking insect pests of clusterbean, Cyamopsis tetragonoloba (L.) Taub. were carried out at Agronomy Farm of S.K.N. College of Agriculture, Jobner (Rajasthan) during Kharif, 2021. Out of ten varieties of clusterbean crop screened for their comparative resistance against leafhopper, whitefly and aphid, none of them was found completely free from infestation. The varieties RGC-197 and RGC-986 were categorized as highly resistant; RGC-1055, RGC-12-1, RGC-1017, RGC 1066 and RGC-1038 as moderately resistant and RGC-1002, RGC-1003 and RGC-1033 as least resistant against leafhopper. The varieties RGC-1017 and RGC-986 were categorized as highly resistant; RGC-197, RGR-12-1, RGC 1066, RGC-1055 and RGC-1038 as moderately resistant and RGC-1002, RGC-1003 and RGC-1033 as least resistant against whitefly. The varieties RGC-197 and RGC-1017 were categorized as highly resistant; RGC-1038, RGR-12-1, RGC-1055 and RGC-1033as moderately resistant and RGC-1003 and RGC-1002 and RGC-1066 as least resistant to aphid. The days to flower initation, plant height, pod length and fibre had non significant correlation. The trichome density, pod width, number of pods per plant, seed yield and total phenol had negative significant correlation, whereas the free amino acid, chlorophyll and mositure content had positive significant correlation with leafhopper, whitefly and aphid populations. The bioefficacy of newer insecticides tested against leafhopper, whitefly and aphid on clusterbean revealed that diafenthiuron 50 WP 0.05 per cent (88.14%), chlorfenapyr 0.01 per cent (84.62%) and flubendiamide 39.35 EC 0.01 per cent (82.12%) were found most effective against leafhopper. In case of whitefly, pyriproxyfen 0.005 per cent, diafenthiuron 0.05 per cent and dimethoate 0.03 per cent (90.56 – 93.65% reduction) were found most effective. In case of aphid, the most effective treatments were diafenthiuron 50 WP 0.05 per cent (95.62% reduction), buprofezin 25 SC 0.04 per cent (93.62%) and dimethoate 30 EC 0.03 per cent (91.82% reduction). The buprofezin 0.04 per cent and pyridalyl 0.015 per cent (5.66 – 5.67 Coccinella septempunctata/ 10 plants) were observed to inflict least adverse effect on ladybird beetle, vis-à-vis in dimethoate 0.03 per cent, bifenthrin 0.016 per cent, pyriproxyfen 0.005 per cent and pymetrozine 0.025 per cent were observed highly toxic (2.31-3.01 C. septempunctata/ 10 plants)proved highly toxic group. In case of C. zastrowi,arabica pyridayl 10 EC 0.015, pymetrozine 50 WG 0.025 per cent and chlorantraniliprole 18.5 SC 0.01 per cent (3.0 – 3.19 /10 plants) were observed to inflict least adverse effect, vis-à vis in dimethoate 30 EC 0.03 per cent, followed by diafenthiuron 50 WP 0.05 per cent, pyriproxyfen 10.8 EC 0.005 per and pymetrozine 50 WG 0.025 per cent (1.92 - 2.45/10 plants) proved highly toxic group. Maximum yield of 10.31 q/ hectare was registered in the plots treated with dimethoate 30 EC which was at par with diafenthiuron 50 WP (10.20 q/ha) and pyriproxyfen 10.8 EC (10.07 q/ha). These treatments were followed by chlorfenapyr 39.35 EC and chlorantraniliprole 18.5 SC which revealed seed yield of 9.80 and 9.25 q/ ha. The minimum seed yield was recorded in pyridalyl 10 EC and pymetrozine 50 WPviz., 8.33 and 8.49 q/ha., respectively. The other treatments revealed seed yield which ranked in the middle order. The maximum increase in yield over untreated check was record in dimethoate 30 EC (0.03%) treated plots (5.31q ha-1 ). The maximum net return was recorded in the treatment of dimethoate 30 EC 0.03 per cent (` 24,150.00 ha-1 ) followed pyriproxyfen 0.005 per cent (` 23,072.00 ha-1 ) and diafenthiuron 50 WP 0.05 per cent (` 22,460.00 ha-1 ). The maximum benefit cost ratio was recorded in the treatment of pyriproxyfen 10.8 EC 0.005 per cent(10.13) followed by dimethoate 30 EC 0.03 per cent (10.06) and diafenthiuron 50 WP 0.05 per cent (6.34).
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    ThesisItemOpen Access
    Survey and Management of Root-knot Nematode Meloidogyne javanica) in Field Pea (Pisum sativum Var. arvens L.)
    (2022) Rajveer; Gurjar, Hemraj
    Present study was carried out in Rabi season 2021-22 in Division of Nematology at Rajasthan Agricultural Research Institute, Durgapura, Jaipur on survey and management of root-knot nematode (Meloidogyne javanica) in field pea (Pisum sativum Var. arvens L.). The distribution and occurrence of root-knot nematode in Zone IIIA of Rajasthan and the response of resistant promising cultivars against root-knot nematode, loss estimation caused by root-knot nematode and management of root-knot nematode, Meloidogyne javanica through newer nematicide in field pea. A survey was carried out during the months of January to February, 2022. During survey total 482 soil and root samples were collected from from 27 localities of Zone IIIA of Rajasthan included Jaipur, Ajmer, Dausa and Tonk districts. Out of 482 Meloidogyne spp. was found maximum in 453 samples with 93.98% absolute frequency, 22.31% absolute density and 2.16% prominence value. Out of 27 localities the 100 % incidence of root knot nematode was recorded in 16 locilities i.e., Sanjhariya, Fathehpura, Bobas, Begus, Baseri, Keshyawala, Dhankya, Nimeda, Mukundpura, Lalsot, Chak Toonga, Madhogarh, Beechha, Kanota, Harsuliya and Bassi.The other plant parasitic nematodes like Helicotylenchus spp., Pratylenchus spp., Hoplolaimus spp. and free-living Saprophytes also look into collected soil and root samples. In other pathological disease the maximum disease incidence of root-rot (Fusarium oxysporum f. sp. Pisi) disease of field pea was recorded in Diggi (ARSS) Institute (30.00%) of Tonk district and maximum disease incidence of wilt (Rhizoctonia solani) disease of field pea was recorded in Bassi village (25.00%) of jaipur district. In the varietal screening of forty two cultivars i.e., Adarsh, Aman, Ambika, HFP 1426, HFP 1428, HFP 529, HFP 715, HFP 9426, HFP 9907B, HFP-4, HUDP 15, IPF 16-13, IPF 20-17, IPF 20-21, IPFD 10-12, IPFD 1-10 (Prakash), IPFD 11-5, IPFD 12-2, IPFD 14-2, IPFD 19-1, IPFD 19-3, IPFD 20-2, IPFD 20-3, IPFD 20-8, IPFD 20-9, Pant P 243, Pant P 250, Pant P 42, Pant P 455, Pant P 462, Pant P 479, Pant P 480, Pant P 484, Pant P 497, Pant P 498, Pant P 501, Pant P 74, RFP 2010-4, RFPG 181, SKNP 04-09, TRCP 8 and TRCP 9 screened to detect the source of resistance against root-knot nematode, Meloidogyne javanica. Out of 42 sixteen cultivars sixteen i.e., Adarsh, Aman, HFP 1426, HFP 1428, HFP 715, HFP 9426, HUDP 15, IPF 16-13, IPFD 10-12, IPFD 11-5, IPFD 12-2, IPFD 19-1, Pant P 480, Pant P 484, Pant P 497 and Pant P 498 were found highly susceptible. Remaining twenty six cultivars i.e., Ambika, HFP 529, HFP 9907B, HFP-4, IPF 20-17, IPF 20-21, IPFD 1-10 (Prakash), IPFD 14-2, IPFD 19-3, IPFD 20-2, IPFD 20-3, IPFD 20-8, IPFD 20-9, Pant P 243, Pant P 250, Pant P 42, Pant P 455, Pant P 462, Pant P 479, Pant P 501, Pant P 74, RFP 2010-4, RFPG 181, SKNP 04-09, TRCP 8 and TRCP 9 were showed susceptible reaction against root-knot nematode, Meloidogyne javanica. No anyone was found highly resistant, resistant and moderately resistant against root-knot nematode, Meloidogyne javanica
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    ThesisItemOpen Access
    Effect of Plant Growth Regulator and Growing Media on Growth of Root and Shoot in Dragon fruit [Hylocereus undatus L.]
    (2022) Dengri, Dollshree; L.N. Bairwa
    An experiment entitled “Effect of Plant Growth Regulator and Growing Media on Growth of Root and Shoot in Dragon fruit [Hylocereus undatus L.]” conducted during August – November 2021 in shade net house of Horticulture farm, S.K.N. College of Agriculture, Jobner- Jaipur (Rajasthan). The experiment was laid out in Factorial CRD and replicated three times with 16 treatment combinations including four plant growth regulator (IBA) concentrations (control, 2000, 4000 and 6000 ppm) and four growing media (control, sand : cocopeat, sand : vermicompost and sand : vermicompost : cocopeat). The result revealed that the dragon fruit cuttings treated with IBA at 6000 ppm performed superior in all the parameters viz., least number of days taken for root initiation (15.06 days), maximum percentage of rooted cuttings (85.88%), length of longest root (20.60 cm), average length of roots per cutting (13.52 cm), average number of roots per cutting (22.15), diameter of root (1.38 mm), least days taken for sprouting (25.03 days), percentage sprouting (59.98%), sprouts per cutting (2.35), shoot length per cutting (14.80 cm) and diameter of shoot (36.99 mm) at 75 days of planting, where IBA at 4000 ppm was reported at par with 6000 ppm of IBA. Similarly, sand : vermicompost: cocopeat (1 : 1: 1) growing media showed significantly higher results for all parameters viz., least number of days taken for root initiation (15.04 days), maximum percentage of rooted cuttings (85.81%), length of longest root (20.05 cm), average length of roots per cutting (13.28 cm), average number of roots per cutting (22.16), diameter of root (1.35 mm), least days taken for sprouting (25.01 days), percentage sprouting (59.53%), sprouts per cutting (2.35), shoot length per cutting (14.80 cm), diameter of shoot (36.47 mm) at 75 days of planting. Dragon fruit stem cuttings treated with 6000 ppm of IBA and grown in sand: vermicompost: cocopeat (1 : 1 : 1) media proved significantly superior combined treatment in maximum average root (17.14 cm) and shoot (18.64 cm) length. The maximum net return (₹ 854.94 per bed) and B:C ratio (2.21) was recorded under treatment combination G2M2 (IBA at 4000 ppm + sand : vermicompost) which was found to be significantly superior over the rest of the treatment combinations.
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    ThesisItemOpen Access
    Effect of Hydrogel and Foliar Spray of Agro-chemicals on Productivity of Indian Mustard [Brassica juncea (L.) Czern & Coss]
    (2022) Choudhary,Jitendra; Priyanka Kumawat
    A field experiment was conducted during rabi season, 2021-22 at the Agronomy farm, S.K.N. College of Agriculture, Jobner, to study the “Effect of Hydrogel and Foliar Spray of Agro-chemicals on Productivity of Indian Mustard [Brassica juncea (L.) Czern & Coss]”. The experiment was laid out in factorial randomized block design with three replications, assigning sixteen treatment combinations consisting of four hydrogel levels (control, 2.5, 5.0 and 7.5 kg/ha) and four treatments of foliar spray of agro-chemicals (water spray, thiourea 500 ppm, salicylic acid 100 ppm and NPK (19:19:19) 0.5 %) were applied to the Indian mustard var. Giriraj (DRMRIJ-31). The experimental results showed that application of hydrogel at 5.0 kg/ha, being at par with application of hydrogel at 7.5 kg/ha, recorded significantly higher plant height, dry matter accumulation, chlorophyll content, number of primary and secondary branches, CGR, number of siliqua/plant, number of seeds/siliqua, seed yield (1797 kg/ha), stover yield (3863 kg/ha), biological yield (5660 kg/ha), net returns ( 93379/ha) and B:C ratio (3.82) of Indian mustard as compared to hydrogel at 2.5 kg/ha and control. Further, the same trend was also observed for nitrogen, phosphorus and potassium content in seed and stover and their uptake by seed, stover and total uptake, protein content in seed, oil yield, water use efficiency and soil moisture content in soil. While, the plant stand, RGR, number of primary and secondary branches at 40 DAS, test weight and harvest index of Indian mustard was not improved significantly due to different levels of hydrogel. Results further showed that foliar spray of thiourea (500 ppm) being at par with salicylic acid (100 ppm) recorded significantly higher dry matter accumulation, number of primary and secondary branches, CGR, number of siliqua/plant, number of seeds/siliqua, seed yield (1820 kg/ha), stover yield (3897 kg/ha), biological yield (5717 kg/ha), nitrogen, phosphorus and potassium uptake by seed, stover, oil content, oil yield, along with higher water use efficiency, net returns ( 95733/ha) and B:C ratio (3.95) of Indian mustard. However, maximum plant height chlorophyll content, nitrogen, phosphorus and potassium content in seeds were recorded under foliar spray of NPK (19:19:19) 0.5% which was statistically at par with thiourea (500 ppm).
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    ThesisItemOpen Access
    Effect of Different Levels of Ashwagandha (Withania somnifera) Root Powder on Performance of Kuroiler Chicks
    (2022) JOGI, JAGPAL; Mahesh Datt
    The present study was conducted to observe the effect of different levels of Ashwagandha (Withania somnifera) root powder on the performance of Kuroiler chicks. One hundred twenty unsexed Kuroiler chicks (day old) were used on a completely randomized design in 4 treatments with 3 replicates, each consisting of 10 chicks. The treatments included the control group (T1) fed with chick starter feed and other groups were kept on basal diet mixed with Ashwagandha root powder @ 0.5%, 1.0% and 1.5% in T2, T3 and T4, respectively. All other management practices were followed as per recommendation during the experimental period of 56 days. The feed intake and body weight of chicks was recorded at weekly intervals for further analysis. The average body weight, body weight gain, feed intake, feed conversion ratio, performance index, protein efficiency and energy efficiency ratio were significantly higher in T3 group (ARP @ 1.0%) than all other treatments. The feeding of Ashwagandha as a feed additive has not shown any significant effect on mortality rate of Kuroiler chicks. The mortality during the experimental period of 56 days was 5.83%. The highest Benefit cost ratio (1.81) was observed in T3 group followed by T2 (1.78), T1 (1.71) and T4 (1.58). Thus, it can be concluded that, the supplementation of Ashwagandha at 1.0% level was found beneficial in improving body weight, weight gain, feed conversion, protein efficiency and energy efficiency ratio. It can also be concluded that Ashwagandha can be used as efficient, effective and economical alternative to chemical growth promoters in poultry industry. * A post graduate agriculture student, Department of Livestock Producti
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    ThesisItemOpen Access
    Knowledge and Adoption of Recommended Okra Cultivation Practices by the Farmers in Jaipur District of Rajasthan
    (2022) JALTHARIA,RAJKUMAR; I.M. Khan
    Okra is cultivated mainly in Jaipur, Sirohi, Bundi, Alwar, Chittorgarh and Hanumangarh districts of Rajasthan. In Rajasthan, Jaipur district ranked first in area of okra cultivation. The climatic conditions of the Jaipur district are most suitable for cultivation of okra and till today no systematic efforts have been made by researchers in the field of study on knowledge and adoption of recommended okra cultivation practices by the farmers in proposed area. Keeping this view in mind, the present investigation entitled “Knowledge and Adoption of Recommended Okra Cultivation Practices by the Farmers in Jaipur District of Rajasthan” was undertaken in the study area with the following specific objectives: 1. To measure the knowledge of farmers about recommended cultivation practices of okra. 2. To find out the extent of adoption of recommended cultivation practices of okra by the farmers. 3. To study the relationship of independent variables of farmers with their knowledge and extent of adoption of recommended cultivation practices of okra. 4. To identify the constraints perceived by the farmers in adoption of recommended cultivation practices of okra.The present study was conducted purposely in selected Jaipur district of Rajasthan. Out of total 21 tehsils in Jaipur district of Rajasthan, two tehsils namely Jamwaramgarh and Kotputli have been selected purposely on the basis of maximum area of okra. Five gram panchayats from each selected tehsil having maximum area under okra cultivation i.e. a total of 10 gram panchayats were selected purposely. Two villages from each selected gram panchayats were selected on the basis of maximum area under okra cultivation. Thus, a total of 20 villages were selected for the present investigation. From each villages, 6 okra growers growing okra in at least 0.1 ha area were selected on the basis of simple random sampling technique. Thus, total 120 farmers were selected for present study. The data were collected by personal interview method by using a schedule specially developed for the study after getting expert‟s opinion. The data so collected were classified, tabulated and statistically analysed, which led to the following findings 1. Majority of respondents i.e. 74.17 per cent fell in medium knowledge level group whereas 13.33 per cent okra growers were observed in the high knowledge level group and remaining 12.50 per cent respondents possessed low level of knowledge about recommended cultivation practices of okra. The findings of the study also indicated that majority of okra growers had adequate knowledge regarding “Time of sowing” followed by “Soil and field preparation”, “Harvesting”, “Seed rate and recommended spacing”, whereas they had medium knowledge regarding “Use of high yielding varieties”, “Seed treatment”, “Weed management”, “Fertilizer application”, “Irrigation management” and “Plant protection measures”. 2. Majority of respondents i.e. 70.83 per cent were in medium level of adoption group, whereas 15.83 per cent respondents were in high adoption group and remaining 13.34 per cent okra growers were observed in the category of low level of adoption. The findings of the study also indicated that farmers had adequate adoption regarding “Time of sowing” followed by “Soil and field preparation”, “Harvesting”, “Seed rate and recommended spacing”, whereas they had medium adoption regarding “Use of high yielding varieties”, “Seed treatment”, “Weed management”, “Fertilizer application”, “Irrigation management” and “Plant protection measures”. 3. The education, annual income, extension contact, social participation, farming experience and cropping pattern of okra growers had positive and significant relationship with their knowledge about okra cultivation practices. Whereas their age and land holding were found to be positively and non-significantly related with their knowledge level of okra cultivation practices. It was also found that their education, annual income, extension contact, social participation, farming experience and cropping pattern were found to have positive and significant relationship with their extent of adoption of okra cultivation practices, whereas their age and land holding were found to have a positive and non-significant relationship with their extent of adoption of okra cultivation practices. 4. Majority of respondents i.e. 70.00 per cent fell in medium constraint perceptors group, whereas 16.67 per cent in high and remaining 13.33 per cent respondents were observed in the group of low constraint perceptors. The study also indicated that in input constraints, “Unavailability of recommended chemical for plant protection measures” and “High cost of insecticides and pesticides” in technical constraints, “Lack of knowledge about plant protection” and “Poor knowledge about doses of chemical fertilizers” in financial constraints, “High cost of inputs” and “High cost of seeds of high yielding varieties” and in marketing constraints, “Lack of storage facilities” and “High cost of transportation” were perceived as the most severe constraints by the okra growers
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    ThesisItemOpen Access
    Effect of Organic Manures and Mulching on Growth, Yield and Quality of Radish (Raphanus sativus L.)
    (2022) Rathore, Pooja; S.P. Singh
    A field experiment entitled „„Effect of Organic Manures and Mulching on Growth, Yield and Quality of Radish (Raphanus sativus L.)” was conducted during Rabi season 2021-22 at Horticulture Farm, S.K.N. College of Agriculture, Jobner, Jaipur (Rajasthan). The experiment comprised of sixteen treatment combinations including four treatments of organic manures (Control, FYM @ 9 t/ha, vermicompost @ 3 t/ha and poultry manure @ 3.6 t/ha) and four treatments of mulching (Control, saw dust @ 10 t/ha, plastic mulch and wheat straw @ 5 t/ha) were taken in Factorial Randomized Block Design with three replications. The results of the study clearly indicated that application of O2 (Vermicompost @ 3 t/ha) significantly increased the plant height (17.28 and 31.19 cm), number of leaves per plant (6.41 and 12.46) at 30 and 45 DAS respectively, leaf area (272.00 cm2 ), chlorophyll content (1.76 mg/g) in leaves, root diameter (6.13 cm), length of root (25.03 cm), shoot weight (48.00 g), root weight (128.48 g), shoot : root ratio (2.63), root yield (9.52 kg/plot and 264.54 q/ha), ascorbic acid content (12.95 mg/100g), net returns (Rs 282606/ha) and B:C ratio supervision of Dr. S.P. Singh, Assoc. Professor, Department of Horticulture, S.K.N. College of Agriculture, Jobner. (2.47) except treatment O3 (Poultry manure @ 3.6 t/ha), which was statistically at par with O2 in terms of net returns. Similarly, application of M2 (Plastic mulch) significantly increased the plant height (17.66 and 31.66 cm), number of leaves per plant (6.42 and 12.43) at 30 and 45 DAS respectively, leaf area (270.44 cm2 ), chlorophyll content (1.78 mg/g) in leaves, root diameter (6.21 cm), length of root (24.89 cm), shoot weight (48.34 g), root weight (128.51 g), shoot : root ratio (2.65), root yield (9.69 kg/plot and 269.31q/ha), ascorbic acid content (12.60 mg/100g). However, application of M3 (Wheat straw @ 5 t/ha) gives higher net returns (Rs 280068/ha) and B:C ratio (2.62) except treatment M2 (Plastic mulch), which was statistically at par with M3 in terms of net returns. Further, the combined application of O2M3 (Vermicompost @ 3 t/ha with Wheat straw @ 5 t/ha) were proved to be significantly superior in terms of net returns (Rs 333640/ha) and B:C ratio (3.06). Thus, on the basis of net returns and B:C ratio combined application of O2M3 (Vermicompost @ 3 t/ha with Wheat straw @ 5 t/ha) is worth recommended to fetch maximum net returns per hectare from radish.
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    ThesisItemOpen Access
    Integrated Nitrogen Management in Garlic (Allium sativum L.)
    (2022) Choudhary, Rajesh; M.R. Choudhary
    Field experiments were conducted under loamy sand soil during rabi seasons of 2020- 21 and 2021-22 at the Horticulture farm, S.K.N. College of Agriculture, Jobner. The experiment comprising six treatments of nitrogen management through organic manure, inorganic fertilizer and biofertilizer (100 % inorganic fertilizer without biofertilizer, 100 % inorganic fertilizer with biofertilizer, 75 % inorganic fertilizer, 25 % organic manure without biofertilizer, 75 % inorganic fertilizer, 25 % organic manure with biofertilizer, 50 % inorganic fertilizer, 50 % organic manure without biofertilizer and 50 % inorganic fertilizer, 50 % organic manure with biofertilizer) were assigned to main plots and four levels of nano urea (0, 25, 50 and 75 ml/ha) in sub plots and replicated thrice in split plot design. Garlic variety ‘G 282’ was used as a test crop. On the basis of two year results, application of 100 % inorganic fertilizer and biofertilizer combined with foliar spray of 75 ml/ha nano urea was proved the most superior treatment combination in garlic representing the significantly higher net returns (` 482860/ha) and bulb yield (194.80 q/ha). However, application of 75 % inorganic fertilizer, 25 % organic manure and biofertilizer combined with foliar spray of 50 ml/ha nano urea was also found equally effective treatment combination and fetched at par bulb yield and net returns. Based on response studies, foliar spray of 66 ml/ha nano urea was found to be the optimum level of N for garlic crop. Further, it may be concluded that application of 75 % RD through inorganic fertilizer, 25 % organic manure and biofertilizer combined with foliar spray of 66 ml/ha nano urea is worth recommendable for farmers of Rajasthan Zone IIIA under loamy sand soil to get significantly better yield (q/ha) net returns (₹) and maximum B:C ratio from garlic crop.
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    ThesisItemOpen Access
    Genetic Studies for Heat Stress Tolerance in Bread Wheat (Triticum aestivum L. em.Thell.) Through Diallel Analysis
    (2022) Madhu, Choudhary; Hoshiyar Singh
    The present investigation was conducted to analyse combining ability, heterosis, heterobeltiosis, inbreeding depression, components of genetic variance and heat stress tolerance for grain yield and its contributing traits in bread wheat (Triticum aestivum L. em. Thell.) in two varying environments created by two dates of sowing viz., normal sown and late sown conditions at Agricultural Research Farm of Rajasthan Agricultural Research Institute (Sri Karan Narendra Agriculture University, Jobner), Durgapura, Jaipur (Rajasthan). The ten genetically diverse parents viz., DPW 621-50, DBW 90, PBW 502, Raj 1482, Raj 4037, UP 2425, Raj 3765, PBW 550, HI 1563 and Raj 4079 crossed in half-diallel fashion (excluding reciprocals) in rabi 2018-19 and for the advance generation F1‟s seed was grown at Wellington (Tamil Nadu), IARI regional sub-station in kharif 2019. The ten parents along with their 45 F1‟s and 45 F2‟s were evaluated in a randomized block design with three replications each in two environments during rabi 2019-20 for grain yield and its contributing traits. The observations were recorded for days to heading, days to maturity, plant height, tillers per plant, flag leaf area, spike length, grains per ear, 1000-grain weight, biomass per plant, grain yield per plant, harvest index, canopy temperature and protein content. The analysis of variance exhibited significant differences among the parents and generations in both the environments for all the studied characters which suggested the presence of sufficient genetic diversity. The G x E interaction revealed significant for all the characters under investigation. Significance of GCA and SCA for all the studied characters in both generations revealed the importance of both additive and non-additive gene action. The ratio of GCA/SCA variance (predictability) indicated the preponderance of non-additive gene action for all the studied characters.Overall estimation revealed that parents viz., Raj 4037, Raj 3765, PBW 502 and Raj 4079 were good general combiner and the crosses DBW 90 x Raj 4037, DPW 621-50 x Raj 4037 and Raj 4037 x Raj 4079 good specific cross combination for grain yield and its contributing traits in both environments. These crosses should be recommended for the handling of segregating generations to obtain the transgressive segregants. Sufficient degree of heterosis and heterobeltiosis were found for all the studied characters. The cross, DPW 621-50 x Raj 4037 in both environments exhibited desirable heterosis and crosses Raj 4037 x Raj 4079 in E1 while, in E2 Raj 4037 x Raj 4079 and Raj 4037 x Raj 3765 showed desirable heterobeltiosis for yield and its all of the contributing traits. The assessment components of genetic variance revealed that both additive (D) and dominance (H1 and H2) components were significant for all the studied characters which showed both components of genetic variance effective in these traits expression. The graphical analysis showed partial to over-dominance for different characters in both environments. The scattering of array points revealed the presence of genetic diversity among the parents for most of the characters. The result of heat susceptibility index (HSI) exhibited that parents viz., UP 2425, PBW 502, Raj 4037 and Raj 4079 were desired for grain yield and some other traits. Among the crosses, DPW 621-50 x Raj 4037 and DBW 90 x Raj 4037 were found more desirable for heat tolerance in most of the studied traits across the generations, should be used as promising breeding material for development for heat stress tolerant wheat cultivars. An overall assessment on the basis of per se performance, SCA effects and heterosis, the crosses viz., Raj 3765 x Raj 4079, Raj 4037 x Raj 4079 and Raj 4037 x Raj 3765 were found promising in both environments for grain yield and its most of the contributing traits. Hence, these crosses should be toss transgressive segregants for grain yield in the segregating generation and they can be used in further breeding programme. An overall assessment of the results of this study suggested that recurrent selection (Hull, 1945), diallel selective mating (Jensen,1970) and bi-parental mating (Joshi and Dhawan, 1966) might be effective breeding approaches for development of superior genotypes and appreciable improvement of bread wheat in future.