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Agriculture University, Jodhpur

Agriculture University, Jodhpur was established on 14th September, 2013 by Government of Rajasthan under Agriculture University, Jodhpur Act 21 of 2013 to focus on holistic development of arid and semi-arid regions of the state covering 6 districts (Jodhpur, Barmer, Nagaur, Pali, Jalore and Sirohi), constituting 28% of total geographical area which is sustaining 20.8% human and 28.4% animal population of the state. The districts under jurisdiction of the university cover 3 agro-ecological zones of the state. These are Arid Western Plain Zone Ia (Jodhpur and Barmer districts), Transitional plain of Luni Basin Zone IIb (Jalore, Pali, and Sirohi districts) and part of Transitional Plain of Inland Drainage Zone IIa (Nagaur district). The university has 1 institute of diploma and 3 colleges to produce highly competent educated human resources in agriculture and allied sciences besides 2 agricultural research stations, one each in zone Ia & IIb and 3 agricultural research sub stations, one in each zone to prepare, plan and perform highly need based research in this acute water scarce but naturally rich bio-diversified zone of the country. The third most important part in tri-pillar (Teaching, Research & Extension) of agricultural development, the extension for transfer of technologies are reached to doorsteps of the farming community by 6 Krishi Vigyan Kendras (K-V-Ks), 2 in Nagaur district and 1 each in Jodhpur, Barmer, Jalore & Sirohi districts under the umbrella of the university. The different units of teaching, research and extension are coordinating to systematically run by the headquarter situated at Mandor, Jodhpur.

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Author: Kherwa, Radhe Shyam × End date: 2024 × Start date: 2020 × Thesis Type: Ph.D ×
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    ThesisItemOpen Access
    Heterosis and Combining Ability Studies for Yield and Component Characters in Brinjal (Solanum melongena L.) Over Different Seasons
    (Agriculture University, Jodhpur, 2022-03-12) Kherwa, Radhe Shyam; Bhardwaj, Raju Lal
    An investigation was undertaken with a view to evaluate the magnitude of heterosis, combining ability, G x E interactions and stability parameters for fruit yield and its component characters following Line × Tester design involving (4 females and 8 males) varieties/genotypes of brinjal (Solanum melongena L.). These twelve parents and their 32 F1s with Pusa Uttam as standard check were tested for sixteen characters under three growing transplanting season. viz., E1: Summer Season – April, E2: Kharif Season – July, E3: Early Winter Season – October, in the year of 2020-2021, at Instructional Farm, College of Agriculture, Jodhpur, in randomized block design with three replications. The analysis of variance for all the traits revealed presence of considerable genetic variability in the genotypes studied. Appreciable influence of environment which showed the genotype × environment interaction was significant for all the characters. While the mean squares due to G × E interactions were significant for most of the traits. The most heterotic crosses over mid parent, better parent and standard check for fruit yield and other contributing characters were PR-5 × BCB-71-1, PR-5 × Swarna Mani, PLR-1 × Swarna Mani, PLR-1 × BCB-71-1, PLR-1 × BCB-464, PR-5 × BCB-464, VR-2 × CO-2, IIHR- 563 × BCB-71-1 and IIHR- 563 × BCB-464. These crosses were considered promising for their use for improvement of yield characters with earliness and quality traits in brinjal. The environment wise combining ability analysis revealed significant differences for gca and sca variances for all the characters indicating importance of both additive and non-additive gene effects in the genetic control of all the characters studied. The mean sum of squares due to females × environments (seasons) were significant for fruit yield which indicated that gca variance of females were influenced by the environments. The combining ability studies indicated that among female parents, PR-5, PLR-1 and VR-2, whereas among male parents BCB-464, BCB-71-1, Swarna Mani and CO-2 were emerged as good general combiners for fruit yield and most of the contributing characters. Whereas, the crosses viz., PR-5 × BCB-71-1, PR-5 × BCB 464, PLR-1 × BCB-71-1, PLR-1 × Swarna Mani, VR-2 × CO-2, IIHR- 563 × BCB 464 and VR-2 × Swarna Mani were exhibited high sca effect for fruit yield and most of the contributing characters. These crosses could be of immense potential in brinjal improvement programme. The analysis of variance of phenotypic stability indicated highly significant G × E interaction for most of the traits indicating differential response of genotypes to varied environments. The mean sum of squares due to pooled deviation (non-linear) were also significant for most of the characters indicating role of unpredictable causes affecting stability and the prediction of these attributes would be difficult. Joint consideration of mean performance and stability parameters revealed that parents BCB-464, BCB-71-1, PR-5, IIHR- 563, Swarna Mani and PLR-1 was more responsive for fruit yield and associated characters, therefore these were considered suitable for better environment. The crosses PR-5 × BCB-464, PR-5 × BCB-71-1, PLR-1 × BCB-71-1, PLR-1 × Swarna Mani, IIHR- 563 × BCB-71-1 and PLR-1 × BCB-464 was stable over wide range of environments for most of fruit yield traits with earliness and quality attributes, showing their suitability for variable environments. Overall, on the basis of high per se performance, significant gca effects for fruit yield with earliness as well as quality characters and stability, the parents PR-5, BCB-464, BCB-71-1, PLR-1 and Swarna Mani were found superior. Out of 32 crosses studied, PR-5 × BCB-464, PR-5 × BCB-71-1, PLR-1 × BCB-71-1, PLR-1 × BCB-464 and PLR-1 × Swarna Mani were found to have superior on the basis of high per se performance, sca effects, significant heterotic effect in desirable direction and good stability in all three environments as well as poled over environments for fruit yield and most of the associated traits like earliness and quality traits, offer good opportunity for future brinjal improvement programme.