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Professor Jayashankar Telangana State Agricultural University, Hyderabad (Telangana State)

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2008 - 200922010 - 20121
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Thesis Type: Ph.D × Subject: Animal Genetics and Breeding ×
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    ThesisItemOpen Access
    GENETIC DIVERGENCE IN COTTON (Gossypium hirsutum L.)
    (ACHARYA N. G. RANGA AGRICULTURAL UNIVERSITY, RAJENDRANAGAR, HYDERABAD, 2008) ESWARA RAO, G; CHENGA REDDY, V
    The present investigation was carried out during kharif, 2007-2008 at Regional Agricultural Research Station, Lam Farm, Guntur with 60 genotypes of cotton (Gossypium hirsutum L.) to study the genetic variability, heritability, genetic advance as per cent of mean, genetic divergence, character association and the magnitude of direct and indirect effects of yield component traits with seed cotton yield in respect of 16 characters viz., plant height (cm), days to 50% flowering, number of monopodia per plant, number of sympodia per plant, number of bolls per plant, boll weight (g), ginning out-turn (%), seed index (g), lint index (g), 2.5% span length (mm), micronaire (10-6g/in), bundle strength (g/tex), uniformity ratio (%), fibre elongation (%), lint yield per plant (g) and seed cotton yield per plant (g). The genotypic coefficients of variation for all the characters studied were lesser than the phenotypic coefficients of variation indicating the masking effect of the environment. Number of monopodia per plant, number bolls per plant, lint yield per plant and seed cotton yield per plant exhibited moderate to high variability. High heritability coupled with high genetic advance observed in the case of number of monopodia per plant and lint yield per plant indicate the predominance of additive gene action and hence, simple selection might play a role to some extent. High heritability coupled with moderate genetic advance was observed in case of plant height, 2.5% span length and seed cotton yield per plant revealing the role of both additive and non additive gene action. The other traits viz., number of sympodia per plant, number of bolls per plant, boll weight, seed index and uniformity ratio showed moderate heritability and low genetic advance indicating major role of non additive gene action. The correlation studies revealed that plant height, number of sympodia per plant, number bolls per plant, boll weight, seed index, lint index, micronaire, uniformity ratio, elongation and lint yield per plant had significant positive association with seed cotton yield per plant. The path coefficient analysis revealed that plant height, days to 50% flowering, number of monopodia per plant, number of bolls per plant, seed index, lint index, uniformity ratio, and lint yield per plant exerted direct positive effect on seed cotton yield per plant. Selection based on these attributes may be helpful in evolving high yielding varieties of upland cotton. The results of multivariable analysis resulted in random distribution of 60 cotton genotypes into fourteen clusters in case of D2 analysis and into eight clusters in case of principal component analysis was at random indicating no relation between genetic diversity and geographical diversity. Based on the intra and inter- cluster distances among the groups, suggestions were made to attempt crosses after confirming their general combining ability between cluster VIII (CPD 787) and cluster X (CNHO 12), followed by cluster XIII (GISV 218) and cluster XIV (CSH 3047) to obtain better and desirable segregants. Principal component analysis identified six principal components (PCs), which contributed 78.21 per cent of cumulative variance. The population with high PC1 values were characterized by high number of monopodia per plant and bundle strength whereas, population with high PC2 values were characterized by lint yield per plant and number of bolls per plant. In PC3, characters like 2.5% span length and elongation showed maximum weightage. Therefore, major emphasis should be laid on selection process with more number of bolls per plant and simultaneous selection of other traits viz., boll weight, seed index, number of sympodia per plant and lint index for realizing higher seed cotton yield with desirable fibre quality.
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    ThesisItemOpen Access
    GENETIC DIVERGENCE IN CHILLI (Capsicum annuum L.)
    (ACHARYA N. G. RANGA AGRICULTURAL UNIVERSITY, RAJENDRANAGAR, HYDERABAD, 2008) KIRAN KUMAR, P; CHENGA REDDY, V
    The present study was conducted during kharif 2007 at Regional Agricultural Research Station, Lam Farm, Guntur with 57 genotypes of chilli (Capsicum annuum L.) which included collections from different geographic regions to study the genetic variability, heritability, genetic advance as per cent of mean, correlation, path coefficient analysis and genetic divergence. These genotypes were evaluated for 15 characters viz., plant height (cm), plant spread (cm), days to 50 % flowering, days to maturity, number of branches per plant, number of fruits per plant, 100-dry fruit weight (g), fruit length (cm), fruit girth (cm), number of seeds per fruit, 1000-seed weight (g), oleoresin (%), capsanthin (EOA colour value), capsaicin content (%) and dry fruit yield per plant (g). The genetic variability studies indicated that the material investigation possessed variability which provides sufficient basis for selection by the breeder High heritability coupled with high genetic advance as per cent of mean was observed for all the characters except days to 50 % flowering, days to maturity and 1000-seed weight. Correlation between dry fruit yield per plant and its determining characters inferred that plant height, plant spread, number of fruits per plant, fruit length, fruit girth and number of seeds per fruit had positive significant correlation with yield suggesting that effective improvement in yield can be achieved through selection based on these characters. Path analysis revealed high positive direct effect of fruit girth, fruit length, plant height, days to maturity, number of seeds per pod, plant spread and capsanthin content (EOA colour value). Hence, taller plants with more plant spread, fruit length, fruit girth, number of seeds per fruit and early maturity should be preferred while breeding for high dry fruit yield in chillies. The total 57 genotypes of chilli obtained from different agro-climatic zones were grouped into eighteen clusters in case of D2 analysis and 8 clusters in principal component analysis and the grouping of genotypes was at random. Oleoresin content contributed maximum towards diversity in D2 followed by capsaicin content and capsanthin content (EOA colour value). Principal component analysis identified five principal components, which contributed 84.17 % of the total variability of the genetic material. Capsaicin content and capsanthin content (EOA colour value) explained maximum variance in the first principal component, followed by oleoresin content. Based on D2 statistic, crosses are proposed to be attempted in future breeding programmes between cluster IX (LCA-825) and XVII (LCA-809), followed by cluster XVII (LCA-809) and IV (LCA-851) and cluster IV (LCA- 851) and VIII (LCA-846) to obtain desirable segregants. Agglomerative cluster analysis revealed wide genetic distance between clusters IV (LCA-815, LCA-847, LCA-334, LCA-850) and V (LCA-802, LCA-835, LCA-809, LCA-826) followed by clusters II (LCA-819, LCA-829, LCA-816) and IV (LCA-815, LCA-847, LCA-334, LCA-850) and II (LCA-819, LCA-829, LCA-816) and V (LCA-802, LCA-835, LCA-809, LCA-826). Hence, hybridization among these clusters would produce superior segregants. Based on the agglomerative cluster analysis, principal component analysis and D2 statistic, the genotypes LCA-816, LCA-815 and LCA-809 were from diverse groups and can be utilized in future hybridization programmes to produce superior segregants.
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    ThesisItemOpen Access
    ORGANISATIONAL CLIMATE OF TEACHERS IN ACHARYA N.G. RANGA AGRICULTURAL UNIVERSITY
    (ACHARYA N.G. RANGA AGRICULTURAL UNIVERSITY, 2012) RAVI TEJA NIRUJOGI; GOPI KRISHNA, T
    One of the popularly studied concepts of organisational behaviour namely, organisational climate was selected as the focus of the study. Organisational climate has a potentially rich, but largely unrealized role in the development of organisations as well as to raise the motivation of employees. Organisational climate perception was measured by using a scale, which consisted of 18 dimensions viz., organisational structure, supervision, decision making, communication, training strategy, job clarity, team work, performance appraisal, rewards, interpersonal relationships, conflict management, job stress, organisational stress, job satisfaction, class room facilities, laboratory facilities, library facilities, faculty with 76 statements. Data collection was done through well structured questionnaire. Ex-post-facto research design was used in the present study. The only Agricultural University which is existing in the state of Andhra Pradesh was selected purposively. There are eight Agricultural Colleges in ANGRAU. Out of them, two colleges have been established recently. Among the six remaining Agricultural Colleges, three agricultural colleges are old (Agricultural College, Bapatla; College of Agriculture, Rajendranagar and S.V. Agricultural College, Tirupati) and three Agricultural Colleges are new (Agricultural College, Naira; Agricultural College, Aswaraopet and Agricultural College, Mahanandi). Two among old colleges (Agricultural College, Bapatla and S.V.Agricultural College, Tirupati) and two among new colleges (Agricultural College, Naira and Agricultural College, Mahanandi) have been selected by random sampling. All teachers were selected by census method. The detailed analysis of profile of teachers indicated that majority of the teachers belong to young age, had doctoral degrees, 20 years of experience, belonged to assistant professor cadre, 40,000-80,000 salary per month, not received any trainings, 16-20 hours of teaching work load, 40 hours of general work load, 0-10 hours of internet exposure, lived in urban areas, travelled 0-10 km of distance. Regarding attitude towards job, job involvement, professional orientation, self confidence and level of aspirations most of the teachers belonged to medium categories, respectively. Majority of the teachers were coming under medium category regarding their perception on selected dimensions of organisational climate of ANGRAU. The correlation analysis revealed that age, work experience, general work load, attitude towards work, job involvement and level of aspirations were positively significant at 0.01 per cent level of probability with organisational climate of teachers. Teaching work load and professional orientation were found to be positively significant at 0.05 level of probability. All the independent variables taken together explained to the extent of 82.40 per cent to the total variance in the organisational climate. The most important constraints expressed by the teachers were policy of transfer is not good, inadequate budget for maintenance, delay in communicating information from top to bottom, centralized decision making, inadequate supervision from higher authorities, inadequate trainings, inadequate manpower, inadequate conveyance facilities for field and institutional visits, inadequate laboratory facilities, non availability of well equipped class rooms, inadequate library facilities, inadequate computer facilities, less scope for career growth, lack of inter departmental cooperation, lack of recognition for creative talents, overload of work, inadequate inter institutional linkages, long distance to travel from home to office, uncomfortable working time, dominance of isms (castism, nepotism), absence of cordial atmosphere, absence of mutual trust and respect . Important suggestions given by the teachers were change in transfer policy, adequate budgetary provisions for maintenance of departments, timely communication of institutional developments to teachers, decentralization of decision making, periodical supervision from the higher authorities, provision of adequate and up to date trainings, provision of trained manpower, provision of conveyance facilities for field and institutional visits, provision of advanced laboratory equipments, provision of computers and display equipments in the classrooms, improving the libraries with recent books and journals, providing computer with internet facility to all faculty members, timely recognition of the creative talents of teachers, timely filling up of vacant posts to strengthen the organisation, strengthening of inter departmental cooperation, fair performance appraisal system, avoidance of isms (castism, nepotism etc.), creating the cordial working atmosphere and instilling of mutual trust and respect.