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20183
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Subject: Seed Science and Technology × End date: 2018 × Start date: 2018 × Type: Thesis × Thesis Type: M.Sc ×
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    ThesisItemOpen Access
    Morpho-physiological characterization of wheat (Triticum aestivum L.) under normal and late sowing conditions
    (CCSHAU, 2018) Mohammad, Wasim; Mor, V.S.
    A study was conducted on ―Morpho-physiological characterization of wheat (Triticum a estivum L.) under normal and late sowing conditions‖ by applying 26 morphological qualitative and quantitative traits to characterize the 30 wheat genotypes. The qualitative traits like coleoptile colour, plant growth habit, auricle colour, flag leaf attitude, outer glume pubescence, shoulder width and shape were found to be most important diagnostic characters for genotype identification of wheat. There was no change in their state of expression with respect to change in the sowing time. The waxiness of ear, sheath, blade and peduncle were the supportive traits used for genotype identification. The phenol test was resulted in clear cut categorize genotypes into different groups on seed basis. The ranking of phenol test was found stable in seeds produced under both dates of sowing. The quantitative traits decreased significantly under late sown conditions as compare to normal sown condition. The clustering analysis was done on the basis of their traits which classified 30 wheat genotypes into nine distinct clusters under normal and late sown conditions. The schematic diagrams were made on the basis of morpho-physiological traits. The identification keys were developed to identify all the genotypes under study. Some genotypes had specific character through which they can be identified easily viz. WH 1322 have coleoptile colouration, WH 1025 have prostrate plant growth habit, C 306 have pale green foliage colouration, WH 1221 have very strong flag leaf waxiness on blade, PBW 550 have glume pubescence, WH 711 have lower glume: shoulder width and elevated shaller shape. The seed physiological traits resulted that the bold and vigorous seeds of all wheat genotypes with higher yield can be produced under normal sown conditions.
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    ThesisItemOpen Access
    Effect of sowing dates and cuttings on seed yield and quality in oat (Avena sativa L.)
    (CCSHAU, 2018) Digamber; Punia, R.C.
    Seed quality is a vital factor in the crop establishment and overall performance of the crop. Oat is used in India both as feed and fodder. The non-availability of quality seeds of improved varieties is a crucial factor in popularization of fodder crop. Availability of viable and vigorous seed at the planting time is important for achieving targets of agricultural production because good quality seeds act as a catalyst for realizing the potential of other inputs. Keeping in view the seed quality, investigation was carried out in the laboratory and research farm of Department of Seed Science and Technology, Chaudhary Charan Singh Haryana Agricultural University, Hisar during rabi 2016- 17. The variety of oat used was HJ-8. Three different sowings were done on 6th Nov, 2016; 2nd Dec, 2016 and 2nd Jan, 2017 in order to study the effects of sowing dates, days to foliage cut after sowing and stubble height from ground level on seed yield and quality. The date of sowing have significant effect on seed yield and quality of oat. The maximum seed yield (13.8 q/ha) with better seed quality was found in normal sown crop D1 (6th November) followed by (11.4 q/ha) late sown crop D2 (2nd December). Low seed yield (5 q/ha) along with poor seed quality was observed in very late sown crop D3 (2nd January). One foliage cut at 65 DAS (Normal Sowing) and 50 DAS (Late Sowing) can be taken for getting additional fodder yield without affecting the seed yield and quality to a much extent. The stubble height from ground level should be left approximately 10 cm for better regeneration for better seed yield and quality for seed production.
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    ThesisItemOpen Access
    Effect of planting season on seed yield, yield components and seed quality in maize hybrids (Zea mays L)
    (CCSHAU, 2018) Nidhi; Bhuker, Axay
    Four maize hybrids produced during rabi and kharif seasons were evaluated for their performance for different viability, vigour and yield parameters viz. standard germination, seedling length, seed weight, seed density, seedling dry weight, vigour index-I, vigour index-II, accelerated ageing test, electrical conductivity, tetrazolium test, dehydrogenase activity test, catalase activity test, peroxidase test, lipid peroxidation test, protein content, field emergence index, seedling establishment, number of leaves, number of cobs, cob length, plant height, days to 50 % tasseling, days to 50% silking, number of seeds per cob and seed yield to assess the effect of planting season on seed yield, yield components and seed quality in maize hybrids. The rabi season produced seed showed superiority over kharif season for all the seed quality and yield parameters. Among the hybrids, HQPM-5 had the top rank for almost all the vigour, viability and yield parameters in both the seasons (rabi and kharif) indicating its superiority over other hybrids. Standard germination was found significantly and positively correlated with most of the seed quality parameters except electrical conductivity and lipid peroxidation in both the seasons. Electrical conductivity and lipid peroxidation was found significantly and negatively associated with most of the parameters recorded in laboratory and field. On the basis of correlation study, it can be concluded that the viability test like tetrazolium test, electrical conductivity test, dehydrogenase activity test, accelerated ageing test, catalase activity test and lipid peroxidation test can be used as reliable predictor of standard germination in maize and rabi season can be considered as a better option for the production of quality seed in maize in Haryana