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Subject: Plant Physiology × Author: P. S. Kiran × End date: 2021 × Start date: 2021 × Thesis Type: M.Sc ×
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    ThesisItemOpen Access
    Characterization of wheat germplasm for photosynthetic pigments in response to fertilizer application grown under late sown condition
    (CCSHAU, Hisar, 2021-09) P. S. Kiran; Goyal, Vinod
    Present investigation was conducted on 228 wheat germplasm lines with unknown nutrient use efficiency obtained from CIMMYT, Mexico through Department of Genetics and Plant Breeding, COA, Hisar for evaluation and photosynthetic characterization under late sown conditions and to find correlation between physiological traits with grain yield with two set of treatments viz. without fertilizer (-F) and with recommended dose of fertilizer (+F) (NPK at 100:40:30 kg ha-1). The experiment was conducted at the Research area of Wheat and Barley Section of Department of Genetics & Plant Breeding, CCS Haryana Agricultural University, Hisar during rabi 2020-21. Observations were taken at different stages of growth for physiological studies while yield characteristics were recorded at maturity. The plants were raised in field under fertilization and without fertilization condition under randomized block design. Under fertilized condition, all germplasm lines showed high vegetation index, Nitrogen balanced index (NBI), Chlorophyll index, Osmotic potential and Grain growth rate. Other than these parameters yield parameters like biomass, grain yield, no. of productive tillers, no. of grains/spike, grain weight/spike, spike length, 1000-grain weight also observed high under fertilized condition. Anthocyanins and flavonoids were found to be high in non-fertilized condition which indicated the presence of stress in the crop. It was found that the physiological parameters were positively correlated with fertilized application. The yield parameters and some physiological parameters showed positive correlation with fertilizer (+F) like NDVI, NBI, and GGR etc. while others were negatively correlated like anthocyanins, flavonoids, osmotic potential, canopy temperature (CT) etc. Germplasm lines 21, 44, 68, 159 and 206 performed better under -F condition while germplasm lines 11, 52, 140, 166 and 220 performed better under +F condition in terms of having higher NDVI, Nitrogen balanced index, chlorophyll index, grain growth rate, biomass, yield and its attributes. The study revealed that the impact of fertilization on crop growth is consistent irrespective of the germplasm. However, some germplasm behaved differentially owing to their inherent potential of nutrient use efficiency and the selected germplasm identified with higher physiological and nutrient use efficient traits may be utilized in conventional breeding programs to better exploit higher NUE efficiency traits.