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University of Agricultural Sciences, Raichur (2018)

SCREENING OF CHICKPEA (Cicer arietinum L.) LINES FOR DROUGHT TOLERANCE

MAHESHANKAR

Titre : SCREENING OF CHICKPEA (Cicer arietinum L.) LINES FOR DROUGHT TOLERANCE

Auteur : MAHESHANKAR

Université de soutenance : University of Agricultural Sciences, Raichur

Grade : Master of Science (MS) Crop Physiology 2018

Résumé
The present investigation was conducted at Agricultural Research Station, Kalaburgi, University of Agricultural Sciences, Raichur, during the rabi2017-18 for the screening of chickpea lines for drought tolerance. Among two experiments conducted, the first experiment was laid out in split plot design which consists of twelve genotypes sown in the field under irrigated and non irrigated condition to evaluate morpho-physiological, biochemical and yield parameters, whereas second experiment was conducted for root characterization study of same genotypes in PVC pipes. The field experiment was replicated thrice. The interaction effects between irrigation and genotypes and growth behavior was studied during 35 DAS, 55 DAS, 75 DAS and harvest stage. Significant changes in the plant height, biomass, growth parameters and root traits (root length and root mass) under both irrigated and non-irrigated condition were recorded, indicating the effect of moisture stress on plant.Among the genotypes, RKD-1 shows significantly higher plant height, number of branches, growth parameters such as AGR, CGR, LAI and also proline content (8.66 μ mole g-1 fresh wt.),relative water content (71.28%) and least values were recorded inRVSSG-52 (6.46 μ mole g-1 fresh wt., 59.94%, respectively) under both irrigated andnon irrigated conditions. Similarly, lower membrane injury index (31.73%) was recorded in RKD-1 compared to of JG-11 (check) (33.47%).Under both irrigated and non-irrigated condition higher yield parameters such as number of pods per plant, seed yield and harvest index were recorded in RKD-1 (48, 1991 kg ha-1 and 43.34%)compared to of JG-11 (check) (46, 1954 kg ha -1 and 41.32%). Genotypes showing higher amount proline content, relative water content along with lower leaf water potential and membrane injury index coupled with deeper root length are attributed for the drought tolerance.

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