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International Conference on Reimagining Rainfed Agro-ecosystems: Challenges & Opportunities during 22-24, December 2022 at ICAR-CRIDA, Hyderabad References Gangadhara, T. C. 2013. Evaluation of elite cluster bean [Cyamopsis tetragonoloba (L.) taub.] genotypes for vegetable and gum purpose in the northern dry zone of Karnataka. M. Sc. (Hort) Thesis, University of Horiculture Sciences, Bagalkot (India). Purseglove, J. W. 1981. Leguminosae. Tropical Crops: Dicotyledons. Longman Group Ltd, Essex, U. K. Pp- 250-254. Reddy Rajashekar Dodla, Saidaiah, P., Reddy Ravinder, K., and Pandravada, S. R. 2017. Mean performance of Cluster Bean Genotypes for Yield, Yield Parameters and Quality Traits. Int. j. curr. microbiol. appl. sci. 6(9): 3685-3693. Satpal, Panchta R., Arya, S., Singh, D. P., Suresh Kumar, and Neelam. 2020. Performance of cluster bean genotypes as influenced by crop geometry and fertilizer levels. Forage Res. 45 (4): 314-317. T3-37P-1245 Screening Maize Inbred Lines Developed from Local Germplasm for Excess Moisture Tolerance E. Lamalakshmi Devi 1* , Krishnappa Rangappa 2 , Ayam Gangarani 3 , Ch. Chinglen Meetei 1 , Yankey Bhutia 1 , Harendra Verma 4 , B. U. Choudhury 2 and R. Laha 1 1 ICAR-RC- NEH Region, Sikkim Centre, Tadong, Sikkim, India; 2 ICAR RC NEHR, Umiam, Meghalaya, India; 3 ICAR-RC- NEH Region, Lembucherra, Tripura, India; 4 ICAR-RC- NEH Region, Medzhiphema, Nagaland, India * elangbamlama@gmail.com North- Eastern regions of India are the biodiversity hub for many crops but these regions are often exposed to adverse climatic conditions like flood, drought, cold, soil acidity, etc. During the monsoon season, farmers often faced flooding condition/ soil saturation due to heavy rainfall and during the rabi season, drought/ water scarcity is the main challenge. The vegetative stage is considered one of the most critical periods affected under waterlogged conditions. In maize, Root System Architecture (RSA) is a key determinant of nutrient and water uptake efficiency (Liu et al. 2017) and thus, root traits are emerging as effective parameters that can be targeted for screening genotypes tolerant to waterlogged condition in maize. It is promising to manipulate RSA towards distribution of roots to optimize water and nutrient uptake under stressful condition. Keeping in view the existence of different local landraces of maize adapted in highly rainfall areas of the region, the present study was undertaken to phenotype and screen the diverse landraces of maize collected from different 413 | Page Managing genetic resources for enhanced stress tolerance
International Conference on Reimagining Rainfed Agro-ecosystems: Challenges & Opportunities during 22-24, December 2022 at ICAR-CRIDA, Hyderabad parts of North-Eastern region of India based on root architecture for their tolerance to waterlogged condition at vegetative stage. Methodology A total of 37 inbred lines (32 from ICAR, Sikkim Centre and 5 from ICAR-IIMR, Ludhiana) were used for the present study. The evaluation of landraces for waterlogging tolerance at V 5- 6 stage was undertaken under 2 sets of experiments viz., field and microcosm in 2 replications at Research farm of ICAR-RC-NEH Region, Sikkim Centre during 2022. For screening, artificial flooding was provided at V 5-6 stage to a depth of 20cm above the soil surface continuously for 15 days and data are recorded based on maize Shovelomics. The “Response Coefficient” (RC) as phenotypic plasticity index (Poorter and Nagel 2000, Abenavoli et al. 2016) and Waterlogging Tolerance Index (WTC) (Liu et al. 2010) were calculated. Results Root scanner images of the roots of inbred lines showed sharp differences between the control and waterlogged conditions. Based on visual scoring of root architecture using Shovelomics, score ranged from 1 to 9 for the traits brace roots angle (BA), brace roots branching density (BB), crown roots number (CN), crown root s angle (CA) and crown roots branching (CB). Some of the promising lines identified based on WTC and RC values from the 1 st year trail were UMI-1810, IML-418-1, RCS-31(Mani-31-2-2), RCS-29 (Mizo-29-4-1), RCS-4 (Mani-4- 1-1) and RCS-21(Mizo-21(B)-2-3). Root scanner images of roots of maize inbred lines under waterlogged and control conditions Managing genetic resources for enhanced stress tolerance 414 | Page
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Extended Summaries 22-24 December,
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Citation Rama Rao, C.A., Srinivasa
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Resilience through land and water m
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Theme- 2 Ecosystem based approaches
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Resource conservation and rainfed a
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