Vol. 11, Issue 7 (2022)

Author(s):
Narendra Pratap Verma, RK Yadav, AK Singh, Shambhoo Prasad, Pratibha Singh, Alok Kumar Singh and Pradip Kumar Saini

Abstract:
The investigation entitled Identification and evaluation of rice (Oryza sativa L.) genotypes for drought and salinity tolerance: growth and yield approach” was conducted during Kharif season, 2020-21 and 2021-22 at the field of Student’s Instruction Farm, Acharya Narendra Deva University of Agriculture & Technology, Kumarganj, Ayodhya-224 229 (Uttar Pradesh). In same manner 72 rice genotypes/varieties were grown for phenotype screening for Salinity in Augumented Block Design in saline soil with four checks (two resistant check Narendra Usar Dhan 3 and CSR -10, two susceptible check Barani Deep and Jaya) and growth and yield parameters data were recorded. i.e., Plant height at 65, 80 DAT (cm), Plant height at maturity (cm), Tiller number plant^-1 (count), Flag leaf area (cm²), Fresh weight plant^-1 (g), Dry weight plant^-1 (g), Panicle length (cm), Numbers of grains panicle^-1 (count), Test weight (g), Grain Yield plant^-1 (g). Reduction in growth parameters like, plant height, tiller number shoot fresh weight and dry weight was noted in all 40 genotypes under low moisture stress as well as in salinity stress. Drought tolerant variety Nagina-22 show minimal reduction in above said character under low moisture stress. While drought susceptible variety IR-64 show maximum reduction in these character under low moisture stress. In salinity stress salt tolerant variety CSR-10 & Narendra Usar -3 show less reduction with respect to susceptible varieties Jaya which show maximum reduction under salinity condition and Yield component like, Panicle length, total number of grains, test weight, and yield per plant of all verities decreased under both low moisture stress and salinity stress. However under drought condition, maximum reduction was noticed in IR-64 followed by Jaya while lowest reduction was seen in Nagina-22 followed by DRR-44, DRR-42 Sukha Dhan-5 & Sushk Samrat. In case of salinity stress minimum reduction in yield attributing traits was seen in tolerant varieties CSR-10, Narendra Usar-3, CSR-36, CSR-43 & Narendra Usar-2 while maximum reduction was found in susceptible varieties, Barani Deep, Jaya & IR-64.