Morpho-physiological characterization and yield attributes of aerobic rice (Oryza sativa L.)

Abstract

The field experiment entitled “Morpho-physiological characterization and yield attributes of aerobic rice (Oryza sativa L.)” was conducted during Kharif 2024 at the Quality Seed Production Farm, Shendra ‘A’, Vasantrao Naik Marathwada Krishi Vidyapeeth (VNMKV), Parbhani, Maharashtra. The experiment was laid out in a randomized block design with 14 rice genotypes including 2 checks and three replications. The objective was to study the variation in yield and its attributes, and morpho-physiological traits among rice genotypes. Observations were recorded on morpho-physiological parameters viz., plant height, number of effective tillers, number of leaves, days to 50% flowering, days to maturity and yield attributes viz., panicle length, number of grains per panicle, 1000 grain weight, grain yield per hectare, and harvest index. Maximum plant height was recorded in genotype PBNR 03-2, and minimum in PBNR 21-10. Maximum days to 50% flowering were observed in PBNR 21-4, while PBNR 21-12 showed the minimum. Avishkar required the longest duration to maturity, while PBNR 21-3 and PBNR 21-11 had the shortest. The highest number of tillers was recorded in PBNR 21-7, and the lowest in PBNR 21-9. Maximum number of leaves at 60 DAS were found in PBNR 03-2, followed by Avishkar; the minimum was in PBNR 21-8. PBNR 21-3 showed the highest grain yield and SPAD reading, followed by PBNR 21-7 and Avishkar. Lowest yield was in PBNR 21-12; lowest SPAD in PBNR 21-11. Highest harvest index was in PBNR 21-3, lowest was in PBNR 21-12. Based on results, PBNR 21-3 and PBNR 21-7 were the best performers, while PBNR 21-9 and PBNR 21-12 performed poorly in most parameters.