Physiological analysis of promising rice genotypes for yield and yield contributing traits
Loading...
Files
Date
2022-11-30
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Vasantrao Naik Marathwada Krishi Vidyapeeth, Parbhani
Abstract
An experiment was conducted at research farm Upland Paddy Research Scheme (UPRS), VNMKV, Parbhani during Kharif season 2021 entitled as “Physiological analysis ofpromising ricegenotypes foryield and yield contributing traits.”The investigation was undertaken to study the variation in yield and to determine correlation between grain yield and morpho-physiological parameters ofrice genotypes. The experimental plot was laid out in randomized block design with twelve rice genotypes and 3 replications.
The rice genotypes showed significant variations for morpho-physiologicalparameters, yield attributes and biochemical traits. Among the twelve rice genotypes, PBNR 14-07 followed by PBNR 14-11 recorded maximum plant height, number of tillers and number of leaves, whereas PBNR 15-10 recorded minimum plant height and PBNR 14-17 recorded minimum number of tillers and number of leaves. PBNR 14-15 and PBNR 15-10 took maximum days to 50 percent flowering and days to maturity, whereas PBNR 15-05 took less time for days to maturity. Therewas significant increase in plant dry weight at all the stages till maturity among the rice genotypes. The highest plant dry weight was recorded in genotype PBNR 14-07 followed by PBNR 14-11, while minimum was recorded in genotype PBNR 15-10.
Physiological indices viz. LA, LAI, CGR, RGR and NAR varied significantly among the rice genotypes. PBNR 14-07 genotype achieved maximum LA, LAI, CGR, RGR and NAR.Leaf area, LAI, CGR, RGR increased gradually up to 30 to 60 DAS and later on declined during 90 DAS.NAR decreased with the age of crop. Genotype PBNR 14-07 and PBNR 14-11recorded maximum LA, LAI and RGR whereas, lowest was recorded by genotype PBNR 15-10. At 60 DAS maximum CGR was recorded in PBNR 14-07 followed by PBNR 14-11 and minimum CGR in PBNR 14-17. Maximum NAR was recorded by genotype PBNR 14-21 followed by PBNR 14-15 and minimum NAR was recorded by PBNR 14-15 at 30 DAS.
Grain yield and yield attributes varied significantly among the rice genotypes. Highest number of panicles, number of spikelets, number of filled grains per panicle, 1000 grain weight, grain yield per plant, grain yield per plot and harvest index were recorded in genotype PBNR 14-07 followed by PBNR 14-11, whereas minimum number of panicles, was recorded in genotype PBNR 15-10 and minimum number of spikelets, number of filled grains per panicle, 1000 grain weight and grain yield per plant were recorded in genotype PBNR 14-18. Minimum number of grain yield per plot and harvest index were recorded in genotype PBNR 14-15. Maximum number of unfilled grains was recorded in genotype PBNR 15-10 followed by PBNR 14-11 and minimum number of unfilled grains was observed in PBNR 14-07.There was no significant variation for panicle length among the rice genotypes. Maximum panicle length was recorded in genotype PBNR 14-07 followed by PBNR 14-11and minimum panicle length was recorded in genotype PBNR 15-10.
SPAD values differed significantly among the rice genotypes. Maximum SPAD values were recorded for genotype PBNR 14-07 followed by PBNR 14-11 and minimum was recorded in genotype PBNR 14-18. The highest protein content was recorded in the grains of genotype PBNR 14-07 followed by PBNR 14-11 and minimum in the genotype PBNR 15-02. Protein content of experimental genotypes varied significantly.Carbohydrate content was recorded highest in PBNR 14-07 followed by PBNR 14-11 and lowest was recorded by genotype PBNR 15-10. There was no significant variation in carbohydrate content of experimental rice genotypes.
Plant height and number of tillers exhibited a highly significantly positive correlation with grain yield.