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• W2508969064 abstract "The present investigation was carried out during Kharif 2011-12 with three dates of sowing at an interval of 30 days viz., first date of sowing i.e., June sowing, second date of sowing i.e., July sowing and third date of sowing i.e., August sowing. These three experiments were conducted at Agricultural College Farm, Mahanandi campus of Acharya N. G. Ranga Agricultural University in Randomized Block Design with three replications with an objective to study the variability and genetic parameters, stability analysis, character association, path co-efficient analysis and reaction of blast disease among 21 diverse genotypes of rice (Oryza sativa L.) for thirteen yield and yield components. Analysis of variance indicated significant differences among the genotypes for all the traits in each of date of sowing as well as over the date of sowings.The genotypes viz., NLR 40024, RNR 2354 and NLR 145 under early sowing; WGL 32100, BPT 2231 and MTU 1010 for normal date of sowing, BPT 5204, NLR 40024 and JGL 3844 for late sowing; could be utilized in the breeding programme for yield improvement possessing all the desired per se performance for yield and yield components viz., number of productive tillers, panicle length, number of grains per panicle and test weight. The estimates on genetic parameters revealed that the high GCV coupled with high heritability and high genetic advance were observed for number of ill filled grains per panicle, number filled grains per panicle, number of grains per panicle, number of productive tillers per plant and test weight in early sowing; number of ill filled grains per panicle and test weight in normal sowing; number of ill filled grains per panicle, number filled grains per panicle and number of grains per panicle in late sowing indicates the preponderance of additive gene 14 action and such characters could be improved through selection in respective environments. High heritability estimates was observed for all characters over three environments indicating less influence of environment. Both additive and nonadditive gene effects were implied for grain yield per plant among genotypes under experimentation. Hence, intermating of elite genotypes followed by selection may be rewarding for genetic enhancement of grain yield and its components with the present experimental material. Stability analysis by Eberhart and Russell model (1966) revealed Genotype x Environment interactions for all the characters was significant implying differential response of genotypes under three environments for all characters. The linear component of genotype x environment interaction was highly significant than non linear component of genotype x environment interaction for most of the characters studied indicating the significant difference among the genotypes for linear response to environments behaviour of the genotypes could be predicted over environments more precisely. Based on stability parameters, JGL 3855 expressed average stability suitable to all environments for grain yield per plant, NLR 40024 and JGL 3844 considered as high responsive genotypes specifically suitable to early and late sowings; WGL 32100 and MTU 1001 were considered as low responsive genotypes and are proposed specifically for normal sowing for grain yield per plant. The genotypes JGL 3855, NDLR 7, NDLR 8 and RNR 2354 were considered as stable performer for most of the characters and can be recommended to any sowings because of their average performance. The genotypes NLR 40024, JGL 3844, JGL 3855, RNR 2354, JGL 11470 and MTU 1010 found as high responsive for most of the characters and can be recommended to early date of sowing because of their high performance. The genotypes MTU 1001, WGL 32100, WGL 23985 and NLR 145 found to be low responsive and can be recommended to delayed sowings because of their low performance. Based on correlation studies, number of productive tillers per plant, total number of tillers per plant and harvest index was significantly correlated to yield per plant for all the three dates of sowing. Hence for Rice improvement programme, major thrust should be given on these traits in the respective environments. On contrary, number of ill filled grains per panicle in early sowing, plant height, panicle length and number of grains per panicle in late sowing exhibited significant correlation with grain yield per plant. Therefore, simultaneous selection or in opposite direction may be done for these characters to have yield improvement in rice for respective conditions." @default.
• W2508969064 created "2016-09-16" @default.
• W2508969064 creator A5028877395 @default.
• W2508969064 date "2012-01-01" @default.
• W2508969064 modified "2023-09-27" @default.
• W2508969064 title "STUDIES ON STABILITY ANALYSIS OF RICE (Oryza sativa L.)" @default.
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