GENETIC VARIABILITY AND CHARACTER ASSOCIATION OF YIELD AND YIELD RELATED TRAITS IN RICE (Oryza sativa L.)

S. CHOWHAN¹, B. SINGH²*, L.K. LODHI^3
1Department of Genetics and Plant Breeding, Faculty of Agriculture Science and Technology, AKS University, Satna, 485001, Madhya Pradesh, India
²Department of Genetics and Plant Breeding, Faculty of Agriculture Science and Technology, AKS University, Satna, 485001, Madhya Pradesh, India
³Department of Genetics and Plant Breeding, Faculty of Agriculture Science and Technology, AKS University, Satna, 485001, Madhya Pradesh, India
* Corresponding Author : vinee.rajput@gmail.com

Received : 04-06-2023     Accepted : 28-07-2023     Published : 30-07-2023
Volume : 15     Issue : 7       Pages : 12515 - 12519
Int J Agr Sci 15.7 (2023):12515-12519

Keywords : Rice, Genetic parameters, Correlation, Path analysis
Conflict of Interest : None declared
Acknowledgements/Funding : Authors are thankful to Department of Genetics and Plant Breeding, Faculty of Agriculture Science and Technology, AKS University, Satna, 485001, Madhya Pradesh, India
Author Contribution : All authors equally contributed

The present investigation was conducted to examine the 17 rice genotypes including one checks to study the genetic parameters, correlation and genetic diversity. The experiment was carried out in Research Farm Genetics & Plant Breeding of AKS University, Satna, M.P., during kharif season, 2021-22 in Randomized Block Design (RBD) with three replications. Analysis of variance showed highly significant differences among 17 rice genotypes for 12 characters studied. The results showed that some traits have moderate to high levels of variability, while others have low levels of variability. ECV had the fastest rate of days to 50% flowering, while PCV had the tallest plants and the highest values in most of the traits that impact the grain yield. The heritability of most of the traits was high, with a minimum of 68.1% and a maximum of 96.8%, indicating that a significant portion of the variation in these traits can be attributed to genetics. The results can be used to prioritize traits in breeding programs and make informed decisions about which traits to focus on for improvement. The study found significant and weak correlations between grain yield per plant and various traits in rice. The study also found that harvest index, biological yield per plant, and days to 50% flowering have the highest positive direct effect on grain yield. The characters that were studied were found to be appropriate for the study due to low residual effects. The study results can be useful for rice breeders in selecting specific traits that positively impact grain yield. The indirect effects of germination percentage showed that total seedling length and root dry weight have a positive effect on grain yield through these traits

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