The present research consists of 12 rice (Oryza sativa L.) genotypes and the experiment was conducted during June- November 2017 in Randomized Block Design with three replication at NARC, Kumaltar. The data were recorded for ten quantitative characters to study genetic variation, heritability, genetic advance and correlation coefficient analysis. Analysis of variance among 12 genotypes showed a significant difference for all characters studied except non-effective tillers.
Grain yield had a positive significant correlation with SPAD and positive correlation with 1000 grain weight, flag leaf area, days of 50% flowering, plant height, a number of effective tiller and panicle length whereas negative significant correlation with a number of a non-effective tiller and negative correlation with days of 90%maturity. A moderate genotypic coefficient of variation (GCV) and phenotypic coefficient variation (PCV) was observed for flag leaf area and followed by grain yield and number of effective tiller, that these characters could be used as a selection for crop improvement.
High estimates of heritability were observed for days of 50% flowering and followed by panicle length, flag leaf area, test weight and days of 90% maturity. A high genetic advance was found in a number of non-effective tillers, grain yield per meter square, no of an effective tiller and flag leaf area indicating pre-dominance of additive gene effects and possibilities of effective selection for the improvement of these characters.
Inhaltsverzeichnis (Table of Contents)
- INTRODUCTION
- MATERIALS AND METHODS
- Experimental details
- Statistical analysis
- Genotypic and phenotypic coefficient of variation
- Broad sense heritability (H²bs)
- Genetic advances (GA)
- RESULTS AND DISCUSSION
- CONCLUSION
- REFERENCES
Zielsetzung und Themenschwerpunkte (Objectives and Key Themes)
The primary objective of this research is to investigate the genetic variation and correlation between different traits in rice genotypes grown under rainfed conditions in Nepal. The study aims to understand the degree of genetic variability, heritability, and genetic advance for key agronomic traits, as well as their interrelationships with grain yield.
- Genetic variation and heritability of agronomic traits in rice genotypes
- Correlation analysis between yield and its components
- Influence of environmental factors on rice growth and yield
- Potential for genetic improvement of rice genotypes under rainfed conditions
- Implications for breeding programs and selection criteria
Zusammenfassung der Kapitel (Chapter Summaries)
- INTRODUCTION: The study emphasizes the significance of rice as a staple food crop globally and particularly in Nepal. It highlights the challenges faced by rainfed rice production due to drought and the need for improved genotypes with high yield potential under stress conditions. The importance of genetic variation and correlation analysis for efficient breeding programs is emphasized.
- MATERIALS AND METHODS: This chapter details the experimental design and procedures used in the study. It includes information about the rice genotypes, experimental site, planting methods, data collection, statistical analysis, and the calculation of genetic parameters such as genotypic and phenotypic variation, heritability, and genetic advance.
- RESULTS AND DISCUSSION: This section presents the findings of the research, including the analysis of variance results and discussion of the genotypic and phenotypic variance, heritability, genetic advance, and correlation analysis among the studied traits. It highlights the significant differences among genotypes for most traits and the potential for selecting genotypes with desired characteristics.
Schlüsselwörter (Keywords)
This research focuses on genetic variation, heritability, genetic advance, correlation, and rice. Key topics include the study of quantitative traits, environmental influences on yield, the effectiveness of selection criteria, and the identification of genotypes with high yield potential under rainfed conditions.
- Quote paper
- Narayan Neupane (Author), 2019, Genetic Variation and Correlation of Spring Rice Genotypes in Mid-Hill's Rainfed Condition of Nepal, Munich, GRIN Verlag, https://www.grin.com/document/454179
