Genetic Parameters for Sorghum Varieties in Different Population Densities

Kareema Mohamad Wuhaib

doi:10.11648/j.ijaas.20170301.12

Abstract

Experiments were carried out at Field Crop Dept., College of Agric., Univ. of Baghdad, during spring and fall seasons of 2013. The objectives were to estimate the:1- Phenotypic, genotypic and environmental variations, 2- Genotypic and phenotypic coefficient of variation and 3- broad sense heritability for seven traits days to 50% anthesis (DTA), plant height (PH), leaf area (LA), panicle length (PL), panicle weight (PW), crop growth rate (CGR), and grain yield per plant (GY). These traits and variances were recorded on three genotypes of sorghum (Sorghum bicolor L. Moench), Enqath, Rabih, and Kaffier. Results of statistical analysis showed that most traits had higher genotypic and phenotypic variances than environmental variance estimate, which indicated these traits were genotypic origin, and can be exploited in breeding programs. The genotypes exhibited varying degrees ratios of heritability for most traits. Such traits were responded positively to selection due to high broad sense heritability estimates. These data demonstrated high diversity for the traits studied of genotypes used.

Highlights

Najeeb et al, [8] illustrated that traits with high heritability can be fixed with simple selection resulting in quick progress, but it has been emphasized that heritability alone has no practical importance without genetic advance
Individual and the combined analysis indicated that most traits had higher genotypic and phenotypic variance components than the environmental variance estimates, which is indicative that traits expression in this sorghum population was genetic and can be exploited in breeding programs [12]
Evaluation of components of variation and heritability for many traits will be facilitate improvement of crops, such as sorghum the Kareema Mohamad Wuhaib et al.: Genetic Parameters for Sorghum Varieties in Different Population Densities objectives were to evaluate the variation in geneticmorphology and genetic- physiology traits in order to improve the yield of sorghum plants

Summary

Introduction

Heritability is measure of the phenotypic variance attributable to genetic causes and has predictive function in plant breeding. Falconer and Mackay [7] reported that the most important function of heritability in genetic studies of quantitative traits is its predictive role to indicate the reliability of phenotypic value as guide to breeding value. Tadesse et al, [10] indicated that the most traits had relatively higher genotypic and phenotypic variance components and little difference between PCV and indicating their variation has a genetic origin can be exploited for further breeding programs. Individual and the combined analysis indicated that most traits had higher genotypic and phenotypic variance components than the environmental variance estimates, which is indicative that traits expression in this sorghum population was genetic and can be exploited in breeding programs [12]. Evaluation of components of variation and heritability for many traits will be facilitate improvement of crops, such as sorghum the Kareema Mohamad Wuhaib et al.: Genetic Parameters for Sorghum Varieties in Different Population Densities objectives were to evaluate the variation in geneticmorphology and genetic- physiology traits in order to improve the yield of sorghum plants

Methods

Results

Conclusion