*3.2. Analysis of Genetic and Phenotypic Variances*

In our study, the phenotypic variance for plant height, tillers per plant, grain yield per plant, and straw yield per plant were distributed into genotypic and environmental variances (Table 4). A low magnitude of genotypic coefficient of variation was found in the corresponding phenotypic coefficient of variation for all traits studied. The broad-sense heritability for four yield traits ranged from 75.3% (tillers per plant) to 98.7% (plant height), respectively. Accordingly, all the yield-related traits considered in our study showed high heritability (>60%), constituting a high breeding value with more additive genetic effects, which is important for rice grain yield enhancement.

**Table 4.** Estimation of genetic parameters in rice genotypes for yield and yield-related traits.


*Vg*; Genotypic variance, *Ve*; Environmental variance, *Vp*; Phenotypic variance, *h*<sup>2</sup> *<sup>B</sup>*; Broad sense heritability.
