Genotypic, Phenotypic coefficient of Variation and Heritability and Path coefficient Analysis for Growth and Yield Contributing Parameters in Floribunda Rose

Author: Vijayalaxmi G.P., Seetaramu G.K., Imamsaheb S.J.* and Ganeshgouda Patil

Download PDF

Abstract

In India even though a large number of rose varieties are developed but estimation of the phylogenetic relationship and knowing the genetic diversity between genotypes in germplasm of any species is essential as it provides useful traits for further genetic development and increase selection efficiency. Genetic diversity in plant varieties can be estimated by observing the phenotypes of the plants and measuring the morphological characters which in turn lay foundation for breeding programs. Hence the present study on Genotypic, Phenotypic Coefficient of variation and heritability and Path coefficient analysis for growth and yield contributing parameters in floribunda rose. For several yield-attributing variables, correlation and path analyses were carried out for 11 distinct floribunda rose genotypes. To distinguish the role that each component played in the ultimate flower yield, there are a total of twelve separate parameters. The findings showed that for the characters under study, the genotypic correlations were higher than the phenotypic correlations, showing the traits' strong heritability. The range of phenotypic coefficient of variation was 9.51% (flower length at 285 DAP) to 22.341%. (Number of petals per flower). Genotypic coefficient of variation ranged from 6.95 per cent (flower length at 285 DAP) to 21.23 per cent (flower length at 285 DAP). The estimates of heritability ranged from 46.60 (No. of branches 225 DAP) to 92.50 per cent (Plant spread at 345 DAP). Genetic advance expressed as percentage over mean ranged from 10.46 (flower length at 285 DAP) to 41.57 per cent (Number of petals per flower). The genotypic correlation of flower yield per plant showed highly significant and positive correlation with number of flower per plant (0.859) number of flower per bunch at 225DAP (0.836), number of flower per bunch at 285DAP (0.933), number of flower per bunch at 345DAP (0.759), plant height at 345DAP (0.693), number of branches per plant at 345DAP (0.953), flower length at 345DAP (0.872) and flower diameter at 345DAP (0.860). Since these associations are in desirable direction and selection of these traits may ultimately improve the yield. The path coefficient results showed that at the genotypic level, the number of flowers per bunch at 285 DAP (0.337), the diameter of the flower at 345 DAP (0.087), the length of the flower at 285 DAP (0.364), the spread of the plant at 345 DAP (0.537), the number of branches at 285 DAP (0.049), and the plant height at 225 DAP (0.122) all exhibited the maximum positively direct effect on flower yield per plant.

Keywords

Floribunda rose, Genotypic, Phenotypic Coefficient of variation and Heritability

Conclusion

From the present investigation, among all traits studied, stronger genotypic correlations, demonstrating the substantial heritability of the features. The genotypic correlation between flower yield per plant and the number of flowers per plant, the number of flowers per bunch at 225DAP, the number of flowers per bunch at 285DAP , the number of flowers per bunch at 345DAP. The highest heritability coupled with high GAM was observed for flower yield per plant, At the genotypic level, flower yield per plant was most positively influenced directly by the number of flowers per bunch at 285 DAP, flower diameter at 345 DAP, flower length at 285 DAP, plant spread at 345 DAP, number of branches at 285 DAP, and plant height at 225 DAP.

References

-

How to cite this article

Vijayalaxmi G.P., Seetaramu G.K., Imamsaheb S.J. and Ganeshgouda Patil (2022). Genotypic, Phenotypic coefficient of Variation and Heritability and Path coefficient Analysis for Growth and Yield Contributing Parameters in Floribunda Rose. Biological Forum – An International Journal, 14(4): 634-640.