Genetic variability, diversity and principal component analysis in B and R lines of rabi sorghum [Sorghum bicolor (L.) Moench]

DOI:10.37992/2024.1503.086

  • K. O. Swaroop,
  • G. M. Sajjanar,
  • S. P. Sneha,
  • C. D. Soregaon and,
  • B. O. Kiran

Abstract

Hybrid technology is exploited in kharif (rainy) sorghum while the same is not the scenario in Rabi sorghum  which is still dominated by landraces and varieties which have poor yield potentiality. Considering the necessity of development of heterotic hybrids, an attempt was made to screen hybrid parents (B and R lines) to assess variability and genetic diversity, for productivity traits. The study was conducted with 32 B and R lines at Regional Agricultural Research Station, Vijayapur during 2021-22. PCV was observed to surpass GCV across all traits. The traits grain yield per plant, fodder yield per plant, grain number per plant, and harvest index exhibited notably high PCV and GCV. Plant height, panicle length, panicle harvest index, and harvest index recorded high heritability and genetic advance, suggesting their control by additive gene action and potential for improvement via selection. Cluster analysis classified the 32 genotypes into four groups. PCA condensed 14 traits into five principal components, capturing 81.50% of total variation. The genotypes remained scattered in all four quadrants in PCA- Biplot, showing large genetic variability in quantitative traits studied.

Keywords: Genetic variability, heritability, diversity, clusters, PCA and rabi sorghum

Published
04-10-2024
How to Cite
K. O. Swaroop, G. M. Sajjanar, S. P. Sneha, C. D. Soregaon and, B. O. Kiran

Genetic variability, diversity and principal component analysis in B and R lines of rabi sorghum [Sorghum bicolor L. Moench]

. 2024. Electronic Journal of Plant Breeding, 15 3, 708-713. Retrieved from https://www.ejplantbreeding.org/index.php/EJPB/article/view/5134
Section
Research Note