Phenotypic evaluation reveals key yield-attributing traits and ideal lines in 45 sesame genotypes, highlighting reliable targets for multi-trait breeding programs.
Key Points
To evaluate 45 sesame genotypes across 14 yield and yield-attributing traits using genotype by trait (GT) biplot analysis to identify ideal genotypes and key selection criteria.
Evaluated 45 sesame (Sesamum indicum) genotypes across 14 yield and yield-attributing traits during the Rabi 2025–26 season.
Applied genotype by trait (GT) biplot analysis via principal component analysis to assess trait associations, sector-specific genotype performance, and trait discriminativeness.
The first two principal components explained 42.97% of total variation (PC1 = 24.52%, PC2 = 18.45%), separating genotypes into nine distinct sectors.
Seed yield per plant exhibited significant positive associations with harvest index, 1000-seed weight, primary and secondary branches, capsule count, capsule length, and SCMR.
TPTS-45 was identified as the ideal genotype, while seed yield per plant, capsule number per plant, branch counts, and plant height proved to be the most discriminative and representative traits.