Delineating photosynthesis, essential oil yield performance, and their component traits under genotype × traits × environments interactions in Ocimum genotypes

Abstract

The stability parameters were quantified through a study in the thirteen economic traits in fourteen genotypes of Ocimum. The essential oil yields of the Ocimum in different environments are influenced by economic traits that are affected by genotype × environment interactions. The genotype × environment interaction analysis in Ocimum is scanty for the essential oil yield. This experiment was planned to judge the consequences of genotype × environment interaction on the key characters in Ocimum to select in diverse environments. The fourteen Ocimum genotypes were assessed in three years: 2016-2017, 2017-2018, and 2018-2019 in the Kharif season. Subsequently, the Eberhart and Russell and GGE biplot models were used to carry out genotype × environment interactions for stability. This endeavor's objectives were to predict the Ocimum lines and interspecific hybrids performance across the year's and stable lines selection. The results depicted a significant G × E interaction effect on all traits (p<0.05) except the transpiration rate. Both GGE biplot and Eberhart and Russell models identified traits in high efficiency among genotypes across-environments for stability. The GGE biplot and Eberhart and Russell models helped select genotypes correlated with desired characters' over-environments. Based on both stability models and the mean performance of high oil yield, the two stable genotypes, namely O-9, O-10 for high essential oil yield, O-3, O-4, and O-10 for the photosynthesis rate selected for further exploitation.