Stability analysis for essential oil yield and quality traits in Japanese mint

Crop varieties are known to differ genetically for their adaptation reactions across the environments. An ideal variety must show yield and stability of performance. The regression analysis (Finlay and Wilkinson, 6; Eberhart and Russell, 5; Breese, 2) is often used for the analysis of genotype × environment interaction. The objective of the present study was to investigate the changes of adaptation reaction of different cultivars of the major aromatic crop Japanese mint/corn mint (Mentha arvensis L.; major source of menthol) in two contrasting environments of two places: Lucknow (a semi-arid sub-tropical plain) and Pantnagar (a humid sub-tropical foot-hill area) and to select a better corn mint cultivar for the two places. The results obtained from the study are reported in this paper. The material for the present study comprised eight