Genotype × environment interaction for root yield in radish

Stability analysis helps in understanding the adaptability of genotypes over different environmental conditions and the identification of adaptable genotypes. The objective of the present study was to determine genotype × environment (GE) interaction and stability of radish genotypes and effect of different environments on root yield to understand its adaptation to varying environments. The study was conducted to assess yield stability across seasons in radish (Raphanus sativus L). Ten genotypes of radish were evaluated for fourteen characters under the Rabi, summer and Kharif seasons to study stability parameters. The genotype Kumbakonam local was stable for root yield in all seasons followed by Kanyakumari local 2 for leaf length, leaf area, root length, root diameter, fresh weight of the plant, root/leaf ratio and fresh weight of root per plant and had a linear response to season. The genotype Pusa Chetki had higher root yield during the Rabi season. Almost all characters were influenced by season except leaf width, root length, root diameter, fresh weight of leaves per plant, root/leaf ratio, dry weight of leaves per plant and plant fresh weight. The remaining traits had stability across seasons. Therefore the above said traits are important while exercising selection for different environments.