Stability analysis for dry matter production and yield components of coconut in two agroclimatic regions of india

Environmental factors influence productivity of the coconut palms and contribute to fluctuations in nut yield. Analysis of stability parameters assumes significance as it provides information about adaptability of a cultivar to a particular agro-climatic condition. Stability in dry matter production and yield characteristics of four cultivars of coconut (ECT, WCT, LCT, COD) growing at two agro-climatic regions were analysed. In general, dry matter production and yield components were higher in palms growing at eastern costal plains-hot sub humid region (Veppankulam) than at western ghats-hot sub humid per humid region (Kidu). At Kidu region, LCT exhibited stability in dry matter production, while WCT was stable in yield and yield components. At Veppankulam region, LCT produced relatively higher and stable dry matter and yield components indicating the adaptability of this cultivar to this agro-climatic region.