Assessment of adaptability of recently released salt tolerant rice varieties in coastal regions of South Bangladesh

Productivity of rice is adversely affected by salinity and water logging stresses in coastal zones, and affected areas are progressively expanding as consequences of climate change and overexploitation of natural resources to meet the needs of increasing populations. Several varieties were developed and commercialized in this region in recent years, including some salt and stagnant flood (SF, medium deep, 25–50cm water depth) tolerant varieties. However, suitability of these varieties based on adaptation to local conditions across the region and farmers’ preferences have not been sufficiently evaluated. Genotype by environment analysis leads to identification of varieties with stable performance, or suitability to specific regions. Two frequently used statistical analyses are additive main effects and multiplicative interaction (AMMI); and the genotype main…