Performance of Selective Indigenous Rice Landraces in Rain Fed Agro Ecological System of Indian Sundarbans

Abstract

Fifty indigenous rice land races which have largely been decimated in post green revolution India have been subjected to plot experiments in widely separated 10 sq m plots by maintaining 16 No/hills/sq m spacing in post Amphan and Yaas affected Sundarbans. Selective agronomic characters are recorded at various phases of growth of the rice plants. Yield from the individual plots and yield potentials were noted. Yield and yield potential study showed that at least 12 land races have the yield potential of 10 t/ha. Tallest varieties have the highest yield and highest submergence tolerance. Plot yield has found to be strong positive correlation with no of replanted plants. Significant negative correlation between 1000 g weight of grains, number of effective tillers and L:W ratio of the rice grains reflects nutrition mobility inconsistency. The significant positive correlation between flowering days and yield is a reflection of animal depredation. Multiple Regression Analysis has revealed that only No of Seedling and effective number of tiller has significant impact on yield amount. Agglomerative hierarchical clustering (AHC) revealed two distinct clusters among the fifty (50) land race varieties studied. The result can be extremely beneficial for crop contingency planning for the climate vulnerable marginal communities.