Studies on the genetic components of variabilities for yield attributing and quality characters of some traditional rice varieties of Nalbari district of Assam

The experiment was initiated to assess the genotypic variabilities for yield attributing characters as well as certain quality characters in 28 traditional rice varieties of Nalbari district of Assam. Among these varieties, PCV was found to be higher than GCV for all the six characters studied. Number of fertile grains per panicle had maximum GCV followed by grain weight per plant. A moderate to high heritability estimates associated with moderate to high genetic advance was observed for grain weight per plant followed by plant height. Highest L/B ratio of grains was observed in the varieties Kharika Jaha (4.13) and Rupsundari (4.12) and lowest L/B ratio was observed in Koni Dhan (1.30). Amylose content of the varieties varied from 8.00% to 22.00%. Highest amylose (22.00%) was estimated for Bora Dhan and lowest 8.00% for Dhuchuri Sali. Different rice varieties were categorized on the basis of their gelatinization temperature in 7 score levels. Protein content of the varieties varied from 5.20% to 8.80%. Highest protein (8.80%) was estimated in Gopakhi Dhan and lowest (5.20%) in Dhuchuri Sali. On the basis of the nutritional value, 17 varieties were found to contain protein content below 7.00%.