PERFORMANCE OF BREEDER SEEDS FOR THE PRODUCTION OF FOUNDATION SEEDS IN RICE AT DIFFERENT LOCATIONS OF DINAJPUR

Abstract

The experiment was conducted at the experiment field during the period from December2011 to June 2012 to evaluate the performance of breeder seeds for the production of foundation seeds in rice at different locations in the district of Dinajpur. Variability, heritability, co-heritability, genetic advance, simple correlation coefficient and path coefficient analysis were studied for grain yield and other yield contributing characters (i.e. plant height, number of tiller per hill, effective tiller per hill, panicle length, grain per panicle, 50% flowering days, 1000 grain weight, sterility, and yield per plant) in four varieties of rice (Oryza sativa L.). There were significant differences observed among all the traits studied. The highest genotypic coefficient of variation was observed for sterility (28.58) and the lowest value was observed in grain per panicle (6.94). 50% flowering days (99.43) showed high heritability and grain per panicle (73.65) showed low heritability. Genetic advance in percentage of mean was high for sterility (60.43) and low for grain per panicle (16.30). A remarkable variation in plant characters and yield performance was noticed among the rice varieties. The genotype of BRRI-29 gave the highest grain yield (5.47 t/ha) while BRRI-50 produce the minimum (4.25 t/ha). Grain per panicle showed genotypically and phenotypically positive and significant correlation with the yield per plant. The trait 1000 grain weight showed positive and significant correlation with the yield per plant. The results of path coefficient analysis revealed that grain per panicle had the high direct effect on yield per plant and it had significant relation on grain yield. In contrast panicle length genotypically and phenotypically had significant relation on yield but it had negative direct effect. Based on overall performances, the genotypes BRRI-29 and seemed to better than other varieties and particularly some were outstanding against grain yield per plant.