GENOTYPIC VARIATION IN MORPHO-PHYSIOLOGICAL CHARACTERS AND YIELD IN MODERN AMAN RICE VARIETIES

Abstract

The study was conducted at the Experimental Farm of Sher-e-Bangla Agricultural University (SAU), Sher-e-Bangla Nagar. Dhaka-1207 during the June 2018 to December 2018 to have a comparative study on ten modern rice varieties in Aman season in relation to their growth behavior, leaf chlorophyll content and yield. The experiment consisted of 10 Aman rice varieties namely, BRRI dhan40, BRRI dhan41, BRRI dhan44, BRRI dhan46, BRRI dhan53, BRRI dhan71, BRRI dhan75, BRRI dhan80, BRRI dhan87 and BRRI dhan90. The experimental plots were laid out in randomized complete block design (RCBD) with three replications. Ten (10) genotypes were distributed to each plot of 4 m x 2.5 m size within each block randomly. The highest no. of filled grain per hill was obtained from the verity BRRI dhan80 and the lowest no. of filled grain per hill from BRRI dhan53. The highest no. of unfilled grain per hill was obtained from the verity BRRI dhan71 and the lowest no. of unfilled grain per hill from BRRI dhan87. The maximum days to maturity (134.25) were recorded from BRRI dhan44, while the minimum days to maturity (100.50) was recorded from BRRI dhan41. The maximum number effective tiller hill -1 (16.75) was recorded from BRRI dhan53, whereas the minimum number of effective tillers hill -1 (12.05) was recorded from BRRI dhan44. The maximum number of filled grains panicle -1 (89.90) were recorded from BRRI dhan53, whereas the minimum number of filled grains panicle (75.80) was recorded from BRRI dhan44. The highest weight of 1000-grains (25.71 g) was recorded from BRRI dhan53, while the lowest weight of 1000-grains (19.45 g) was obtained from BRRI dhan75. The highest grain yield (5.45 t ha ) was recorded from BRRI dhan53, whereas the lowest grain yield (3.49 t ha ) was provided by from BRRI dhan44. The highest straw yield (7.97 t ha ) was recorded from BRRI dhan53, whereas the lowest straw yield (6.58 t ha ) was given by BRRI dhan44. So, BRRI dhan53 was superior for Aman season in consideration of yield attributes and yield. -1 -1 -1 -1 -1