GENOTYPIC VARIATION IN MORPHO-PHYSIOLOGICAL TRAITS AND YIELD IN TRADITIONAL AROMATIC RICE CULTIVARS

Abstract

The experiment was conducted in the experimental field of Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka during the period of July to November 2017 to find out the genotypic variation in morpho-physiological traits and yield in traditional aromatic rice cultivars. Twelve traditional aromatic rice cultivars viz., Kalizira, Chiniatab (awned), Chiniatab (awnless), Kataribhog (awned), Kataribhog (awnless), Madhumala, Zirabhog, Shakhorkora, Badshabhog, BRRI dhan37, BRRI dhan38 and BRRI dhan50 were used as the treatment of this experiment. The experiment was laid out in a Randomized Complete Block Design (RCBD) with three replications. Data on different morpho-physiological traits and yield were recorded and statistically significant differences was observed for different cultivars. Plant height at 20, 40, 60 and 80 DAT and at harvest, the tallest plant (45.80 cm, 84.82, 128.64, 147.00 and 150.75 cm) was recorded from Shakhorkora and that was minimum (35.26, 72.19, 100.94, 104.54 and 107.19 cm) in BRRI dhan50, respectively. At 20, 40, 60 and 80 DAT, the maximum number of tillers hill -1 (5.07, 9.93, 13.87 and 14.53) was found in BRRI dhan50 and the minimum number (4.07, 7.07, 10.13 and 11.00) in Shakhorkora. The highest shoot reserve translocation (15.23%) was found from BRRI dhan50, whereas the lowest (11.03%) from Shakhorkora. The maximum number of effective tillers hill -1 (10.80) was found from BRRI dhan50, while the minimum number (8.33) from Shakhorkora. The longest panicle (25.97 cm) was recorded from BRRI dhan50, whereas the shortest (20.30 cm) from Shakhorkora. The maximum number of filled grains panicle -1 (181.60) was found in BRRI dhan50 and the minimum number (155.33) in Madhumala. The highest spikelet (9.77%) was recorded from BRRI dhan50, whereas the lowest (7.97%) from Shakhorkora. The highest weight of 1000 grains (15.92 g) was observed from BRRI dhan50 and the lowest weight (10.31 g) from Chiniatab (awned). The highest grain yield (4.73 t ha -1 ) was found from BRRI dhan50, whereas the lowest (1.86 t ha -1 ) from Shakhorkora. The highest straw yield (6.52 t ha -1 ) was recorded from BRRI dhan50, while the lowest (4.32 t ha -1 ) from Shakhorkora. BRRI dhan50 produced the highest number of tillers, the highest number of filled grains, longest panicle and highest weight of 1000 grains, and consequently provided the highest grain yield.