GROWTH, YIELD AND QUALITY PERFORMANCE OF TRASPLANTED AROMATIC AMAN RICE GENOTYPES

Abstract

A field experiment was conducted at the experimental farm of Sher-e-Bangla Agricultural University (SAU), Sher-e-Bangla Nagar, Dhaka during the period from July 2016 to December 2016 to study the growth, yield and quality of different Aman rice genotypes comparing with Kataribhog and BRRI dhan66 as check varieties in Aman season. The experiment comprised of 14 rice genotypes viz., (i) SAU ADL1, (ii) SAU ADL2, (iii) SAU ADL3, (iv) SAU ADL4, (v) SAU ADL5, (vi) SAU ADL6, (vii) SAU ADL7, (viii) SAU ADL8, (ix) SAU ADL9, (x) SAU ADL10, (xi) SAU ADL11, (xii) SAU ADL12, (xiii) Kataribhog, (xiv) BRRI dhan66. The experiment was laid out in a Randomized Complete Block Design (RCBD) with three replications of each treatment. All the genotypes varied significantly for all parameters. At harvest, the highest plant height (219.08 cm), tillers hill 1 (18.73), LAI (2.45) were recorded in SAU ADL10. The lowest plant height (101.00 cm) was in modern variety BRRI dhan66. The lowest number of tillers hill iii

-1 (6.53) was from SAU ADL12 and the lowest LAI (1.34) was found in SAU ADL7. Maximum SPAD value (47.29) was recorded from SAU ADL8 and minimum value (38.49) was in SAU ADL10. The highest effective tillers m -2 (446.72) was in SAU ADL10 and the lowest (142.24) in SAU ADL12. The highest panicle length (32.63 cm) was recorded in SAU ADL10 and the lowest (24.74) in BRRI dhan66. Again, SAU ADL12 needed the longest time for flowering (104.33 days) and maturity (139.67 days). On the other hand, BRRI dhan66 needed the shortest time (71.33 days) for flowering and maturity (106.67 days). Maximum filled grain (198.33 no.) was counted in SAU ADL2 and minimum (50.33 no.) was in SAU ADL7. SAU ADL7 showed the highest sterility percentage (72.56%) and the lowest grain yield (2.28 t ha -1 ) with the lowest harvest index (HI) (17.31%) where SAU ADL2 showed the highest Harvest Index (HI) (47.63%). Sterility percentage was the lowest (7.03%) in BRRI dhan66 with the highest grain yield (5.24 t ha -1 ). SAU ADL5, SAU ADL2, SAU ADL9, SAU ADL3 provided maximum grain yield which was statistically similar to modern variety BRRI dhan66 and almost 69% higher than Kataribhog. SAU ADL10 and SAU ADL11 also gave almost 19 to 28% higher yield than Kataribhog. The highest hulling percentage and milling percentage was in Kataribhog. The highest Head Rice Recovery (HRR) was recorded from BRRI dhan66. Presence of aroma was recorded in SAU ADL3, SAU ADL5, SAU ADL7, SAU ADL9, SAU ADL10, SAU ADL11 and SAU ADL12 with grain length>6.50 mm, L/B ratio >2.7, higher protein% (8.4%-10.6%), higher Kernel Length After Cooking (KLAC) (8-9.98 mm), elongation ratio (1.29-1.47) over Kataribhog. Kataribhog needed the lowest time for cooking (14.75 min) over local aromatic genotypes. As such, short stature aromatic genotype SAU ADL11, high yielding aromatic genotype SAU ADL5, SAU ADL9, SAU ADL3, SAU ADL10, highest protein containing SAU ADL7 were found promising.