A Comparative Study on Hybrid and Inbred Rice Grown in Aman Season

Abstract

This experiment was conducted at the experimental field of Sher-e-Bangla Agricultural University, Dhaka during the period from July to December, with a view to finding out the growth and yield performance of selected hybrid and inbred rice varieties in Aman season. There were seven treatments which comprised seven rice varieties viz. Gold-5, BRRI dhan56, BRRI dhan57, BRRI dhan62, Suborna-3, BRRI hybrid dhan4 and Moyna. The experiment layout was RCBD with three replications. Seedling of 25 days old was transplanted to the main field maintaining spacing with 25 cm X 15 cm. The plot size was 3X3m2. Collected data were analyzed with statistix10 software following the standard procedure and method. Significant variation was found among the selected inbred and hybrid rice varieties in respect of their different growth and yield characters. All the hybrid varieties contained higher amount of chlorophyll in their flag leaf at flowering to maturity compared to the inbred. BRRI hybrid dhan4 showed superiority over the hybrid and inbred varieties in different growth parameters. BRRI hybrid dhan4 also showed superiority in case of yield parameters such as panicles (14.27), filled grains panicle-1(168.43), 1000-grain weight (26.07 g), biological yield (13.33 t ha-1) and grain yield (6.13 t ha-1). Rest of the hybrid varieties viz. Shuborna 3 (5.60 t ha-1), Gold (5.15 t ha-1) and Moyna (4.86t ha-1) also provided higher grain yield compared to BRRI dhan56 (4.63 t ha-1) and BRRI dhan57 (4.25 t ha-1). Panicles hill-1, filled grains panicle-1 and 1000 grain weight mainly contributed to the higher grain yield of the hybrid varieties over the inbred.