A COMPARATIVE STUDY ON HYBRID AND INBRED RICE GROWN IN AMAN SEASON

Abstract

A field experiment was conducted with four hybrids (Gold, Moyna, Shuborna 3 and BRRI hybriddhan 4) and three inbred rice varieties (BRRIdhan 56, BRRI dhan 57 and BRRIdhan 62) in the Research Farm of Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka, with a view to evaluating their performances. The experiment was laid out in Randomized Complete Block Design with three replications. Significant variation was found among the selected inbred and hybrid rice varieties in respect of their different growth and yield characters. Among the seven rice varieties, inbred BRRIdhan 62 was found inferior considering above characters. All the hybrid varieties contained higher amount of chlorophyll in their flag leaf at flowering to maturity compared to the inbred. BRRI hybriddhan 4 exhibited superiority over the rest hybrid and inbred varieties in different growth parameters like plant height, tillers hill-1, leaves hill-1, total dry matter hill-1, leaf area hill-1, leaf area index, crop growth rate and panicle length. BRRI hybriddhan 4 also showed superiority in case of yield parameters such as panicles hill-1(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 (4.86 t ha-1) also provided higher grain yield compared to BRRIdhan 56 (4.63 t ha-1) and BRRIdhan 57 (4.25 tha-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.