PERFORMANCE OF FIVE SELECTED HYBRID RICE VARIETIES IN BORO SEASON

Abstract

The experiment was carried out at the research farm of the Sher-e-Bangla Agricultural University (SAU), Dhalca- 1207, during December 2011 to May 2012 to evaluate the performance of five hybrid rice varieties namely Moyna, Sonarbangla-3, IIeera4, Jagoron and Panna-!. The experiment was laid out in Randomized Complete Block design with four replications. Inbred BRRI dhan45 was used as a check variety. Growth characters yield and yield attributes were significantly different among the studied varieties. All the studied hybrid varieties exhibited superiority in respect of growth characters viz, tillers hill", leaves hilt'. TDM hilr1, leaf area hill", LA!, CUR, RGR and NAR over the inbred BRRI dhan45. Additionally, these hybrids also showed better performance in yield related characters viz, effective tillers hill", paniele length, 1000-grain weight, biological yield, harvest index (HI) over the same inbred. Consequently, the tested hybrid varieties produced the higher grain yield compared to BRRI dhan45. Higher grain yield of the tested hybrids also related with higher dry matter production and partitioning. However, Heera4 showed the best performance closely followed by Moyna. The hybrid varieties Heera-4 and Moyna had maximum CUR. RGR and NAR particularly in the reproductive stage (90 DAT) possibly for high sink demand and thus, these two varieties produced 43.5% higher yield over the inbred BRRI dhan45. Yield components, effective tillers hill" and 1000 grain weight mainly contributed to the higher grain yield of hybrid varieties over the inbred BRRI dhan-45. These results suggested that the tested hybrid rice varieties had yield advantage over the inbred BRRI dhan45 due to production and partitioning of more dry matter to the grain.