Stability Adaptability Trial and Yield Performance of Newly Developed Hybrid Rice (Oriza Sativa) varieties

The experiment was done in the Boro season (December-April) at the Supreme Rice Research Centre (SRRC) with the supervision of the USAID Project, Feed The Future, with the help of the United States of America and with technical assistance of the International Rice Research Institute (IRRI). IRRI provided six different types of hybrids of rice to the SRRC to carry out a multi-location trial with the aim of examining their adaptation and yielding performance under favourable climatic conditions. Biri Dhan -87 was also sown as a check variety in order to compare with the newly released cultivars and the same was being done in other regions of Bangladesh. A randomized complete block design (RCBD) that had three replications was used at SRRC. Seedlings of 25 days old were transplanted at a rate of one seedling per hill with a spacing of 20 cm x 15cm.

The morphophysiological data was recorded on the height of the plant, number of tillers per plant, panicle height and panicle number, thousand -kernel weight, grain length and width, yield, and disease incidence. Along with that, in the plant height, panicle length, spikelet fertility, grain type, thousand-kernel weight, yield at a moisture of 14% and number of effective tillers were also measured during the study. BHR-501, BHR-502, BHR-503, BHR-504, BHR-505 and BHR-506 were the six hybrid lines under investigation. BHR-506 gave the highest yield, then BHR-501, BHR-502, BHR-503, BHR-504, and BHR-505, respectively.