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Performance of Hybrid and Inbred Rice Genotypes at Two Different Locations of Bangladesh During Dry Season

MD. SIRAJUL ISLAM, PhD
Program Head, Agriculture and Food Security Program
BRAC Centre, 75 Mohakhali, Dhaka 1212, Bangladesh

Abstract/ Executive Summary:

Bangladesh is an extremely land scarce country. Any improvement of rice yield has significant impact on the overall food security of the country. Hybrid rice is one of the viable and proven technologies that have been considered as a new frontier to increase rice production. Performance of two new exotic hybrid rice genotypes from India BIO-404 and BIO-452 including two popular BRAC hybrid (Alloran and Sathi) and one inbred (BRRI dhan28) were evaluated at BRAC Agricultural Research and Development Centre of Gazipur and also in the farmer’s field of Rajshahi district during dry season (boro) of 2011. Both the exotic BIO genotypes showed a better cold tolerance at the seedling stage. The initial growth of BIO-404 and BIO-452 were better compared to other tested genotypes. But at the later stage they showed a higher plant height and lower panicle number resulting in lower grain yield than the check hybrids. The spikelet fertility of the two exotic hybrid rice genotypes was also low. Hybrid Alloran produced the highest grain yield in both the locations which was attributed to higher spikelet fertility and higher individual grain weight.

Keywords: Hybrid rice, Grain yield, Spikelet fertility

Location: BRAC Agricultural Research and Development Centre (BARDC) Gazipur and a field of Paba Upazila of Rajshahi district

Start Date: 01-10-2011

End Date: 31-03-2011

Program Area: Variety and Species

Commodity: Rice

Objectives:

The main focus of the present study is to generate primary data from two different regions to study the performance of two new exotic hybrid rice genotypes BIO-404 and BIO-452. The study also focuses on the farmers' perception about the hybrid rice.

Methodology:

An experiment was conducted to study the performance of two new exotic hybrid rice genotypes BIO-404 and BIO-452 including two hybrid (Alloran and Sathi) and one inbred (BRRI dhan28) checks. The experiment was laid out in Randomized Complete Block Design with three replications. The treatments were randomly distributed to the plot in each block. There were (5×3) or 15 unit plots whereas the unit plots size were (4m x 2m) or 8m².The plot to plot distances was 0.4 m and block to block distance was 0.8 m. During the grain period of the crops all necessary cares (application of fertilizers, pesticides, irrigation, weeding etc.) were done to ensuring and maintaining the normal growth and development of the crop. Ten hills were selected at random from each plot and total number of tillers at each of 20, 40 and 60 DAT and also at 50% flowering and harvesting were measured and averaged. 1 m² area was selected from each plot and total number of tiller m-² at each of 20 40 and 60 DAT; and also at 50% flowering and harvesting were measured and averaged. Plant height was measured from the ground level to the top of the panicle from plants of 10 hills in each plot and averaged. 1 m² area was selected from each plot and number of panicle was measured and averaged. Panicle lengths were measured from 10 selected panicles, recorded in cm and averaged. Twenty panicles were selected and the filled and unfilled grains panicle-1 were counted and averaged. 1000 grain weights were calculated from 3 unit samples of each plot and averaged. 8 m² of each plot was harvested and yield was converted to ton ha-1 at 14% moisture content.

Source of Information: http://www.bioscience-associates.com/2013/12/3-performance-of-hybrid-and-inbred-rice.html

Article Link (Online Journal):

Funding Source:

1. Department for International Development (DFID)	Budget:
2.	Budget:

Total Budget (Tk.) :

Achievement/Findings:

The hybrid rice variety Alloran had lower plant height in both locations among the tested genotypes. Tiller dynamics were also good in both locations. The variety also gave the highest yield in both Gazipur and Rajshahi which was attributed to higher spikelet fertility and individual grain weights. So considering all these results, Alloran could be one of the suitable hybrid varieties during rabi season to increase rice production and ensure food security.

Knowledge Management: Online Circulation