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Evaluation of Experimental Hybrids During Boro 2007-08 Seasons

Dr. Md. Jamil Hasan
Principal Scientific Officer
Head Hybrid Rice Division Bangladesh Rice Research Institute Gazipur-1701

Umma Kulsum
Scientific Officer
Hybrid Rice Division Bangladesh Rice Research Institute Gazipur-1701

Abstract/ Executive Summary:

Evaluation of experiment hybrids for Boro season was made with a view to select promising hybrids under dry condition. Normally hybrids are performing well under irrigated dry season or Boro season. We need hybrid rice variety having yield potentiality above 9 t /ha with a growth duration with 140 days. So, this experiment is very important to select such potential hybrids. 16 hybrid combinations were selected that showed yield advantage over check varieties ranged from 2.01 to 4.80 t/ha. This selected combinations will be tested for commercial seed production feasibility before further advancement

Keywords: Experimental hybrids, Boro, Yield potential

Location: BRRI HQ, Gazipur

Start Date: 05-12-2007

End Date: 31-05-2008

Program Area: Variety and Species

Commodity: Rice

Objectives:

Selection of promising hybrids based on yield, duration and grain type

Methodology:

One hundred forty (140) hybrids were evaluated along with 3 checks (BRRI hybrid dhan1, BRRI dhan28, BRRI dhan29). Thirty days old seedlings were transplanted in 2m² area plot following augmented in RCB design using single seedling/hill with the spacing of 20 cm x 15 cm. Fertilizers @ 270:130:120:70:10 kg/ha of Urea- TSP-MP- Gypsum- Zn SO₄_,respectively were applied. The experiment was conducted with augmented design. Total urea was applied in four installments. 1/4 th at final land preparation, 1/4 th at 15-20 days after transplanting,1/4 th at 35-40 days after transplanting and the rest before panicle initiation (PI) stage. The following data were collected- plant height (cm), no. of effective tillers, days to first flowering, days to 50% flowering, spikelet fertility (%), days to maturity and plot yield. Standard heterosis was measured following the formula;- F₁-check/check x 100

Source of Information: BRRI Annual Report 2007-2008, page no. 22, BRRI, Gazipur-1701, Bangladesh

Article Link (Online Journal):

Funding Source:

1. Government

Budget: 20000/-

Total Budget (Tk.) : 20000/-

Achievement/Findings:

Among the tested entries, sixteen (16) combinations were selected considering yield advantages of 1(one) or more than 1t/ha over the checks. However, all the selected hybrids produced yield advantage ranged from 2.01 to 4.80 t/ha.

Knowledge Management: Report/Proceedings