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Evaluation of Growth and Yield of Selected Hybrid and Inbred Rice Varieties Grown in Net-house During Transplanted Aman Season

ISLAM, M . SH
Senior Scientific Officer
Agronomy Division, BRRI

M.S.U. BHUIYA
Professor
Deptt of Agronomy, BAU

A.R. GOMOSTA
Former Director (Res.)
BRRI

A.R. SARKAR
Professor
Deptt of Agronomy, BAU

M.M. HUSSAIN
Ccief Scientific Officer
ARD, BRRI

Abstract/ Executive Summary:

Pot experiments were conducted during T. aman 2001 and 2002 (wet season) at Bangladesh Rice Research Institute in net house. Hybrid variety Sonarbangla-1 and inbred modem variety BRRI dhan31 were used in both the seasons and BRRI hybrid dhan-1 was used in 2002. In 2001 , BRRI dhan31 had about 10-15% higher plant height, very similar tillers/plant, 15-25% higher leaf area at all days after transplanting compared to Sonarbangla-1. Sonarbangla- 1 had about 40% higher dry matter production at 25 DAT but had very similar dry matter production at 50 and 75 DAT, 4-11% higher rooting depth at all DATs, about 22% higher root dry weight at 25 DAT, but 5-l 0% lower root dry weight at 50 and 75 DAT compared to BRRI dhan31. The photosynthetic rate was higher (20 f.l mol m^-2sec^{- 1}) in BRRI dhan31 at 35 DAT(maximum tillering stage) but at 65 DAT, Sonarbangla-1 had higher photosynthetic rate of 19.5,µ.l mol m^-2sec^-1. BRRI dhan-31 had higher panicles/plant than Sonarbangla-1, but Sonarbangla-1 had higher number of grains/panicle, 1000-grain weight and grain yield than BRRI dhan 31. In 2002, BRRI dhan31 had the highest plant height at 25 DAT, but. at 75 DAT, BRRI hybrid dhan-1 had the highest plant height. Sonarbangla-1 had the largest leaf area at 25 and 50 DAT followed by BRRI dhan31, but at 75 DAT, BRRI dhan31 had the largest leaf area. The highest shoot dry matter was observed in BRRI dhan31 followed by Sonarbangla-1 at all DATs. Sonarbangla-1 had the highest rooting depth and root dry weight at all DATs. BRRl dhan-31 gave the highest number of panicles/plant followed by Sonarbangla-I, BRRI hybrid dhan1 had the highest grains/panicle followed by BRRI dhan31 and Sonarbangla-I had the highest I000-grain weight followed by BRRI dhan31. The highest amount of grains/plant (34.6 g) was obtained from BRRI dhan31 .

Keywords: Shoot dry matter, Root dry weight, Leaf area, Photosynthesis, Grain yield

Location: Bangladesh Rice Research Institute

Start Date: 00-00-2001

End Date: 00-00-2002

Program Area: Crop-Soil-Water Management

Commodity: Rice

Objectives:

To evaluate the growth and yield behaviour of a few selected hybrid and inbred rice varieties in wet season under controlled condition.

Methodology:

The experiment was conducted using a completely randomized design with 3 replications, where varieties were considered as treatments. The 2 hybrid rice varieties were Sonarbangla-1 and BRRI hybrid dhan-1 (only in 2002) and an inbred rice BRRI dhan31. A total of 28 earthen pots in 2001 and 42 in 2002 were taken with about I2 kg muddy soil in each pot. Considering the weight of top-soil (0-15 cm) of the field (6 x I 05 kg/ha), the pots with 10 kg soil were fertilized@ 100-26.4-41.5-105 kg N, P, K, S and Zn/ha, respectively. Single 30-day old healthy seedling was transplanted in the middle of each pot. The growth parameters e.g., plant height, tillers/plant, leaf area, rooting depth, shoot and root dry matter were measured from destructive samples. To compare the photosynthetic rate of hybrid (Sonarbangla-1) and inbred (BRRI dhan31) rice varieties, their photosynthetic efficiency was measured in 2001 with a portable photosynthesis-measuring instrument. The SPAD reading of the varieties was also recorded at the same time.

Source of Information: Bangladesh J . Agril. Res. 34(1): 67-73, March 2009

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

BRRI dhan31 had about 10-15% higher plant height, very similar tillers/plant, 15-25% higher leaf area at all days after transplanting compared to Sonarbangla-1. Sonarbangla- 1 had about 40% higher dry matter production at 25 DAT but had very similar dry matter production at 50 and 75 DAT, 4-11% higher rooting depth at all DATs, about 22% higher root dry weight at 25 DAT, but 5-l 0% lower root dry weight at 50 and 75 DAT compared to BRRI dhan31. The photosynthetic rate was higher (20 f.l mol m-2sec- 1) in BRRI dhan31 at 35 DAT(maximum tillering stage) but at 65 DAT, Sonarbangla-1 had higher photosynthetic rate of 19.5,µ.l mol m-2 sec-1. BRRI dhan31 had higher panicles/plant than Sonarbangla-1, but Sonarbangla-1 had higher number of grains/panicle, 1000-grain weight and grain yield than BRRI dhan31. In 2002, BRRI dhan31 had the highest plant height at 25 DAT, but. at 75 DAT, BRRI hybrid dhan-1 had the highest plant height. Sonarbangla-1 had the largest leaf area at 25 and 50 DAT followed by BRRI dhan-31, but at 75 DAT, BRRI dhan-31 had the largest leaf area. The highest shoot dry matter was observed in BRRI dhan-31 followed by Sonarbangla-1 at all DATs. Sonarbangla-1 had the highest rooting depth and root dry weight at all DATs. BRRl dhan31 gave the highest number of panicles/plant followed by Sonarbangla-I, BRRI hybrid dhan1 had the highest grains/panicle followed by BRRI dhan31 and Sonarbangla-I had the highest I000-grain weight followed by BRRI dhan31. The highest amount of grains/plant (34.6 g) was obtained from BRRI dhan31 Poor grain yield of hybrid rice is mainly caused by high pest infestation and grain sterility in T. aman (wet) season.

Knowledge Management: Journal