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Effect of Ga3 and Row Ratio of Restorer (r) and Cms Lines (a) on Different Characters and Hybrid Seed Production

Md.Hafizar. Rahman
Scientific Officer
Hybrid Rice Division Bangladesh Rice Research Institute Gazipur-1701

M. M. Khatun
Scientific Officer
Pomology Division, HRC Bangladesh Agriculture Research Institute Gazipur

Md. S. R.Khan
Project Monitoring Officer
Tuber Crop Development Project DAE, Khamarbari, Dhaka

M. A. K. Mian
Professor
Genetics and Plant Breeding Division BSMRAU, Salna, Gazipur

Golm Rasul.
Professor
Genetics and Plant Breeding Division BSMRAU, Salna, Gazipur

Abstract/ Executive Summary:

An experiment was conducted out at the experimental farm of Bangladesh Rice Research Institute (BRRI), Gazipur, during November to May 2009-10 to study the effect of GA₃ and row ratio of restorer and CMS lines on different characters and F₁ seed production of BRRI hybrid dhan2 . The treatments were of four levels of GA₃ viz. (i) control, (ii) 150 g ha^-1, (iii) 250 g ha^-1 and (iv) 350 g ha^-1 and five row ratios (R:A) viz. (i) 2:8, (ii) 2:10, (iii) 2:12, (iv) 2:14 and (v) 2:16. The highest F₁seed yield (2.34 t ha^-1) of BRRI hybrid dhan2 was obtained with an application of GA₃ @ 250 g ha^-1 which enhanced the maximum number of effective tillers, the highest number of grains panicle^-1, panicle exsertion rate and out crossing rate. The lowest seed yield (1.10 t ha^-1) was produced without application of GA₃ i.e. control. The row ratio of 2:12 and 2:8 produced the highest (2.05 t ha^-1) and the lowest (1.63 t ha^-1) F₁seed yield, respectively. The interaction between GA₃ and row ratio of restorer and CMS lines was significant for F₁seed yield.

Keywords: GA3, Row ratio, Out crossing rate, Yield, Hybrid seed production.

Location: BRRI Gazipur

Start Date: 00-00-2009

End Date: 00-00-2010

Program Area: Variety and Species

Commodity: Rice

Objectives:

To assess the performance of BRRI hybrid dhan2 for production of F₁ seed and related characters upon applications of GA₃ at different concentration and the proper row ratio of restorer and CMS lines.

Methodology:

This study was undertaken at BRRI Gazipur in Boro season during November to May 2009-10. The restorer line (R) BRRI10R and CMS line (A) BRRI10A developed by the Bangladesh rice research institute (BRRI), have been used as parent material in the experiment. The line BRRI10R and BRRI10A matures after 150 days and 147 days, respectively. Number of rows for different treatments was different such as 2:8, 2:10 2:12, 2:14 and 2:16. To accommodate varying number of rows, plot size was also varied accordingly. Row directions were perpendicular to wind direction. To ensure easy dispersal of pollen and higher cross pollination of panicles of CMS plant, flag leaf clipping is very important.

Source of Information: Bangladesh J. Agril. Res. 37(4) : 665-676,December-2012.

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The highest F₁seed yield (2.34 t ha^-1) of BRRI hybrid dhan2 was obtained with an application of GA₃ @ 250 g ha^-1 which enhanced the maximum number of effective tillers, the highest number of grains panicle^-1, panicle exsertion rate and out crossing rate.

Knowledge Management: Journal