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Determination of Suitable Chemical Combination with Ga3 on Hybrid Rice Seed Production of Promising Hybrids

Md. Kamal Hossain
Senior Scientific Officer
Hybrid Rice Division Bangladesh Rice Research Institute Gazipur-1701

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

Abstract/ Executive Summary:

Suitable chemical combination with GA₃ on hybrid rice seed production is very essential because GA₃ is very costly and not available locally. Appropriate chemical combination can mitigate the cost involvement in hybrid rice seed production and similarly effective for CMS line panicle exertion, plant height adjustment and enhancement of stigma receptivity of female lines. Alternative chemical combination with GA₃ that is readily available could be cost effective for hybrid rice seed production. With this view, this experiment was conducted

Keywords: GA3, Chemical combination, Seed yield

Location: BRRI HQ, Gazipur

Start Date: 11-07-2006

End Date: 31-10-2006

Program Area: Variety and Species

Commodity: Rice

Objectives:

To find out the appropriate alternative chemicals of GA3 with proper dose and time of application.

Methodology:

One CMS line (BRRI1A) along with its restorer (BR827R) of BRRI hybrid dhan1 were grown as parental materials. Restorer was sown in three different date at five days interval and CMS line was sown along with second set of its respective R line. After ten days fertilizers @ 7 gm, 4 gm and 7 gm urea, TSP and MP, respectively in 1 m² area of seed bed. Twenty-one days old seedlings were be transplanted in a 20 m² plot at a spacing of 20 cm x 15 cm with 2:8 ratio to A and R line using RCB design with 3 replications. Combinations viz GA₃ (60 ppm) only, GA₃ (60 ppm) + KH₂PO4 (1.5 kg), GA₃ (60 ppm) + Boric acid (1.5 kg) per hectare were applied at 5%, 15-20% and 35-40% flowering stages. Twelve combinations of treatment were done as GA₃ concentrations vs. flowering stages. Fertilizers @ 150:100:70:60:10 kg/ha urea, TSP, MP, gypsum and zinc were applied. Intercultural operations, irrigation, rouging, and supplementary pollination were performed.

Source of Information: BRRI Annual Report 2006-2007,page no. 239, BRRI, Gazipur-1701, Bangladesh

Article Link (Online Journal):

Funding Source:

1. Government

Budget: 60000/-

Total Budget (Tk.) : 60000/-

Achievement/Findings:

The treatment GA3+ KH₂PO₄ at 5% and 35-40% flowering stages gave higher (602 kg/ha) seed yield

Knowledge Management: Report/Proceedings