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Screening of Existing Parental Lines, F2 Populations and Bc1f1 Populations Against Bb Resistance During Boro,2013-14

Anowara Akter
Scientific Officer
Hybrid Rice Division Bangladesh Rice Research Institute Bangladesh, Gazipur-1701

Mohammad Ashik Iqbal Khan
Senior Scientific Officer
Plant Pathology Division Bangladesh Rice Research Institute Bangladesh, Gazipur-1701

M Jamil Hasan
Principal Scientific Officer
Hybrid Rice Division Bangladesh Rice Research Institute Bangladesh, Gazipur-1701

Abstract/ Executive Summary:

Bacterial leaf blight (BB), caused by Xanthomonas oryzae pv. oryzae (Xoo), is a devasing disease in the rice growing countries of Asia. Bacterial blight is a major disease of a hybrid rice. With respect to Increasing demand for rice especially in developing countries hybrid rice is considered as a viable alternative technology for breaking the present yield ceiling of modern varieties.In this experiment to identification of BB resistance maintainers, restorers, F₂ populations and BC1F1 populations from existing materials. A total of 19 parental lines, Eight F₂ populations with parents and 3 BC1F1 populations were screened against bacterial blight (Xanthomonas oryzae pv. Oryzae) pathogen. The experiment was conducted under pathology screening plot during Boro season 2013-14. Plants were inoculated at seedling stage. Most virulent and representative isolate of major race (BX09) in Bangladesh was inoculated by leaf clipping method. Data on percent leaf area damage were collected 14 days after inoculation. None of the parents were found resistant to BB but six (6) F₂ generations out of eight such as BRRI11B/IRBB60, BRRI15R/IRBB60, BRRI15R/IRBB21BRRI827R/IRBB21, IRBB66/BRRI827R and IRBB66/BR6839-41-5-1R were found BB resistant primarily. Among them, only one BC1F1 populations (BRRI 15R/IRBB60) was found BB resistant.

Keywords: BB, Screening, Hybrid rice parental lines.

Location: BRRI HQ, Gazipur-1701, Bangladesh

Start Date: 00-00-2013

End Date: 00-00-2014

Program Area: Variety and Species

Commodity: Rice

Objectives:

To identify BB resistance maintainers, restorers, F2 populations and BC1F1 populations from existing materials.

Methodology:

A total of 19 parental lines, Eight F₂ populations with parents and 3 BC1F1 populations were screened against bacterial blight (Xanthomonas oryzae pv. Oryzae) pathogen. The experiment was conducted under pathology screening plot during Boro season 2013-14. Plants were inoculated at seedling stage. Most virulent and representative isolate of major race (BX09) in Bangladesh was inoculated by leaf clipping method. Data on percent leaf area damage were collected 14 days after inoculation.

Source of Information: BRRI Anual Report,2013-14, Page no-139, BRRI,Gazipur-1701, Bangladesh

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

None of the parents were found resistant to BB but six (6) F₂ generations out of eight such as BRRI11B/IRBB60, BRRI15R/IRBB60, BRRI15R/IRBB21BRRI827R/IRBB21, IRBB66/BRRI827R and IRBB66/BR6839-41-5-1R were found BB resistant primarily. Among them, only one BC1F1 populations (BRRI 15R/IRBB60) was found BB resistant.

Knowledge Management: Report/Proceedings