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Performance of Bb Resistant Genotypes (pyramid Lines) at Different Aezs of Bangladesh During Aman 2011 and Boro 2011-12

Dr. Mohammad Ashik Iqbal Khan
Senior Scientific Officer
Bangladesh Rice Research Institute, Gazipur-1701

Md. Rejwan Bhuiyan
Scientific Officer
Bangladesh Rice Research Institute, Gazipur-1701

Md. Mamunur Rashid
Scientific Officer
Bangladesh Rice Research Institute, Gazipur-1701

Md. Abul Monsor
Scientific Officer
Bangladesh Rice Research Institute, Regional Station Sonagazi, Feni

Dr. Md. Tahmid Hossain Ansary
Principle Scientific Offier
Bangladesh Rice Research Institute, Regional Station Rajshahi, Rajshahi

Abstract/ Executive Summary:

The tested pyramid lines showed different types of reaction in different locations and seasons. In most cases, IRBB60, IRBB65 and IRBB66 performed best against BB pathogen. Though, IRBB21 is a monogenic line, it also performed best like pyramid lines. In T. Aman season at Barisal, none of the tested pyramid lines, showed resistant reaction under natural condition. This trial submerged several times by the tidal flash after crop establishment. There is a possibility not to work BB resistant gene(s) under submergence condition. The yield performances of the tested materials were low in T. Aman season compared to Boro season. Especially in T. Aman at Barisal, yield performance was very low due to tidal flash. Though, IRBB21 is a monogenic line, it performed best in disease resistance and yield performance (Table 8). The selected materials will be used for durable BB resistant rice variety in Bangladesh.

Keywords: Preformance, Bacterial blight resistance, Bangladesh

Location: Gazipur, Borisal, Sonagazi and Rajshahi

Start Date: 01-07-2011

End Date: 30-06-2012

Program Area: Pest Management

Commodity: Rice

Objectives:

To know the performance of BB resistant genotypes (pyramid lines) at different AEZs

Methodology:

The experiment was conducted in Aman 2011 and Boro 2011-12 season at BRRI Gazipur, Barisal, Sonagazi and Rajshahi farm to see the performance of BB resistant genotypes (pyramid lines). In this study, ten pyramid lines with standard checks were evaluated under natural condition. Thirty to thirty five day old seedlings were transplanted with the spacing 20cm X 20cm having 2-3 seedlings/hill. Plot size was 3m X 2m with 3 replications. Cultivation procedure and fertilizers was used as BRRI recommended dose. Cultural management was done as and when necessary. In case of Rajshahi trial, plants were inoculated artificially with BB isolates (BXO9). Data of yield components and percent leaf area damage by BB pathogen were taken at dough to maturity. Finally diseased data of leaf area damage were converted to disease severity scale (0-9) following SES (1996).

Source of Information: Proceedings of the BRRI Annual Internal Research Review, 2011-12

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Performance of BB resistant genotypes in different locations was identified.

Knowledge Management: Report/Proceedings