Agricultural Research Management Information System

Home
Research Summary
Search
About Us
- ARMIS
- Brochure
Contact Us
Report
User Request
Data Input
Help
- Operation Manual
  - PDF
  - Video
- Program Area & Commodity
We have reached 37600 number of research entries at this moment.

- Logout

Research Detail

Home
Research
Detail

Study of Virulence Reaction of Blast Isolates Against Differential Varieties

Mohammad Hossain
Senior Scientific Officer
Plant Pathology Division BRRI Gazipur

M A Ali
Chief Scientific Offier
Plant Pathology Division BRRI Gazipur

Abstract/ Executive Summary:

An investigation was carried out to observe virulence reaction of P. grisea using monogenic lines of rice. Virulence analysis of blast isolates to differential varieties indicated that virulent frequencies (%) ranged from the lowest 8 with IRBL9-W (Pi9) to 87 with IRBLks-F5 (Pik-s). Higher virulent frequencies (>60%) were observed against the DVs for Pi20, Pi12(t), Pit, Piz-t and Pik-s genes while lower virulent frequencies (<20%) were recorded against the DVs for Pi9, Pish, Pita and Pita-2 genes. Moderate and almost similar virulence pattern was found against Pita= Pi4(t), Piz-5(pi-2(t)), Pib, Piz, Pi3, Pik-m, Pi5, Pia, Pik-p, Pi7(t), Pi1(t), Pii, Pik-h, Pik and Pi19 genes with virulence frequencies ranging from 20-60%. Except four DVs for Pi9, Pish, Pita and Pita-2 genes, all other DVs were susceptible to all tested isolates. Among them Pi9, Pish showed resistance frequencies of 90% and above while Pita and Pita-2 showed 82-83% against all blast isolates.

Keywords: Rice, virulence reaction, blast, isolates, differential varieties

Location:

Start Date: 01-07-2013

End Date: 30-06-2014

Program Area: Pest Management

Commodity: Diseases

Objectives:

To observe virulence reaction of P. grisea using monogenic lines of rice

Methodology:

A total of 139 blast isolates represented eight AEZs of Bangladesh were evaluated with the basis of the reaction patterns against 25 differential varieties (DVs) harboring twenty-three resistant genes and susceptible checks LTH and/or US2. NIAS method (Hayashi et al. 2009) was followed for inoculum preparation, inoculation of plant materials, disease assessment.

Source of Information: Proceedings of the BRRI Annual Internal Review for 2013-14

Article Link (Online Journal):

Funding Source:

1. Bangladesh Agricultural Research Council

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Pi9, Pish gene/s showed resistance frequencies of 90% and above while Pita and Pita-2 showed 82-83% against all blast isolates.

Knowledge Management: Report/Proceedings