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Stem Rust Resistance Screening Nursery of Wheat

M. S. Hossain
Wheat Research Centre, BARI

M. M. A. Reza
Wheat Research Centre, BARI

K. Mustarin
Wheat Research Centre, BARI

R. Islam
Wheat Research Centre, BARI

M. M. Rahman
Wheat Research Centre, BARI

P. K. Malaker
Wheat Research Centre, BARI

Abstract/ Executive Summary:

A total of 200 wheat entries including local check varieties of the 8^thStem Rust Resistance Screening Nursery from CIMMYT were evaluated for their response to BpLB and stem rust, grain yield and other agronomic characters under field condition in three different locations. The nursery was surrounded by spreader rows of susceptible varieties. Among the entries, 15 lines were selected based on disease severity and agronomic performance assessed over locations. AUDPC of the selected lines ranged from 171 to 312, while the susceptible check variety Prodip showed the AUDPC value of 496. All the selected lines were free from leaf rust, while Prodip showed 60S reaction. Grain yields of the selected entries varied between 421 and 605 g/plot, whereas 431 g/plot was obtained from the check variety Prodip. Days to heading, plant height and 1000-grain weight of the selected lines were within the acceptable range.

Keywords: Stem rust, Screening nursery, Disease reaction, Wheat, Agronomic characters

Location: Dinajpur, Jamalpur and Jessore

Start Date: 00-00-2013

End Date: 00-00-2014

Program Area: Pest Management

Commodity: Diseases, Wheat

Objectives:

To evaluate the lines of the 8^th Stem Rust Resistance Screening Nursery for disease reaction, yield and other agronomic characters under field condition.

Methodology:

The 8^th SRRSN consisting of 200 wheat entries from CIMMYT including local check varieties were evaluated for disease response, yield and other agronomic performances. The materials were planted in 2 m long 2 row-plots with 20 cm spacing between rows and 30 cm between entries in the mid December in three different locations-Dinajpur, Jamalpur and Jessore. The nursery was surrounded by spreaders rows of susceptible varieties. Recommended fertilizers were applied and regular agronomic practices were followed for normal crop growth. Rust was scored on modified Cobb scale. Severity of stem rust was scored on double-digit scale (00-99) of Saari and Prescott (1975), converted to percent diseased leaf area (% DLA) and AUDPC was calculated according to Sharma and Duveiller (2003). Agronomic data were recorded on days to heading, plant height, 1000-grain weight and grain yield. Agronomic score (0-5) was given to individual entries for their general agronomy in the field.

Source of Information: Annual Research Report, Wheat Research Centre, BARI--2013-14

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Among the 200 entries tested, 15 lines were selected on the basis of BpLB severity (AUDPC), stem rust reaction, 1000-grain weight, grain yield and other agronomic characters assessed over locations. The selected lines were free from leaf rust infection, while the check variety Prodip showed 60S reaction. Among the selected lines, 2 entries (46, 53) were selected in all locations and the others in two locations. AUDPC for BpLB of the selected lines ranged from 171 to 312, while the check variety Prodip had AUDPC value of 496. Grain yields of the selected entries varied between 421 and 605 g/plot, whereas 431 g/plot was obtained from the check variety Prodip. Days to heading, plant height and 1000-grain weight of the selected lines were within acceptable limit as compared to the check varieties. The agronomic score was 3 out 5 for majority of the selected lines.

Out of 200 entries tested, 15 lines were selected based on disease severity, 1000-grain weight, grain yield and other agronomic characters. The selected lines will be included in national nurseries for further evaluation and use in hybridization scheme to develop genetic diversity of rust resistance.

Knowledge Management: Report/Proceedings