Integrated Disease and Pest Management Strategies for Maize in Uganda

CRSP:   |  Region:   |  Topic:   |  Database:
Details

Project Code:
Not Available

Start Date:
1999

End Date:
2004

CRSP Phase:
Phase 2

Budget:
Not Available

Countries:

Participants

Lead University:

Other Partners:
R.C. Pratt, P.E. Lipps (The Ohio State University); G. Bigirwa (NARO/NAARI); and E. Adipala (Makerere University); K. Pixley (CIMMYT, Zimbabwe); J.B.J. van Rensburg (Grain Crops Institute, ARC), Hans Gevers (Quality Seed CC); G. Asea and S. Gordon (The Ohio State University)

Principal Investigator(s):
R.C. Pratt, P.E. Lipps (The Ohio State University); G. Bigirwa (NARO/NAARI); and E. Adipala (Makerere University); K. Pixley (CIMMYT, Zimbabwe); J.B.J. van Rensburg (Grain Crops Institute, ARC), Hans Gevers (Quality Seed CC); G. Asea and S. Gordon (The Ohio State University)

Co-Principal Investigator(s):
R.C. Pratt, P.E. Lipps (The Ohio State University); G. Bigirwa (NARO/NAARI); and E. Adipala (Makerere University); K. Pixley (CIMMYT, Zimbabwe); J.B.J. van Rensburg (Grain Crops Institute, ARC), Hans Gevers (Quality Seed CC); G. Asea and S. Gordon (The Ohio State University)

Overview

Molecular marker data were analyzed based on VO613Y x Pa405 F2:3 and F3:4 disease severity ratings across US and RSA environments using a selective genotyping strategy and composite interval analysis procedures. Quantitative trait loci (QTL) on two chromosomes (2L and 1L) were consistently identified and they explained over 40% of the variance across both generations and environments. These results indicate that VO613Y is a source of resistance that can be deployed effectively in both Africa and the US Corn Belt. Resistant progeny lines (VP31 and VP90) have been selected for resistance to C. zeae-maydis infection and good agronomic traits. These lines have been crossed to a maize inbred adapted to sub-Saharan African conditions (CML202) and an inbred adapted to the U.S. Corn Belt (B104). A program to use molecular marker assisted selection in a population of over 400 VP31 x CML202 F2:3 progeny lines has been initiated during 2003 in Ohio.

Objectives

Enhance sustainability of maize production in mid- and high-altitude East African agroecosystems by improvement of host resistance to the leading foliar pathogens and insect pests: Maize streak virus (MSV); Exserohilum turcicum, causal agent of Northern Corn Leaf Blight (NCLB); and Cercospora zeae-maydis, causal agent of gray leaf spot (GLS) disease. Molecular breeding tools will be developed to enhance selection of adapted germplasm with improved resistance to multiple pathogens.

Outcomes

Coming soon

Send us your questions or comments

Your Name (required)

Your Email (required)

Comment

Please enter this text:
captcha

[current-page]