Project
Integrated Management of Insect Pests Groundnut: Determination of Economic Injury Levels and Action Threshold for Thrips on Groundnuts
Details
Project Code:
Not Available
Start Date:
1999
End Date:
2004
CRSP Phase:
Phase 2
Budget:
Not Available
Countries:
Uganda
Participants
Lead University:
Ohio State 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
