About Us

bannerweb1The CGIAR Research Program on Roots, Tubers and Bananas (RTB) is one of a new series of initiatives spearheaded by CGIAR to bring together the research synergies and resources of multiple agricultural research-for-development centers to improve efficiencies and increase impacts. The purpose of RTB is to tap the underutilized potential of root, tuber, and banana crops to improve food security, nutrition, and livelihoods.

RTB Management Team


Graham Thiele

Director, CGIAR Research Program on Roots, Tubers and Bananas (RTB)
Robert Domaingue

Robert Domaingue

Deputy Director, Mixed Research Unit, Genetic Improvement and Adaptation of mediterranean and tropical plants, CIRAD
Stephan Weise

Stephan Weise

DDG Research, Bioversity
Oscar Ortiz

Oscar Ortiz

DDG Development, International Potato Center
Joe Tohme

Joe Tohme

Agrobiodiversity Research Area Director, CIAT

Robert Asiedu

R4D Director, IITA

RTB Focal Points and Theme Leaders


Inge Van den Bergh

RTB Focal Point at Bioversity
Robert Domaingue

Robert Domaingue

RTB Focal Point at CIRAD

Clair Hershey

RTB Focal Point at CIAT

James Legg

RTB Focal Point at IITA

Philippe Monneveux

RTB Focal Point at CIP

Nicolas Roux

Leader Theme 1: Genetic Resources

Augusto Becerra

Leader Theme 2: Development of Varieties

James Legg

Leader Theme 3: Managing pests and diseases
Jorge Andrade-Piedra

Jorge Andrade Piedra

Leader Theme 4: High quality planting material

Stefan Hauser

Leader Theme 5: Ecologically robust cropping system

Dominique Dufour

Leader Theme 6: Post harvest and markets