Collaboration leads to progress in reducing 
degeneration in RTB 
Greg Forbes 
RTB Annual Meeting, Entebbe 
October, 2014
Why How 
What 
NARS 
adopt 
integrated 
approach 
Yield gap 
reduced 
ips Where 
HR, OFM 
and CS 
used 
strategica 
lly by 
farmers 
Evidence, 
advocacy 
Partnersh
Why degeneration?
Rethinking degeneration 
Degeneration 
Clean seed
In developing countries.. 
Clean Seed = 
< 2%
Integrated approach.. 
Degeneration 
Clean seed 
Host 
resistance 
On-farm 
management
Integrated approach.. 
Degeneration 
Clean seed 
Host 
resistance 
? 
? On-farm 
? 
management
How? 
Arusha, Feb 2013
Future: Continuing the cycle 
Field 
studies 
Modeling 
Trial design 
Parameter 
estimates 
Validation
How? 
440 MB
How? 
440 MB
How?
How?
Certified disease-free 
seed 
Positive 
selection 
Outputs:
Outputs:
Future: Continuing the cycle 
Field 
studies 
Modeling 
Trial design 
Parameter 
estimates 
Validation
Future: Toward impact
Future: Toward impact
Impact pathway - lite 
NARS adopt 
integrated 
approach 
Yield gap 
reduced 
HR, OFM and 
CS used 
strategically by 
farmers 
Evidence, 
advocacy 
Partnerships
Thank you 
Ferrebeekeeper.com

Collaboration leads to progress in reducing degeneration in RTB