1. Maize Group Report Back

2. ACCI: Incorporation of an MSV resistance gene into Mozambican maize
varieties, mediated by use of MAS
WHAT
When Output
Year Period
1. F7 advance to F8 2013
April -
Sept
56
2. F5 advance to F6 2013 Jun - Nov 30
3. F8 advance to F9 2013-14 Nov - April 56
4. F6 advance to F7 2013-14 Nov - April 30
5. Phenotyping F6 & F8 lines 56
a) Confirmation of MSV
resistance
2013-14 Nov - April Data
b) Inbred line trials 2013-14 Nov - April Data
6. Testcross hybrid trials 2013-14 Nov - April Data
7. Releasing inbred lines 2014
May -
June
10

3. QTL-based MAS and GS
QTL Detection
 QTLs are localized to marker
intervals and their effect
sizes estimated.
 QTLs are ranked by effect
size. Those with largest
effects are “declared”
significant.
QTL application
 QTL Pyramids
 Marker Assisted Recurrent
Selection (MARS)
 QTL detection relies on significance
tests. Majority of the small variations
ignored
 Beavis effect: exaggerated QTL
effect estimates
 Good x Bad - Biparental populations
do not readily translate into breeding
applications
 In low heritability trials, often no
QTLs are detected for complex traits!

4. Looking further ahead: AMDROUT to AAA
(Affordable, Accessible, Asian Drought Tolerant Maize Project)
 Syngenta Foundation for Sustainable Agriculture (SFSA)
 Partnership with NARS and Syngenta
 Bigger in scope: discovery to delivery
 More populations under MARS-GWS in addition to
other activities
 Identification of target markets
 Development to dissemination
 Details of seed production: requirements, plans,
characteristics of inbred parents