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