slides for steve oct 2008
Post on 17-Jul-2015
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1
Chemistry
Traits Seeds
Roundup Ready&
Insect resistant crops
Integrated channel&
Technology Transfer
R & Dengine
2
What is plant breeding?
The Art, Science And Business Of Plant Improvement
Doing KnowingValue
JudgementSelling
3
Breeding Goals
Adapted to all climatic conditions.
Good stable yields.
110RM to 135RM range.
Good quality grain.
Prolificacy for areas that plant lower plant densities.
Disease tolerance.
Good standability for irrigation.
4
Two inbred lines are crossed to produce a hybrid.
Line A Line B
A x B Hybrid
5
Line A Line B
A x B Hybrid
6
Subtropical
Tropical
Subtropical
Temperate
lTemperate
Germplasm exchange (1.1 million to date)
7
Donor Inbred to convertrrRR F1 BC1 BC7
BCnF1BCnF2
Screen for zygosity
Same inbred with added gene - Homozygous
BCnF3
Screen for zygosity
Screen for APand gene presence
Trait Integration
8
Efficacy – MON810
Non BtBt
9
Corn Root Worm gene
10
Plant populations in South Africa
Headcount = 6 (Only TI)
12 000 – 20 000 plants/haRow width = 2.1m
35 000 – 45 000 plants/haRow width = 0.91m
20 000 – 35 000 plants/haRow width = 1.5m
11
Specialized Equipment
1.5 m
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