| CIM22EAPP2-03 is a late-maturing, high-yielding, white maize hybrid, with resistance to GLS, TLB, rust, ear rots, root & stalk lodging, bred for use in tropical, rainfed, wet upper mid-altitude areas in eastern Africa and similar agroecologies. It is notable for good seed producibility. |
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General Information |
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Target region |
Eastern Africa |
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Adaptation/Agroecological zone |
1300-1900 masl |
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Type of product |
Three-way cross |
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Year first announced |
2024 |
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Why farmers say they like it* |
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High yield, strong stalk, good husk |
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| Grain Yield |
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*Common keywords from farmer feedback (EA-ROFT 2023-1A) |
| Grain yield (Opt) |
9.65 t/ha |
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| Grain yield (RS) |
3.97 t/ha |
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Kernel Characteristics |
| Grain yield on-farm >3 t/ha* |
7.07 t/ha |
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Kernel color |
White |
| Grain yield on-farm < 3 t/ha** |
1.89 t/ha |
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Kernel texture |
Semi-flint |
| Grain yield under low N |
2.34 t/ha |
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| Grain yield under MD |
4.08 t/ha |
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Biotic Stress Performance |
| Grain yield under Striga (AI) |
3.30 t/ha |
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Grey leaf spot (GLS) (AI) (1-9)* |
3.00 |
| Grain yield under FAW (AI) |
4.43 t/ha |
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Turcicum leaf blight (TLB) (AI) (1-9)* |
3.70 |
| Grain yield under GLS (AI) |
4/41 t/ha |
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Rust (nat.) (1-9)* |
2.73 |
| Grain yield under TLB (AI) |
7.96 t/ha |
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Ear rots |
8.3% |
| Grain yield under MLN (AI) |
0.99 t/ha |
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*Diseases are scored on a 1-9 scale, where 1 = Highly resistant; 5 = Tolerant; 9 = Highly susceptible. |
*Average of ROFT sites where grain yield was greater than 3 t/ha
**Average of ROFT sites where grain yield was less than or equal to 3 t/ha |
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Seed Production Characteristics |
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SC female parent yield |
11.26 t/ha |
| Agronomic Characteristics |
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Male parent yield |
2.26 t/ha |
| Maturity group |
Late |
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Nicking |
-3.1 days |
| 50% anthesis |
90 days |
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| (839 GDD) |
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Comments |
| Anthesis-silking interval |
1.02 days |
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Product information is based on data from Eastern Africa 2022 Stage 4 (CIM22EAPP2-RT) and 2023 Stage 5 (EA-ROFT 2023-P2) Trials. Actual performance will vary depending on a number of agronomic and environmental factors.
Abbreviations:
AI = artificial infestation/inoculation
FAW = fall armyworm
GDD = growing degree-days (°C)
GLS = Grey Leaf Spot
Low N = managed low nitrogen
masl = meters above sea level
MLN = maize lethal necrosis
MSV = maize streak virus
nat. = natural infestation
NUE = Nitrogen-use efficient
Opt = Optimal management
ROFT = Regional On-Farm Trials
RS = random stress
SC = single-cross
TLB = Turcicum Leaf Blight |
| Farmers' score* |
2.22 |
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| Ear height |
134 cm |
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| Plant height |
258 cm |
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| Ears per plant |
1.35 |
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| Bad husk cover |
13.4% |
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| Ear aspect (1-5)** |
2.40 |
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| Plant aspect (1-5)** |
3.07 |
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| Root lodging |
6.2% |
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| Stalk lodging |
3.9% |
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*Farmers' Score is based on a 1-5 scale where 1 = most preferred and 5 = least preferred
**Plant and ear aspects are scored on 1-5 scale, where 1 = desirable and 5 = undesirable characteristics |
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| Further Links |
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Full Product Announcement
(including trial results summary and site information) |
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