| CIM23EAPP3-42 is a late-maturing, high-yielding, maize hybrid adapted to highland agroecologies of eastern Africa, with white grain, with resistance to GLS, TLB, ear rot, rust and TLB. |
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General Information |
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Target region |
Eastern Africa |
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Adaptation/Agroecological zone |
1800-2400 masl |
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Type of product |
Three-way cross |
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Year first announced |
2025 |
| Grain Yield |
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| Grain yield (opt.) |
9.80 t/ha |
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Why farmers say they like it* |
| Grain yield under on-farm conditions |
9.30 t/ha |
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High yielding, good grain texture and Ear aspect |
| Grain yield under low N stress |
3.20 t/ha |
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| Grain yield (RS) |
7.00 t/ha |
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*Common keywords from farmer feedback (CIM24ROFT-EA-PP3-01) |
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| Agronomic Characteristics |
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Kernel Characteristics |
| Maturity group |
Late |
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Kernel color |
White |
| 50% anthesis |
91.2 days |
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Kernel texture |
Semi-dent |
| Anthesis-silking interval |
1.70 days |
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| Ear height |
135.7 cm |
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Biotic Stress Performance |
| Plant height |
265.1 cm |
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Grey leaf spot (GLS) (nat.) (1-9)* |
3.7 |
| Ears per plant |
1.30 |
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Turcicum leaf blight (TLB) (nat.) (1-9)* |
4.0 |
| Bad husk cover |
3.32% |
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Rust (nat.) (1-9)* |
2.7 |
| Ear aspect (1-5)* |
2.60 |
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Ear rots |
3.13% |
| Root lodging |
6.50% |
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*Diseases are scored on a 1-9 scale, where 1 = Highly resistant; 5 = Tolerant; 9 = Highly susceptible. |
| Stalk lodging |
5.90% |
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| *Plant and ear aspects are scored on 1-5 scale, where 1 = desirable and 5 = undesirable characteristics |
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Seed Production Characteristics |
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SC female parent yield |
10.1 t/ha |
| Further Links |
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Male parent yield |
2.7 t/ha |
Full Product Announcement
(including trial results summary and site information) |
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Nicking |
0.9 days |
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Comments |
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Product information is based on data from the CIMMYT East Africa 2023 Regional Trial (CIM23RT-EA-PP3-01) and 2024 regional on‐farm trials (CIM24ROFT-EA-PP3-01). Actual performance will vary depending on a number of agronomic and environmental factors.
Abbreviations:
AI = artificial infestation/inoculation
GDD = growing degree-days (°C)
GLS = Grey Leaf Spot
Low N = managed low nitrogen stress
masl = meters above sea level
nat. = natural infestation
opt. = optimum (44,444 plants per ha)
RS = random stress
SC = single-cross
TLB = Turcicum Leaf Blight |
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