| CIMMYT's biofortified PVA maize pipeline focuses on developing high-yielding, nutritious maize hybrids that have orange grain and are drought tolerant, NUE, resistant to GLS, TLB, ear rots, and MSV, and are suitable for food use in tropical rainfed dry/wet mid-altitude areas in southern Africa. |
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General Information |
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Adaptation/Agroecological zone |
800-1500 masl |
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Region |
Southern Africa |
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Type of product |
Three-way cross hybrid |
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Year first announced |
2017 |
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Grain Characteristics |
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Grain color |
orange |
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Grain texture |
Semi-flint |
| Grain Yield |
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PVA content |
9.9µg/g |
| Grain yield (MEA) (OPT) |
11 t/ha |
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| Grain yield (MEB) (OPT) |
7 t/ha |
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Biotic Stress Performance |
| Grain yield (MEC) (RS) |
5 t/ha |
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Turcicum leaf blight (TLB) (1-9) |
1.7 |
| Grain yield under drought stress |
3.5 t/ha |
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Rust (1-9) |
1.0 |
| Grain yield under low N stress (NUE) |
2.6 t/ha |
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Maize Streak Virus (MSV) (1-9) |
2.0 |
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Grey leaf spot (GLS) (1-9) |
1.6 |
| Agronomic Characteristics |
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Ear rot |
6.8% |
| Maturity |
Early |
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Diseases were originally scored on a 1-5 scale but have been converted here to a 1-9 scale, where 1 = Highly resistant; 5 = Tolerant; 9 = Highly susceptible. |
| Days to 50% Anthesis |
62.8 |
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| Anthesis-silking interval |
1.2 days |
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| Bad husk cover |
0.1% |
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Seed Production Characteristics |
| Ear aspect (1-5) |
3.1 |
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Female seed yield |
14.01 t/ha |
| Ears per plant |
1.1 |
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Male seed yield |
2.5 t/ha |
| Ear height |
88.6 cm |
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Nicking |
5 days |
| Plant height |
186.3 cm |
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| Root lodging |
7.6% |
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Comments |
| Stalk lodging |
3.7% |
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Product information is based on data from the CIMMYT Southern Africa Maize Regional On-Station 2017 Trials. Actual performance will vary depending on a number of agronomic and environmental factors.
Abbreviations:
GLS = Grey Leaf Spot
masl = Meters above sea level
MEA = Mega-environment A (wet upper mid-altitudes)
MEB = Mega-environment B (wet lower mid-altitudes)
MEC = Mega-environment C (dry mid-altitudes)
MSV = maize streak virus
NUE = Nitrogen Use Efficient
PVA = Provitamin A
TLB = Turcicum Leaf Blight |
| 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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| 1. Maize Mega-Environments (map) |
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| 2. Biofortified orange maize is as efficacious as a vitamin A supplement |
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| 3. Provitamin A maize within the maize seed systems and grain value chain in Tanzania |
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