| ZM309 is an early-maturing open-pollinated maize variety (OPV) with white grain that is drought-tolerant and NUE, with resistance to GLS, MSV, and TLB, suitable for food use in tropical, rainfed, dry/wet mid-altitude and lowland ecologies in southern Africa and similar agroecologies. |
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General Information |
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Target region |
Southern Africa |
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Adaptation |
<1800 masl |
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Type of product |
Open-Pollinated Variety (OPV) |
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Year entered in Regional Trials |
2007 |
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Grain Characteristics |
| Grain Yield |
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Grain color |
White |
| Grain yield ME-A (optimum) |
5.38 t/ha |
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Grain texture |
Flint |
| Grain yield ME-A (low N stress) |
2.29 t/ha |
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| Grain yield ME-A (disease stress) |
6.29 t/ha |
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Biotic Stress Performance |
| Grain yield ME-A (random stress) |
4.03 t/ha |
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Turcicum leaf blight (TLB) (1-9)* |
3.0 |
| Grain yield ME-B (optimum) |
5.50 t/ha |
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Grey leaf spot (GLS) (1-9)* |
3.0 |
| Grain yield ME-B (low N stress) |
3.30 t/ha |
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Common rust (P. Sorg) (1-9)* |
3.2 |
| Grain yield ME-B (random stress) |
3.34 t/ha |
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Ear rots |
5.3% |
| Grain yield ME-C (optimum) |
4.53 t/ha |
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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. |
| Grain yield ME-C (random stress) |
2.17 t/ha |
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| Grain yield ME-C (striga) |
1.50 t/ha |
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Comments |
| Agronomic Characteristics |
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Product information is based on data from the 2014/15 regional trials for Early Maturing OPVs (EPOP15) evaluated at 22 locations under different management conditions in Southern Africa. Actual performance will vary depending on a number of agronomic and environmental factors.
CIMMYT grants licenses to pursue varietal registration of OPVs to qualified public-sector partners. Following successful varietal release in a country, commercial licenses may be issued to private-sector partners by CIMMYT or the varietal registrant on a non-exclusive basis, subject to the terms of the license issued to the varietal registrant.
Private-sector partners interested in commercializing a CIMMYT-derived OPV in a country where the product has not yet been released are encouraged to approach a qualified public-sector partner who may apply to CIMMYT for a varietal registration license.
Abbreviations:
ai = artificial inoculation
GLS = Grey Leaf Spot
low N = low soil nitrogen
masl = meters above sea level
ME-A = Maize mega-environment A (wet upper mid-altitudes)
ME-B = Maize mega-environment B (wet lower mid-altitudes)
ME-C = Maize mega-environment C (dry mid-altitude)
MSV= Maize Streak Virus
NUE = Nitrogen Use Efficient
OPV = open-pollinated variety
TLB = Turcicum Leaf Blight (E. turcicum) |
| Days to 50% anthesis |
62 |
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| Plant height |
163.3 cm |
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| Ear height |
67.4 cm |
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| Ear position (ratio) |
0.4 |
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| Root lodging |
15.1% |
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| Stalk lodging |
2.2% |
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| Ears per plant |
0.9 |
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| Bad husk cover |
3.3% |
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| Ear aspect (1-5)* |
2.8 |
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| Leaf senescence (1-10) |
6.8 |
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| *Ear aspect is scored on 1-5 scale, where 1 = desirable and 5 = undesirable characteristics |
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| Further Links |
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| 1. Results of the 2014/15 Regional Trials - Early Maturing OPVs (EPOP15) |
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| 2. Maize Mega-Environments (map) |
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