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CIM19EAPP2-31

CIMMYT's eastern Africa product pipeline 2 (EA-PP2) focuses on developing late-maturing, white grain, high-yielding maize hybrids that are drought tolerant, NUE, resistant to GLS, TLB, MSV, ear rots, and rust, and are suitable for food use in tropical rainfed dry/wet mid-altitude areas in eastern Africa.
and 2020 Regional On-farm Trials. 
  General Information
  Adaptation/Agroecological zone 1000 - 1600 masl
  Type of product Three-way cross hybrid
  Year first announced 2021
     
  Grain Characteristics
      Grain color White
Grain Yield   Grain texture Semi-flint
Grain yield under optimum conditions 9.1 t/ha      
Grain yield on-farm 7.2 t/ha   Biotic Stress Performance
Grain yield under drought stress 3.1 t/ha   Turcicum leaf blight (TLB) (1-9) 4.0
Grain yield under HD 10.6 t/ha   Grey leaf spot (GLS) (1-9) 1.3
Grain yield under low N stress 2.5 t/ha   Common rust (1-9) 3.4
Grain yield under MLN art. inoc. 0.2 t/ha   Maize Lethal Necrosis (MLN) under art. inoc. (1-9) 7.0
Grain yield under random stress 4.2 t/ha   Maize streak virus (MSV) (1-9) 3.1%
Grain yield under striga conditions 1.6 t/ha   Ear Rots 11.9%
      Diseases are scored on a 1-9 scale, where 1 = Highly resistant; 5 = Tolerant; 9 = Highly susceptible.
Agronomic Characteristics  
Maturity 179.2 DAP      
Plant height 261 cm   Seed Production Characteristics
Ear height 139 cm   Female seed yield  10.3 t/ha
Bad husk cover 3.3%   Male seed yield  2.9 t/ha
Root lodging 5.3%   Nicking -2.0 Days
Stalk lodging 5.6%      
Anther-silking interval 0.6 Days   Comments
Ear aspect (1-5) 2.3   Product information is based on data from various trials conducted by CIMMYT in eastern Africa in 2019 and 2020.

Abbreviations:
art. inf. = artificial infestation
art. inoc. = artificial inoculation
DAP = days after planting
GLS = Grey Leaf Spot
HD = High Density (80,000 plants per ha)
Low N = Managed Low Nitrogen
masl = meters above sea level
MD = Managed drought
MSV = maize streak virus
NUE = Nitrogen Use Efficient
Opt = Optimum Management
TLB = Turcicum Leaf Blight
Plant and ear aspects are scored on 1-5 scale, where 1 = desirable and 5 = undesirable characteristics  
 
     
Further Links  
Full Announcement  
Trial Data Summary  
Regional Trial Site Information  
     
     
     
     
     
Patent Information:

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Tags
Region > Eastern Africa
Year announced > 2021
Biotic Stress Tolerance > Grey leaf spot (GLS)
Biotic Stress Tolerance > Turcicum leaf blight (TLB)
Abiotic Stress Tolerance > Nitrogen-use efficient (NUE)
Abiotic Stress Tolerance > Drought tolerant
Maturity Group > Late maturing
Product Type > Three-way cross hybrid
Grain Color > White grain
Adaptation > Mid-altitudes
Biotic Stress Tolerance > Ear rots
Biotic Stress Tolerance > Maize streak virus (MSV)
Biotic Stress Tolerance > Rust
Grain Texture > Semi-flint
For Information, Contact:
Nicholas Davis
Program Manager
CIMMYT
n.davis@cgiar.org

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