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CIM19EAPP1B-05

CIMMYT's eastern Africa product pipeline 1B (EA-PP1B) focuses on developing intermediate maturing, white grain, high-yielding maize hybrids that are drought tolerant, NUE, resistant to MLN, GLS, TLB, ear rots, and MSV, and are suitable for food use in tropical rainfed dry/wet mid-altitude areas in eastern Africa.   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 texture Semi-dent
Grain Yield      
Grain yield under optimum conditions 8.1 t/ha   Biotic Stress Performance
Grain yield on-farm 6.5 t/ha   Turcicum leaf blight (TLB) (1-9) 4.3
Grain yield under drought stress 2.9 t/ha   Grey leaf spot (GLS) (1-9) 1.7
Grain yield under FAW (art. inf.; no-choice trial) 8.2 t/ha   Maize Lethal Necrosis (MLN) under art. inoc. (1-9) 4.3
Grain yield under HD 10.4 t/ha   Ear Rots 2.3%
Grain yield under low N stress 3.6 t/ha   Diseases are scored on a 1-9 scale, where 1 = Highly resistant; 5 = Tolerant; 9 = Highly susceptible.
Grain yield under MLN artificial Inoculation 5.1 t/ha  
Grain yield under random stress 3.9 t/ha      
Grain yield under striga conditions 4.5 t/ha   Seed Production Characteristics
      Female seed yield  8.4 t/ha
Agronomic Characteristics   Male seed yield  2.0 t/ha
Maturity 136 DAP   Nicking -4.0 Days
Plant height 232 cm      
Ear height 120 cm   Comments
Bad husk cover 6.4%   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
Root lodging 11.7%  
Stalk lodging 8.9%  
Anthesis-silking interval 0.8 Days  
Plant aspect (1-5) 2.1  
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 > Maize Lethal Necrosis (MLN)
Biotic Stress Tolerance > Grey leaf spot (GLS)
Biotic Stress Tolerance > Turcicum leaf blight (TLB)
Adaptation > Mid-altitudes
Abiotic Stress Tolerance > Nitrogen-use efficient (NUE)
Abiotic Stress Tolerance > Drought tolerant
Maturity Group > Intermediate maturing
Product Type > Three-way cross hybrid
Grain Color > White grain
Biotic Stress Tolerance > Ear rots
Grain Texture > Semi-dent
For Information, Contact:
Nicholas Davis
Program Manager
CIMMYT
n.davis@cgiar.org

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