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CIM23SAPP1B-02

CIM23SAPP1B-02 is a high-yielding, late-maturing maize hybrid with white grain, that is drought tolerant, NUE, and resistant to GLS, TLB, ear rots, and MSV. It is suitable for cultivation for food use in tropical, rainfed, dry/wet mid-altitude and transition ecologies in southern Africa and similar agroecologies. It is especially notable for yielding multiple ears per plant and having good male parent seed yield.    General Information
  Target region Southern Africa
  Adaptation/Agroecological zone 400-1800 masl
  Type of product Three-way cross hybrid
  Year first announced 2024
     
  Why farmers say they like it*
   High Yield, Big Cobs, Disease resistance
     
Grain Yield   *Common keywords from farmer feedback (CIMMYT Southern Africa 2024 Stage 5 Trials)
Grain yield under optimum conditions 10.82 t/ha  
Grain yield under managed drought 2.26 t/ha      
Grain yield under low nitrogen 2.69t/ha   Grain Characteristics
Grain Yield on-farm (severe stress*) 1.66 t/ha    Grain color White
* The 2023/24 season in Southern Africa was characterized by the worst drought of the century, declared a national disaster in several countries. Many of the farmers participating in the trial reported write-offs.    Grain texture Semi-dent
     
  Biotic Stress Performance
      Turcicum leaf blight (TLB) (1-9)* 2.8
Agronomic Characteristics     Grey leaf spot (GLS) (1-9)* 2.2
Maturity group Late   Maize Streak Virus (MSV) (1-9)* 3.3
50% anthesis 72 DAP   Ear rots 6.9%
952 GDD   *Diseases are scored on a 1-9 scale, where 1 = Highly resistant; 5 = Tolerant; 9 = Highly susceptible.
Anthesis-silking interval 0.52 Days  
Plant height 255 cm      
Ear height 133 cm   Seed Production Characteristics
Ears per plant 1.33   Single-cross female parent yield 9.29 t/ha
Ear position (ratio) 0.52   Male parent yield 3.81 t/ha
Bad husk cover 5.6%   Nicking -3.0
Ear aspect (1-5)* 2.7      
Root lodging 0.3%   Comments
Stalk lodging 2.2%   Product information is based on data from CIMMYT Southern Africa 2022/23 Stage 4 and 2023/24 Stage 5 Trials. Actual performance will vary depending on a number of agronomic and environmental factors.

Abbreviations:
DAP = days after planting
GDD = Growing Degree Days °C
GLS = Grey Leaf Spot
MSV= Maize Streak Virus
NUE = Nitrogen Use Efficient
masl = meters above sea level
TLB = Turcicum Leaf Blight
*Ear aspect is scored on 1-5 scale, where 1 = desirable and 5 = undesirable characteristics  
 
     
Further Links  
Full Product Announcement
(including trial results summary and site information)
 
 
     
     
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Tags
Product Type > Three-way cross hybrid
Abiotic Stress Tolerance > Drought tolerant
Abiotic Stress Tolerance > Nitrogen-use efficient (NUE)
Adaptation > Mid-altitudes
Biotic Stress Tolerance > Ear rots
Biotic Stress Tolerance > Grey leaf spot (GLS)
Biotic Stress Tolerance > Turcicum leaf blight (TLB)
Biotic Stress Tolerance > Maize streak virus (MSV)
Grain Color > White grain
Grain Texture > Semi-dent
Maturity Group > Late maturing
Region > Southern Africa
Year announced > 2024
For Information, Contact:
Nicholas Davis
Program Manager
CIMMYT
n.davis@cgiar.org

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