CIM22EAPP1-02-02

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CIM22EAPP1-02-02 is an early-maturing, high-yielding, white maize hybrid with drought tolerance, nitrogen-use efficiency, and resistance to GLS, TLB, ear rots, MLN, and rust. The product is notable for its yield potential under MLN disease pressure and good seed producibility characteristics.   General Information   Target region Eastern Africa   Adaptation/Agroecological zone 1000-1600 masl   Type of product Three-way cross   Year first announced 2024         Why farmers say they like it*   High yield, big ears, disease resistant       Grain Yield   *Common keywords from farmer feedback (EA-ROFT 2023-1A) Grain yield (OPT) 6.79 t/ha       Grain yield (RS) 2.95 t/ha   Kernel Characteristics Grain yield on-farm >3 t/ha* 5.71 t/ha   Kernel color White Grain yield on-farm < 3 t/ha** 1.69 t/ha   Kernel texture Semi-flint Grain yield under low N 3.18 t/ha       Grain yield under MD 3.93 t/ha   Biotic Stress Performance Grain yield under FAW (AI) 4.33 t/ha   MLN (AI) (1-9)* 3.00 Grain yield under GLS (AI) 6.11 t/ha   Grey leaf spot (GLS) (AI) (1-9)* 3.97 Grain yield under TLB (AI) 6.29 t/ha   Common rust (nat) (1-9)* 2.79 Grain yield under MLN (AI) 7.50 t/ha   Turcicum leaf blight (TLB) (AI) (1-9)* 3.51 *Average of ROFT sites where grain yield was greater than 3 t/ha
**Average of ROFT sites where grain yield was less than or equal to 3 t/ha   Maize Streak Virus (MSV) Resistant allele present   Ear rots 3.3%   *Diseases are scored on a 1-9 scale, where 1 = Highly resistant; 5 = Tolerant; 9 = Highly susceptible.       Agronomic Characteristics       Maturity group Early   Seed Production Characteristics 50% anthesis 70.2 days   SC female parent yield 8.86 t/ha (798 GDD)   Male parent yield 3.28 t/ha Anthesis-silking interval  0.20 days   Nicking -2.1 days Farmers' score* 2.58       Ear height  113 cm   Comments Plant height  225 cm   Product information is based on data from CIMMTY's Eastern Africa 2022 Stage 4 (CIM22EAPP1B-RT) and 2023 Stage 5 (EA-ROFT 2023-1B) Trials. Actual performance will vary depending on a number of agronomic and environmental factors.

Abbreviations:
AI = artificial infestation/inoculation
FAW = fall armyworm
GDD = growing degree-days (°C)
GLS = Grey Leaf Spot
Low N = managed low nitrogen
masl = meters above sea level
MLN = maize lethal necrosis
MSV = maize streak virus
nat. = natural infestation
NUE = Nitrogen-use efficient
Opt = Optimal management
ROFT = Regional On-Farm Trials
RS = random stress
SC = single-cross
TLB = Turcicum Leaf Blight Ears per plant 1.00   Bad husk cover 13%   Ear aspect (1-5)* 2.61   Plant aspect (1-5)* 2.78   Root lodging 5.7%   Stalk lodging 3.2%   *Farmers' Score is based on a 1-5 scale where 1 = most preferred and 5 = least preferred
**Plant and ear aspects are scored on 1-5 scale, where 1 = desirable and 5 = undesirable characteristics               Further Links   Full Product Announcement
(including trial results summary and site information)